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imgui/imgui.h

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// ImGui library
// See .cpp file for commentary.
// See ImGui::ShowTestWindow() for sample code.
// Read 'Programmer guide' in .cpp for notes on how to setup ImGui in your codebase.
// Get latest version at https://github.com/ocornut/imgui
#pragma once
struct ImDrawList;
struct ImBitmapFont;
struct ImGuiAabb;
struct ImGuiIO;
struct ImGuiStorage;
struct ImGuiStyle;
struct ImGuiWindow;
#include "imconfig.h"
#include <float.h> // FLT_MAX
#include <stdarg.h> // va_list
#include <stdlib.h> // NULL
#ifndef IM_ASSERT
#include <assert.h>
#define IM_ASSERT(_EXPR) assert(_EXPR)
#endif
typedef unsigned int ImU32;
typedef ImU32 ImGuiID;
typedef int ImGuiCol; // enum ImGuiCol_
typedef int ImGuiKey; // enum ImGuiKey_
typedef int ImGuiColorEditMode; // enum ImGuiColorEditMode_
typedef int ImGuiWindowFlags; // enum ImGuiWindowFlags_
typedef int ImGuiInputTextFlags; // enum ImGuiInputTextFlags_
typedef ImBitmapFont* ImFont;
struct ImVec2
{
float x, y;
ImVec2() {}
ImVec2(float _x, float _y) { x = _x; y = _y; }
#ifdef IM_VEC2_CLASS_EXTRA
IM_VEC2_CLASS_EXTRA
#endif
};
struct ImVec4
{
float x, y, z, w;
ImVec4() {}
ImVec4(float _x, float _y, float _z, float _w) { x = _x; y = _y; z = _z; w = _w; }
#ifdef IM_VEC4_CLASS_EXTRA
IM_VEC4_CLASS_EXTRA
#endif
};
// std::vector<> like class to avoid dragging dependencies (also: windows implementation of STL with debug enabled is absurdly slow, so let's bypass it so our code runs fast in debug).
// this implementation does NOT call c++ constructors! we don't need them! also only provide the minimum functionalities we need.
#ifndef ImVector
template<typename T>
class ImVector
{
private:
size_t Size;
size_t Capacity;
T* Data;
public:
typedef T value_type;
typedef value_type* iterator;
typedef const value_type* const_iterator;
ImVector() { Size = Capacity = 0; Data = NULL; }
~ImVector() { if (Data) free(Data); }
inline bool empty() const { return Size == 0; }
inline size_t size() const { return Size; }
inline size_t capacity() const { return Capacity; }
inline value_type& at(size_t i) { IM_ASSERT(i < Size); return Data[i]; }
inline const value_type& at(size_t i) const { IM_ASSERT(i < Size); return Data[i]; }
inline value_type& operator[](size_t i) { IM_ASSERT(i < Size); return Data[i]; }
inline const value_type& operator[](size_t i) const { IM_ASSERT(i < Size); return Data[i]; }
inline void clear() { if (Data) { Size = Capacity = 0; free(Data); Data = NULL; } }
inline iterator begin() { return Data; }
inline const_iterator begin() const { return Data; }
inline iterator end() { return Data + Size; }
inline const_iterator end() const { return Data + Size; }
inline value_type& front() { return at(0); }
inline const value_type& front() const { return at(0); }
inline value_type& back() { IM_ASSERT(Size > 0); return at(Size-1); }
inline const value_type& back() const { IM_ASSERT(Size > 0); return at(Size-1); }
inline void swap(ImVector<T>& rhs) { const size_t rhs_size = rhs.Size; rhs.Size = Size; Size = rhs_size; const size_t rhs_cap = rhs.Capacity; rhs.Capacity = Capacity; Capacity = rhs_cap; value_type* rhs_data = rhs.Data; rhs.Data = Data; Data = rhs_data; }
inline void reserve(size_t new_capacity) { Data = (value_type*)realloc(Data, new_capacity * sizeof(value_type)); Capacity = new_capacity; }
inline void resize(size_t new_size) { if (new_size > Capacity) reserve(new_size); Size = new_size; }
inline void push_back(const value_type& v) { if (Size == Capacity) reserve(Capacity ? Capacity * 2 : 4); Data[Size++] = v; }
inline void pop_back() { IM_ASSERT(Size > 0); Size--; }
inline iterator erase(const_iterator it) { IM_ASSERT(it >= begin() && it < end()); const int off = it - begin(); memmove(Data + off, Data + off + 1, (Size - off - 1) * sizeof(value_type)); Size--; return Data + off; }
inline void insert(const_iterator it, const value_type& v) { IM_ASSERT(it >= begin() && it <= end()); const int off = it - begin(); if (Size == Capacity) reserve(Capacity ? Capacity * 2 : