mirror of
https://github.com/ocornut/imgui.git
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Add Xlib backend for mouse/keyboard/clipboard handling, and one example
This commit is contained in:
Clément Gallet
parent
5b5e9bd0cb
commit
cf28c8131e
644
backends/imgui_impl_xlib.cpp
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644
backends/imgui_impl_xlib.cpp
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// dear imgui: Platform Backend for Xlib
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// This needs to be used along with a Renderer (e.g. OpenGL3, Vulkan..)
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// Implemented features:
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// [X] Platform: Clipboard support.
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// [X] Platform: Mouse support.
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// [X] Platform: Keyboard support.
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// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
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// Issues:
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// [ ] Platform: Missing touchscreen support.
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// [ ] Platform: Missing gamepad support.
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// [ ] Platform: Missing IME support.
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// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
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// Learn about Dear ImGui:
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// - FAQ https://dearimgui.com/faq
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// - Getting Started https://dearimgui.com/getting-started
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// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
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// - Introduction, links and more at the top of imgui.cpp
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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#include "imgui.h"
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#ifndef IMGUI_DISABLE
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#include "imgui_impl_xlib.h"
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// Xlib
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/keysym.h>
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#include <X11/XF86keysym.h>
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#include <X11/XKBlib.h> // XkbKeycodeToKeysym
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#include <X11/extensions/XInput2.h>
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#include <X11/extensions/XI2.h>
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#include <X11/cursorfont.h>
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#include <time.h> // clock_gettime()
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#include <limits.h>
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#include <stdlib.h>
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#ifdef X_HAVE_UTF8_STRING
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#include <locale.h>
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#endif
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// Xlib Data
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struct ImGui_ImplXlib_Data
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{
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Display* Dpy;
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Window Win;
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int Xi2Opcode;
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XIM IM;
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XIC IC;
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timespec Time;
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int MouseButtonsDown;
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Cursor MouseCursors[ImGuiMouseCursor_COUNT];
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Cursor LastMouseCursor;
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char* ClipboardTextData;
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bool SelectionWaiting;
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Atom XA_CLIPBOARD;
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Atom XA_SELECTION;
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Atom XA_TARGETS;
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Atom XA_INCR;
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Atom* XA_MIME;
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unsigned int MimeCount;
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ImGui_ImplXlib_Data() { memset((void*)this, 0, sizeof(*this)); }
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};
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static const char *text_mime_types[] = {
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"text/plain;charset=utf-8",
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"text/plain",
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"TEXT",
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"UTF8_STRING",
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"STRING"
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};
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// Backend data stored in io.BackendPlatformUserData to allow support for multiple Dear ImGui contexts
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// It is STRONGLY preferred that you use docking branch with multi-viewports (== single Dear ImGui context + multiple windows) instead of multiple Dear ImGui contexts.
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// FIXME: multi-context support is not well tested and probably dysfunctional in this backend.
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// FIXME: some shared resources (mouse cursor shape, gamepad) are mishandled when using multi-context.
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static ImGui_ImplXlib_Data* ImGui_ImplXlib_GetBackendData()
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{
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return ImGui::GetCurrentContext() ? (ImGui_ImplXlib_Data*)ImGui::GetIO().BackendPlatformUserData : nullptr;
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}
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// Functions
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static const char* ImGui_ImplXlib_GetClipboardText(void*)
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{
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ImGui_ImplXlib_Data* bd = ImGui_ImplXlib_GetBackendData();
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// Get the window that holds the selection
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Window owner = XGetSelectionOwner(bd->Dpy, bd->XA_CLIPBOARD);
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if (owner == None)
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{
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if (bd->ClipboardTextData)
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{
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free (bd->ClipboardTextData);
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bd->ClipboardTextData = nullptr;
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}
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}
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else if (owner == bd->Win)
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{
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// The copied text is from us, nothing to do
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}
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else
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{
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if (bd->ClipboardTextData)
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{
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free (bd->ClipboardTextData);
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bd->ClipboardTextData = nullptr;
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}
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/* Request that the selection owner copy the data to our window */
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owner = bd->Win;
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XConvertSelection(bd->Dpy, bd->XA_CLIPBOARD, bd->XA_MIME[1], bd->XA_SELECTION, owner, CurrentTime);
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XSync(bd->Dpy, 0);
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bd->SelectionWaiting = true;
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XEvent event;
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// TODO: Add a timeout
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while (bd->SelectionWaiting) {
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XNextEvent(bd->Dpy, &event);
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ImGui_ImplXlib_ProcessEvent(&event);
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}
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Atom seln_type;
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int seln_format;
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unsigned long count;
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unsigned long overflow;
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unsigned char *src = nullptr;
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if (XGetWindowProperty(bd->Dpy, owner, bd->XA_SELECTION, 0, INT_MAX / 4, False,
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bd->XA_MIME[1], &seln_type, &seln_format, &count, &overflow, &src) == Success) {
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if (seln_type == bd->XA_MIME[1]) {
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bd->ClipboardTextData = strndup((char *)src, count);
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} else if (seln_type == bd->XA_INCR) {
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/* FIXME: Need to implement the X11 INCR protocol */
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}
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XFree(src);
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}
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}
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return bd->ClipboardTextData;
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}
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static void ImGui_ImplXlib_SetClipboardText(void*, const char* text)
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{
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ImGui_ImplXlib_Data* bd = ImGui_ImplXlib_GetBackendData();
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IM_ASSERT(bd->XA_CLIPBOARD != None && "Couldn't access X clipboard!");
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if (bd->ClipboardTextData)
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free(bd->ClipboardTextData);
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bd->ClipboardTextData = strdup(text);
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XSetSelectionOwner(bd->Dpy, bd->XA_CLIPBOARD, bd->Win, CurrentTime);
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}
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static ImGuiKey ImGui_ImplXlib_KeySymToImGuiKey(KeySym keysym)
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{
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switch (keysym)
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{
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case XK_Tab: return ImGuiKey_Tab;
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case XK_Left: return ImGuiKey_LeftArrow;
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case XK_Right: return ImGuiKey_RightArrow;
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case XK_Up: return ImGuiKey_UpArrow;
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case XK_Down: return ImGuiKey_DownArrow;
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case XK_Prior: return ImGuiKey_PageUp;
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case XK_Next: return ImGuiKey_PageDown;
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case XK_Home: return ImGuiKey_Home;
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case XK_End: return ImGuiKey_End;
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case XK_Insert: return ImGuiKey_Insert;
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case XK_Delete: return ImGuiKey_Delete;
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case XK_BackSpace: return ImGuiKey_Backspace;
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case XK_space: return ImGuiKey_Space;
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case XK_Return: return ImGuiKey_Enter;
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case XK_Escape: return ImGuiKey_Escape;
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case XK_quoteright: return ImGuiKey_Apostrophe;
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case XK_comma: return ImGuiKey_Comma;
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case XK_minus: return ImGuiKey_Minus;
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case XK_period: return ImGuiKey_Period;
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case XK_slash: return ImGuiKey_Slash;
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case XK_semicolon: return ImGuiKey_Semicolon;
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case XK_equal: return ImGuiKey_Equal;
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case XK_bracketleft: return ImGuiKey_LeftBracket;
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case XK_backslash: return ImGuiKey_Backslash;
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case XK_bracketright: return ImGuiKey_RightBracket;
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case XK_quoteleft: return ImGuiKey_GraveAccent;
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case XK_Caps_Lock: return ImGuiKey_CapsLock;
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case XK_Scroll_Lock: return ImGuiKey_ScrollLock;
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case XK_Num_Lock: return ImGuiKey_NumLock;
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case XK_Print: return ImGuiKey_PrintScreen;
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case XK_Pause: return ImGuiKey_Pause;
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case XK_KP_0: return ImGuiKey_Keypad0;
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case XK_KP_1: return ImGuiKey_Keypad1;
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case XK_KP_2: return ImGuiKey_Keypad2;
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case XK_KP_3: return ImGuiKey_Keypad3;
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case XK_KP_4: return ImGuiKey_Keypad4;
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case XK_KP_5: return ImGuiKey_Keypad5;
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case XK_KP_6: return ImGuiKey_Keypad6;
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case XK_KP_7: return ImGuiKey_Keypad7;
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case XK_KP_8: return ImGuiKey_Keypad8;
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case XK_KP_9: return ImGuiKey_Keypad9;
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case XK_KP_Decimal: return ImGuiKey_KeypadDecimal;
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case XK_KP_Divide: return ImGuiKey_KeypadDivide;
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case XK_KP_Multiply: return ImGuiKey_KeypadMultiply;
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case XK_KP_Subtract: return ImGuiKey_KeypadSubtract;
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case XK_KP_Add: return ImGuiKey_KeypadAdd;
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case XK_KP_Enter: return ImGuiKey_KeypadEnter;
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case XK_KP_Equal: return ImGuiKey_KeypadEqual;
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case XK_Control_L: return ImGuiKey_LeftCtrl;
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case XK_Shift_L: return ImGuiKey_LeftShift;
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case XK_Alt_L: return ImGuiKey_LeftAlt;
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case XK_Super_L: return ImGuiKey_LeftSuper;
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case XK_Control_R: return ImGuiKey_RightCtrl;
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case XK_Shift_R: return ImGuiKey_RightShift;
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case XK_Alt_R: return ImGuiKey_RightAlt;
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case XK_Super_R: return ImGuiKey_RightSuper;
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case XK_Menu: return ImGuiKey_Menu;
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case XK_0: return ImGuiKey_0;
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case XK_1: return ImGuiKey_1;
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case XK_2: return ImGuiKey_2;
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case XK_3: return ImGuiKey_3;
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case XK_4: return ImGuiKey_4;
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case XK_5: return ImGuiKey_5;
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case XK_6: return ImGuiKey_6;
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case XK_7: return ImGuiKey_7;
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case XK_8: return ImGuiKey_8;
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case XK_9: return ImGuiKey_9;
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case XK_a: return ImGuiKey_A;
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case XK_b: return ImGuiKey_B;
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case XK_c: return ImGuiKey_C;
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case XK_d: return ImGuiKey_D;
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case XK_e: return ImGuiKey_E;
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case XK_f: return ImGuiKey_F;
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case XK_g: return ImGuiKey_G;
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case XK_h: return ImGuiKey_H;
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case XK_i: return ImGuiKey_I;
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case XK_j: return ImGuiKey_J;
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case XK_k: return ImGuiKey_K;
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case XK_l: return ImGuiKey_L;
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case XK_m: return ImGuiKey_M;
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case XK_n: return ImGuiKey_N;
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case XK_o: return ImGuiKey_O;
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case XK_p: return ImGuiKey_P;
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case XK_q: return ImGuiKey_Q;
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case XK_r: return ImGuiKey_R;
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case XK_s: return ImGuiKey_S;
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case XK_t: return ImGuiKey_T;
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case XK_u: return ImGuiKey_U;
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case XK_v: return ImGuiKey_V;
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case XK_w: return ImGuiKey_W;
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case XK_x: return ImGuiKey_X;
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case XK_y: return ImGuiKey_Y;
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case XK_z: return ImGuiKey_Z;
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case XK_F1: return ImGuiKey_F1;
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case XK_F2: return ImGuiKey_F2;
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case XK_F3: return ImGuiKey_F3;
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case XK_F4: return ImGuiKey_F4;
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case XK_F5: return ImGuiKey_F5;
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case XK_F6: return ImGuiKey_F6;
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case XK_F7: return ImGuiKey_F7;
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case XK_F8: return ImGuiKey_F8;
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case XK_F9: return ImGuiKey_F9;
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case XK_F10: return ImGuiKey_F10;
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case XK_F11: return ImGuiKey_F11;
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case XK_F12: return ImGuiKey_F12;
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case XK_F13: return ImGuiKey_F13;
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case XK_F14: return ImGuiKey_F14;
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case XK_F15: return ImGuiKey_F15;
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case XK_F16: return ImGuiKey_F16;
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case XK_F17: return ImGuiKey_F17;
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case XK_F18: return ImGuiKey_F18;
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case XK_F19: return ImGuiKey_F19;
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case XK_F20: return ImGuiKey_F20;
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case XK_F21: return ImGuiKey_F21;
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case XK_F22: return ImGuiKey_F22;
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case XK_F23: return ImGuiKey_F23;
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case XK_F24: return ImGuiKey_F24;
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case XF86XK_Back: return ImGuiKey_AppBack;
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case XF86XK_Forward: return ImGuiKey_AppForward;
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}
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return ImGuiKey_None;
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}
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static void ImGui_ImplXlib_UpdateKeyModifiers(unsigned int xlib_key_mods)
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{
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ImGuiIO& io = ImGui::GetIO();
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io.AddKeyEvent(ImGuiMod_Ctrl, (xlib_key_mods & ControlMask) != 0);
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io.AddKeyEvent(ImGuiMod_Shift, (xlib_key_mods & ShiftMask) != 0);
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io.AddKeyEvent(ImGuiMod_Alt, (xlib_key_mods & Mod1Mask) != 0);
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io.AddKeyEvent(ImGuiMod_Super, (xlib_key_mods & Mod4Mask) != 0);
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}
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// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
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// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
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// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
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// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
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// If you have multiple events and some of them are not meant to be used by dear imgui, you may need to filter events based on their windowID field.
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bool ImGui_ImplXlib_ProcessEvent(XEvent* event)
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{
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ImGuiIO& io = ImGui::GetIO();
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ImGui_ImplXlib_Data* bd = ImGui_ImplXlib_GetBackendData();
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// Needed for Xim events
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if (XFilterEvent(event, None) == True)
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return true;
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switch (event->type)
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{
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case GenericEvent:
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{
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XGenericEventCookie *cookie = (XGenericEventCookie*)&event->xcookie;
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if (cookie->extension == bd->Xi2Opcode && XGetEventData(event->xcookie.display, cookie))
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{
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XIDeviceEvent *dev = (XIDeviceEvent*)cookie->data;
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switch (cookie->evtype)
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{
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case XI_Motion:
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{
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ImVec2 mouse_pos((float)dev->event_x, (float)dev->event_y);
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io.AddMouseSourceEvent(ImGuiMouseSource_Mouse);
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io.AddMousePosEvent(mouse_pos.x, mouse_pos.y);
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return true;
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}
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case XI_ButtonPress:
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case XI_ButtonRelease:
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{
|
||||||
|
if (dev->detail >= Button1 && dev->detail <= Button3)
|
||||||
|
{
|
||||||
|
int mouse_button = -1;
|
||||||
|
if (dev->detail == Button1) { mouse_button = 0; }
|
||||||
|
if (dev->detail == Button2) { mouse_button = 1; }
|
||||||
|
if (dev->detail == Button3) { mouse_button = 2; }
|
||||||
|
|
||||||
|
io.AddMouseSourceEvent(ImGuiMouseSource_Mouse);
|
||||||
|
io.AddMouseButtonEvent(mouse_button, (cookie->evtype == XI_ButtonPress));
|
||||||
|
bd->MouseButtonsDown = (cookie->evtype == XI_ButtonPress) ? (bd->MouseButtonsDown | (1 << mouse_button)) : (bd->MouseButtonsDown & ~(1 << mouse_button));
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
else if (dev->detail == Button4 || dev->detail == Button5)
|
||||||
|
{
|
||||||
|
float wheel_y = (dev->detail == Button4) ? 1.0f : -1.0f;
|
||||||
|
io.AddMouseSourceEvent(ImGuiMouseSource_Mouse);
|
||||||
|
io.AddMouseWheelEvent(0, wheel_y);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
XFreeEventData(event->xcookie.display, cookie);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
case KeyPress:
|
||||||
|
case KeyRelease:
|
||||||
|
{
|
||||||
|
ImGui_ImplXlib_UpdateKeyModifiers(event->xkey.state);
|
||||||
|
KeySym ks = XkbKeycodeToKeysym(event->xkey.display, event->xkey.keycode, 0, 0);
|
||||||
|
ImGuiKey key = ImGui_ImplXlib_KeySymToImGuiKey(ks);
|
||||||
|
io.AddKeyEvent(key, (event->type == KeyPress));
|
||||||
|
|
||||||
|
char text[64];
|
||||||
|
Status status = 0;
|
||||||
|
#ifdef X_HAVE_UTF8_STRING
|
||||||
|
if (bd->IC && event->type == KeyPress) {
|
||||||
|
int size = Xutf8LookupString(bd->IC, &event->xkey, text, sizeof(text), NULL, &status);
|
||||||
|
// Don't post text for unprintable characters
|
||||||
|
unsigned char c = text[0];
|
||||||
|
if ((size > 0) && (c > '\x20') && (c != '\x7f'))
|
||||||
|
io.AddInputCharactersUTF8(text);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
#endif
|
||||||
|
{
|
||||||
|
// The following function must be called even for key release events */
|
||||||
|
int size = XLookupString(&event->xkey, text, sizeof(text), NULL, NULL);
|
||||||
|
if (event->type == KeyPress && text[0]) {
|
||||||
|
// Don't post text for unprintable characters
|
||||||
|
unsigned char c = text[0];
|
||||||
|
if ((size > 0) && (c > '\x20') && (c != '\x7f'))
|
||||||
|
io.AddInputCharacter(c);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
case FocusIn:
|
||||||
|
case FocusOut:
|
||||||
|
{
|
||||||
|
io.AddFocusEvent(event->type == FocusIn);
|
||||||
|
|
||||||
|
#ifdef X_HAVE_UTF8_STRING
|
||||||
|
if (bd->IC) {
|
||||||
|
if (event->type == FocusIn)
|
||||||
|
XSetICFocus(bd->IC);
|
||||||
|
else
|
||||||
|
XUnsetICFocus(bd->IC);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
case SelectionNotify:
|
||||||
|
{
|
||||||
|
bd->SelectionWaiting = false;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
case SelectionRequest:
|
||||||
|
{
|
||||||
|
const XSelectionRequestEvent *req = &event->xselectionrequest;
|
||||||
|
|
||||||
|
XEvent sevent;
|
||||||
|
sevent.xany.type = SelectionNotify;
|
||||||
|
sevent.xselection.selection = req->selection;
|
||||||
|
sevent.xselection.target = None;
|
||||||
|
sevent.xselection.property = None;
|
||||||
|
sevent.xselection.requestor = req->requestor;
|
||||||
|
sevent.xselection.time = req->time;
|
||||||
|
|
||||||
|
if (req->target == bd->XA_TARGETS)
|
||||||
|
{
|
||||||
|
XChangeProperty(bd->Dpy, req->requestor, req->property,
|
||||||
|
4 /* XA_ATOM */, 32, PropModeReplace,
|
||||||
|
(unsigned char*)bd->XA_MIME, 6);
|
||||||
|
sevent.xselection.property = req->property;
|
||||||
|
sevent.xselection.target = bd->XA_TARGETS;
|
||||||
|
}
|
||||||
|
else if (bd->ClipboardTextData)
|
||||||
|
{
|
||||||
|
for (unsigned int i = 0; i < sizeof(text_mime_types)/sizeof(text_mime_types[0]); i++)
|
||||||
|
{
|
||||||
|
if (req->target != bd->XA_MIME[i])
|
||||||
|
continue;
|
||||||
|
|
||||||
|
XChangeProperty(bd->Dpy, req->requestor, req->property,
|
||||||
|
req->target, 8, PropModeReplace,
|
||||||
|
(unsigned char*)bd->ClipboardTextData, strlen(bd->ClipboardTextData));
|
||||||
|
sevent.xselection.property = req->property;
|
||||||
|
sevent.xselection.target = req->target;
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
XSendEvent(bd->Dpy, req->requestor, 0, 0, &sevent);
|
||||||
|
XSync(bd->Dpy, False);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
case SelectionClear:
|
||||||
|
{
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool ImGui_ImplXlib_Init(Display* display, Window window)
|
||||||
|
{
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
IM_ASSERT(io.BackendPlatformUserData == nullptr && "Already initialized a platform backend!");
|
||||||
|
|
||||||
|
// Setup backend capabilities flags
|
||||||
|
ImGui_ImplXlib_Data* bd = IM_NEW(ImGui_ImplXlib_Data)();
|
||||||
|
io.BackendPlatformUserData = (void*)bd;
|
||||||
|
io.BackendPlatformName = "imgui_impl_xlib";
|
||||||
|
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
|
||||||
|
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
|
||||||
|
|
||||||
|
bd->Dpy = display;
|
||||||
|
bd->Win = window;
|
||||||
|
|
||||||
|
io.SetClipboardTextFn = ImGui_ImplXlib_SetClipboardText;
|
||||||
|
io.GetClipboardTextFn = ImGui_ImplXlib_GetClipboardText;
|
||||||
|
io.ClipboardUserData = nullptr;
|
||||||
|
|
||||||
|
// Store all used atoms
|
||||||
|
bd->XA_SELECTION = XInternAtom(bd->Dpy, "IMGUI_SELECTION", 0);
|
||||||
|
bd->XA_TARGETS = XInternAtom(bd->Dpy, "TARGETS", 0);
|
||||||
|
bd->XA_INCR = XInternAtom(bd->Dpy, "INCR", 0);
|
||||||
|
bd->XA_CLIPBOARD = XInternAtom(bd->Dpy, "CLIPBOARD", 0);
|
||||||
|
|
||||||
|
bd->MimeCount = sizeof(text_mime_types)/sizeof(text_mime_types[0]) + 1;
|
||||||
|
bd->XA_MIME = (Atom*)malloc(bd->MimeCount * sizeof(Atom));
|
||||||
|
bd->XA_MIME[0] = bd->XA_TARGETS;
|
||||||
|
for (unsigned int i = 1; i < bd->MimeCount; i++) {
|
||||||
|
bd->XA_MIME[i] = XInternAtom(bd->Dpy, text_mime_types[i-1], 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Select keyboard/focus events
|
||||||
|
XSelectInput(display, window, KeyPressMask | KeyReleaseMask | FocusChangeMask);
|
||||||
|
|
||||||
|
// Setup XInput for mouse inputs
|
||||||
|
int xi2_opcode, xi2_event, xi2_error;
|
||||||
|
Bool ret = XQueryExtension(display, "XInputExtension", &xi2_opcode, &xi2_event, &xi2_error);
|
||||||
|
|
||||||
|
IM_ASSERT(ret == True && "Could not load XInputExtension!");
|
||||||
|
|
||||||
|
bd->Xi2Opcode = xi2_opcode;
|
||||||
|
|
||||||
|
XIEventMask xi2_eventmask = {};
|
||||||
|
static unsigned char xi2_mask[XIMaskLen(XI_LASTEVENT)] = {};
|
||||||
|
|
||||||
|
XISetMask(xi2_mask, XI_Motion);
|
||||||
|
XISetMask(xi2_mask, XI_ButtonPress);
|
||||||
|
XISetMask(xi2_mask, XI_ButtonRelease);
|
||||||
|
|
||||||
|
xi2_eventmask.deviceid = XIAllMasterDevices;
|
||||||
|
xi2_eventmask.mask_len = sizeof(xi2_mask);
|
||||||
|
xi2_eventmask.mask = xi2_mask;
|
||||||
|
|
||||||
|
XISelectEvents(display, window, &xi2_eventmask, 1);
|
||||||
|
|
||||||
|
// Setup XIM
|
||||||
|
#ifdef X_HAVE_UTF8_STRING
|
||||||
|
XSetLocaleModifiers("");
|
||||||
|
bd->IM = XOpenIM(display, NULL, NULL, NULL);
|
||||||
|
bd->IC = XCreateIC(bd->IM, XNClientWindow, window, XNFocusWindow, window, XNInputStyle, XIMPreeditNothing | XIMStatusNothing, NULL);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
// Load mouse cursors
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_Arrow] = XCreateFontCursor(display, XC_left_ptr);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_TextInput] = XCreateFontCursor(display, XC_xterm);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_ResizeAll] = XCreateFontCursor(display, XC_fleur);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_ResizeNS] = XCreateFontCursor(display, XC_sb_v_double_arrow);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_ResizeEW] = XCreateFontCursor(display, XC_sb_h_double_arrow);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = XCreateFontCursor(display, XC_fleur);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = XCreateFontCursor(display, XC_fleur);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_Hand] = XCreateFontCursor(display, XC_hand2);
|
||||||
|
bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = XCreateFontCursor(display, XC_pirate);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
void ImGui_ImplXlib_Shutdown()
|
||||||
|
{
|
||||||
|
ImGui_ImplXlib_Data* bd = ImGui_ImplXlib_GetBackendData();
|
||||||
|
IM_ASSERT(bd != nullptr && "No platform backend to shutdown, or already shutdown?");
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
|
||||||
|
if (bd->IC)
|
||||||
|
XDestroyIC(bd->IC);
|
||||||
|
if (bd->ClipboardTextData)
|
||||||
|
free(bd->ClipboardTextData);
|
||||||
|
for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++)
|
||||||
|
XFreeCursor(bd->Dpy, bd->MouseCursors[cursor_n]);
|
||||||
|
bd->LastMouseCursor = 0;
|
||||||
|
|
||||||
|
io.BackendPlatformName = nullptr;
|
||||||
|
io.BackendPlatformUserData = nullptr;
|
||||||
|
io.BackendFlags &= ~(ImGuiBackendFlags_HasMouseCursors | ImGuiBackendFlags_HasSetMousePos);
|
||||||
|
IM_DELETE(bd);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void ImGui_ImplXlib_UpdateMouseData()
|
||||||
|
{
|
||||||
|
ImGui_ImplXlib_Data* bd = ImGui_ImplXlib_GetBackendData();
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
|
||||||
|
Window focus;
|
||||||
|
int revert;
|
||||||
|
XGetInputFocus(bd->Dpy, &focus, &revert);
|
||||||
|
bool is_app_focused = (focus == bd->Win);
|
||||||
|
if (is_app_focused)
|
||||||
|
{
|
||||||
|
// (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
|
||||||
|
if (io.WantSetMousePos)
|
||||||
|
XWarpPointer(bd->Dpy, None, bd->Win, 0, 0, 0, 0, (int)io.MousePos.x, (int)io.MousePos.y);
|
||||||
|
|
||||||
|
// (Optional) Fallback to provide mouse position when focused (XI_Motion already provides this when hovered or captured)
|
||||||
|
// if (bd->MouseButtonsDown == 0)
|
||||||
|
// {
|
||||||
|
// int window_x, window_y, mouse_x_global, mouse_y_global;
|
||||||
|
// Window root, child;
|
||||||
|
// unsigned int mask;
|
||||||
|
// if (True == XQueryPointer(bd->Dpy, bd->Win, &root, &child, &mouse_x_global, &mouse_y_global, &window_x, &window_y, &mask))
|
||||||
|
// io.AddMousePosEvent((float)(mouse_x_global - window_x), (float)(mouse_y_global - window_y));
|
||||||
|
// }
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static void ImGui_ImplXlib_UpdateMouseCursor()
|
||||||
|
{
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
|
||||||
|
return;
|
||||||
|
ImGui_ImplXlib_Data* bd = ImGui_ImplXlib_GetBackendData();
|
||||||
|
|
||||||
|
ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
|
||||||
|
if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None)
|
||||||
|
{
|
||||||
|
// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
|
||||||
|
XUndefineCursor(bd->Dpy, bd->Win);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
// Show OS mouse cursor
|
||||||
|
Cursor expected_cursor = bd->MouseCursors[imgui_cursor] ? bd->MouseCursors[imgui_cursor] : bd->MouseCursors[ImGuiMouseCursor_Arrow];
|
||||||
|
if (bd->LastMouseCursor != expected_cursor)
|
||||||
|
{
|
||||||
|
XDefineCursor(bd->Dpy, bd->Win, expected_cursor);
|
||||||
|
bd->LastMouseCursor = expected_cursor;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void ImGui_ImplXlib_NewFrame()
|
||||||
|
{
|
||||||
|
ImGui_ImplXlib_Data* bd = ImGui_ImplXlib_GetBackendData();
|
||||||
|
IM_ASSERT(bd != nullptr && "Did you call ImGui_ImplXlib_Init()?");
|
||||||
|
ImGuiIO& io = ImGui::GetIO();
|
||||||
|
|
||||||
|
// Setup display size (every frame to accommodate for window resizing)
|
||||||
|
int x, y;
|
||||||
|
unsigned int w = 0, h = 0, border_width, depth;
|
||||||
|
Window root;
|
||||||
|
XGetGeometry(bd->Dpy, bd->Win, &root, &x, &y, &w, &h, &border_width, &depth);
|
||||||
|
|
||||||
|
io.DisplaySize = ImVec2((float)w, (float)h);
|
||||||
|
|
||||||
|
// Setup time step
|
||||||
|
timespec current_time;
|
||||||
|
clock_gettime(CLOCK_MONOTONIC, ¤t_time);
|
||||||
|
if ((current_time.tv_sec < bd->Time.tv_sec) ||
|
||||||
|
((current_time.tv_sec == bd->Time.tv_sec) && (current_time.tv_nsec < bd->Time.tv_nsec)))
|
||||||
|
{
|
||||||
|
current_time.tv_sec = bd->Time.tv_sec;
|
||||||
|
current_time.tv_nsec = bd->Time.tv_nsec + 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (bd->Time.tv_sec > 0 || bd->Time.tv_nsec > 0)
|
||||||
|
io.DeltaTime = (float)(current_time.tv_sec - bd->Time.tv_sec) + (float)((double)(current_time.tv_nsec - bd->Time.tv_nsec) / 1000000000.0f);
|
||||||
|
else
|
||||||
|
io.DeltaTime = (float)(1.0f / 60.0f);
|
||||||
|
bd->Time = current_time;
|
||||||
|
|
||||||
|
ImGui_ImplXlib_UpdateMouseData();
|
||||||
|
ImGui_ImplXlib_UpdateMouseCursor();
|
||||||
|
}
|
||||||
|
|
||||||
|
//-----------------------------------------------------------------------------
|
||||||
|
|
||||||
|
#endif // #ifndef IMGUI_DISABLE
|
||||||
33
backends/imgui_impl_xlib.h
Normal file
33
backends/imgui_impl_xlib.h
Normal file
@ -0,0 +1,33 @@
|
|||||||
|
// dear imgui: Platform Backend for Xlib
|
||||||
|
// This needs to be used along with a Renderer (e.g. OpenGL3, Vulkan..)
|
||||||
|
|
||||||
|
// Implemented features:
|
||||||
|
// [X] Platform: Clipboard support.
|
||||||
|
// [X] Platform: Mouse support.
|
||||||
|
// [X] Platform: Keyboard support.
|
||||||
|
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
|
||||||
|
// Issues:
|
||||||
|
// [ ] Platform: Missing touchscreen support.
|
||||||
|
// [ ] Platform: Missing gamepad support.
|
||||||
|
// [ ] Platform: Missing IME support.
|
||||||
|
|
||||||
|
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
|
||||||
|
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
|
||||||
|
// Learn about Dear ImGui:
|
||||||
|
// - FAQ https://dearimgui.com/faq
|
||||||
|
// - Getting Started https://dearimgui.com/getting-started
|
||||||
|
// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
|
||||||
|
// - Introduction, links and more at the top of imgui.cpp
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
#include "imgui.h" // IMGUI_IMPL_API
|
||||||
|
#ifndef IMGUI_DISABLE
|
||||||
|
|
||||||
|
#include <X11/Xlib.h>
|
||||||
|
|
||||||
|
IMGUI_IMPL_API bool ImGui_ImplXlib_Init(Display* d, Window w);
|
||||||
|
IMGUI_IMPL_API void ImGui_ImplXlib_Shutdown();
|
||||||
|
IMGUI_IMPL_API void ImGui_ImplXlib_NewFrame();
|
||||||
|
IMGUI_IMPL_API bool ImGui_ImplXlib_ProcessEvent(XEvent* event);
|
||||||
|
|
||||||
|
#endif // #ifndef IMGUI_DISABLE
|
||||||
55
examples/example_xlib_opengl3/Makefile
Normal file
55
examples/example_xlib_opengl3/Makefile
Normal file
@ -0,0 +1,55 @@
|
|||||||
|
#
|
||||||
|
# Cross Platform Makefile
|
||||||
|
# Compatible with Ubuntu 14.04.1
|
||||||
|
#
|
||||||
|
# You will need Xlib and Xinput:
|
||||||
|
# Linux:
|
||||||
|
# apt-get install libx11-dev libxi-dev
|
||||||
|
#
|
||||||
|
|
||||||
|
#CXX = g++
|
||||||
|
CXX = clang++
|
||||||
|
|
||||||
|
EXE = example_xlib_opengl3
|
||||||
|
IMGUI_DIR = ../..
|
||||||
|
SOURCES = main.cpp
|
||||||
|
SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
|
||||||
|
SOURCES += $(IMGUI_DIR)/backends/imgui_impl_xlib.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl3.cpp
|
||||||
|
OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
|
||||||
|
|
||||||
|
CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
|
||||||
|
CXXFLAGS += -g -Wall -Wformat
|
||||||
|
LIBS = -ldl -lGL -lX11 -lXi
|
||||||
|
|
||||||
|
##---------------------------------------------------------------------
|
||||||
|
## OPENGL ES
|
||||||
|
##---------------------------------------------------------------------
|
||||||
|
|
||||||
|
## This assumes a GL ES library available in the system, e.g. libGLESv2.so
|
||||||
|
# CXXFLAGS += -DIMGUI_IMPL_OPENGL_ES2
|
||||||
|
# LIBS += -lGLESv2
|
||||||
|
## If you're on a Raspberry Pi and want to use the legacy drivers,
|
||||||
|
## use the following instead:
|
||||||
|
# LINUX_GL_LIBS = -L/opt/vc/lib -lbrcmGLESv2
|
||||||
|
|
||||||
|
##---------------------------------------------------------------------
|
||||||
|
## BUILD RULES
|
||||||
|
##---------------------------------------------------------------------
|
||||||
|
|
||||||
|
%.o:%.cpp
|
||||||
|
$(CXX) $(CXXFLAGS) -c -o $@ $<
|
||||||
|
|
||||||
|
%.o:$(IMGUI_DIR)/%.cpp
|
||||||
|
$(CXX) $(CXXFLAGS) -c -o $@ $<
|
||||||
|
|
||||||
|
%.o:$(IMGUI_DIR)/backends/%.cpp
|
||||||
|
$(CXX) $(CXXFLAGS) -c -o $@ $<
|
||||||
|
|
||||||
|
all: $(EXE)
|
||||||
|
@echo Build complete for $(ECHO_MESSAGE)
|
||||||
|
|
||||||
|
$(EXE): $(OBJS)
|
||||||
|
$(CXX) -o $@ $^ $(CXXFLAGS) $(LIBS)
|
||||||
|
|
||||||
|
clean:
|
||||||
|
rm -f $(EXE) $(OBJS)
|
||||||
11
examples/example_xlib_opengl3/README.md
Normal file
11
examples/example_xlib_opengl3/README.md
Normal file
@ -0,0 +1,11 @@
|
|||||||
|
|
||||||
|
# How to Build
|
||||||
|
|
||||||
|
## Linux and similar Unixes
|
||||||
|
|
||||||
|
Use our Makefile or directly:
|
||||||
|
```
|
||||||
|
c++ -I .. -I ../.. -I ../../backends
|
||||||
|
main.cpp ../../backends/imgui_impl_xlib.cpp ../../backends/imgui_impl_opengl3.cpp ../../imgui*.cpp
|
||||||
|
-lGL -lX11 -lXi -ldl
|
||||||
|
```
|
||||||
222
examples/example_xlib_opengl3/main.cpp
Normal file
222
examples/example_xlib_opengl3/main.cpp
Normal file
@ -0,0 +1,222 @@
|
|||||||
|
// Dear ImGui: standalone example application for Xlib + OpenGL
|
||||||
|
|
||||||
|
// Learn about Dear ImGui:
|
||||||
|
// - FAQ https://dearimgui.com/faq
|
||||||
|
// - Getting Started https://dearimgui.com/getting-started
|
||||||
|
// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
|
||||||
|
// - Introduction, links and more at the top of imgui.cpp
|
||||||
|
|
||||||
|
#include "imgui.h"
|
||||||
|
#include "imgui_impl_xlib.h"
|
||||||
|
#include "imgui_impl_opengl3.h"
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <GL/gl.h>
|
||||||
|
#include <GL/glx.h>
|
||||||
|
#include <GL/glxext.h>
|
||||||
|
|
||||||
|
// Main code
|
||||||
|
int main(int, char**)
|
||||||
|
{
|
||||||
|
// Setup Xlib
|
||||||
|
Display *display = XOpenDisplay(NULL);
|
||||||
|
if (display == NULL) {
|
||||||
|
printf("Error: Could not open display\n");
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
int screen_id = DefaultScreen(display);
|
||||||
|
|
||||||
|
static int visual_attribs[] = {
|
||||||
|
GLX_RENDER_TYPE, GLX_RGBA_BIT,
|
||||||
|
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
|
||||||
|
GLX_DOUBLEBUFFER, True,
|
||||||
|
GLX_RED_SIZE, 8,
|
||||||
|
GLX_GREEN_SIZE, 8,
|
||||||
|
GLX_BLUE_SIZE, 8,
|
||||||
|
GLX_DEPTH_SIZE, 24,
|
||||||
|
GLX_STENCIL_SIZE, 8,
|
||||||
|
None
|
||||||
|
};
|
||||||
|
|
||||||
|
int num_fbc = 0;
|
||||||
|
GLXFBConfig *fbc = glXChooseFBConfig(display, screen_id, visual_attribs, &num_fbc);
|
||||||
|
if (!fbc) {
|
||||||
|
printf("Error: glXChooseFBConfig() failed\n");
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
XVisualInfo *visual = glXGetVisualFromFBConfig(display, fbc[0]);
|
||||||
|
if (visual == 0) {
|
||||||
|
printf("Error: Could not create correct visual window\n");
|
||||||
|
XCloseDisplay(display);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Create window
|
||||||
|
XSetWindowAttributes window_attribs;
|
||||||
|
window_attribs.border_pixel = 0;
|
||||||
|
window_attribs.background_pixel = None;
|
||||||
|
window_attribs.colormap = XCreateColormap(display, RootWindow(display, screen_id), visual->visual, AllocNone);
|
||||||
|
Window window = XCreateWindow(display, RootWindow(display, screen_id), 0, 0, 1280, 720, 0, visual->depth, InputOutput, visual->visual, CWBackPixel | CWColormap | CWBorderPixel, &window_attribs);
|
||||||
|
|
||||||
|
// Handle window closing
|
||||||
|
Atom wmDeleteMessage = XInternAtom(display, "WM_DELETE_WINDOW", False);
|
||||||
|
XSetWMProtocols(display, window, &wmDeleteMessage, 1);
|
||||||
|
|
||||||
|
XFree(visual);
|
||||||
|
|
||||||
|
// Create GLX context
|
||||||
|
PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = NULL;
|
||||||
|
glXCreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC) glXGetProcAddressARB((const GLubyte *)"glXCreateContextAttribsARB");
|
||||||
|
|
||||||
|
#if defined(IMGUI_IMPL_OPENGL_ES2)
|
||||||
|
// GL ES 2.0 + GLSL 100
|
||||||
|
const char* glsl_version = "#version 100";
|
||||||
|
int context_attribs[] = {
|
||||||
|
GLX_CONTEXT_FLAGS_ARB , 0,
|
||||||
|
GLX_CONTEXT_PROFILE_MASK_ARB , GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
|
||||||
|
GLX_CONTEXT_MAJOR_VERSION_ARB, 2,
|
||||||
|
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
|
||||||
|
None
|
||||||
|
};
|
||||||
|
#else
|
||||||
|
// GL 3.0 + GLSL 130
|
||||||
|
const char* glsl_version = "#version 130";
|
||||||
|
int context_attribs[] = {
|
||||||
|
GLX_CONTEXT_FLAGS_ARB , 0,
|
||||||
|
GLX_CONTEXT_PROFILE_MASK_ARB , GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
|
||||||
|
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
|
||||||
|
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
|
||||||
|
None
|
||||||
|
};
|
||||||
|
#endif
|
||||||
|
|
||||||
|
GLXContext glx_context = glXCreateContextAttribsARB(display, fbc[0], 0, True, context_attribs);
|
||||||
|
|
||||||
|
if (glx_context == 0) {
|
||||||
|
printf("Error: Could not create GLX context\n");
|
||||||
|
XCloseDisplay(display);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
XMapWindow(display, window);
|
||||||
|
glXMakeCurrent(display, window, glx_context);
|
||||||
|
|
||||||
|
// Setup Dear ImGui context
|
||||||
|
IMGUI_CHECKVERSION();
|
||||||
|
ImGui::CreateContext();
|
||||||
|
ImGuiIO& io = ImGui::GetIO(); (void)io;
|
||||||
|
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
|
||||||
|
|
||||||
|
// Setup Dear ImGui style
|
||||||
|
ImGui::StyleColorsDark();
|
||||||
|
//ImGui::StyleColorsLight();
|
||||||
|
|
||||||
|
// Setup Platform/Renderer backends
|
||||||
|
ImGui_ImplXlib_Init(display, window);
|
||||||
|
ImGui_ImplOpenGL3_Init(glsl_version);
|
||||||
|
|
||||||
|
// Load Fonts
|
||||||
|
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
|
||||||
|
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
|
||||||
|
// - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
|
||||||
|
// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
|
||||||
|
// - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
|
||||||
|
// - Read 'docs/FONTS.md' for more instructions and details.
|
||||||
|
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
|
||||||
|
// - Our Emscripten build process allows embedding fonts to be accessible at runtime from the "fonts/" folder. See Makefile.emscripten for details.
|
||||||
|
//io.Fonts->AddFontDefault();
|
||||||
|
//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
|
||||||
|
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
|
||||||
|
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
|
||||||
|
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
|
||||||
|
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
|
||||||
|
//IM_ASSERT(font != nullptr);
|
||||||
|
|
||||||
|
// Our state
|
||||||
|
bool show_demo_window = true;
|
||||||
|
bool show_another_window = false;
|
||||||
|
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
|
||||||
|
|
||||||
|
// Main loop
|
||||||
|
bool done = false;
|
||||||
|
while (!done)
|
||||||
|
{
|
||||||
|
// Poll and handle events (inputs, window resize, etc.)
|
||||||
|
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
|
||||||
|
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
|
||||||
|
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
|
||||||
|
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
|
||||||
|
while (XPending(display))
|
||||||
|
{
|
||||||
|
XEvent event;
|
||||||
|
XNextEvent(display, &event);
|
||||||
|
ImGui_ImplXlib_ProcessEvent(&event);
|
||||||
|
|
||||||
|
if (event.type == ClientMessage && event.xclient.window == window && (Atom)event.xclient.data.l[0] == wmDeleteMessage)
|
||||||
|
done = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Start the Dear ImGui frame
|
||||||
|
ImGui_ImplOpenGL3_NewFrame();
|
||||||
|
ImGui_ImplXlib_NewFrame();
|
||||||
|
ImGui::NewFrame();
|
||||||
|
|
||||||
|
// 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
|
||||||
|
if (show_demo_window)
|
||||||
|
ImGui::ShowDemoWindow(&show_demo_window);
|
||||||
|
|
||||||
|
// 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
|
||||||
|
{
|
||||||
|
static float f = 0.0f;
|
||||||
|
static int counter = 0;
|
||||||
|
|
||||||
|
ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
|
||||||
|
|
||||||
|
ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
|
||||||
|
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
|
||||||
|
ImGui::Checkbox("Another Window", &show_another_window);
|
||||||
|
|
||||||
|
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
|
||||||
|
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
|
||||||
|
|
||||||
|
if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
|
||||||
|
counter++;
|
||||||
|
ImGui::SameLine();
|
||||||
|
ImGui::Text("counter = %d", counter);
|
||||||
|
|
||||||
|
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
|
||||||
|
ImGui::End();
|
||||||
|
}
|
||||||
|
|
||||||
|
// 3. Show another simple window.
|
||||||
|
if (show_another_window)
|
||||||
|
{
|
||||||
|
ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
|
||||||
|
ImGui::Text("Hello from another window!");
|
||||||
|
if (ImGui::Button("Close Me"))
|
||||||
|
show_another_window = false;
|
||||||
|
ImGui::End();
|
||||||
|
}
|
||||||
|
|
||||||
|
// Rendering
|
||||||
|
ImGui::Render();
|
||||||
|
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
|
||||||
|
glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
|
||||||
|
glClear(GL_COLOR_BUFFER_BIT);
|
||||||
|
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
|
||||||
|
glXSwapBuffers(display, window);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Cleanup
|
||||||
|
ImGui_ImplOpenGL3_Shutdown();
|
||||||
|
ImGui_ImplXlib_Shutdown();
|
||||||
|
ImGui::DestroyContext();
|
||||||
|
|
||||||
|
glXDestroyContext(display, glx_context);
|
||||||
|
XDestroyWindow(display, window);
|
||||||
|
XFreeColormap(display, window_attribs.colormap);
|
||||||
|
XCloseDisplay(display);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user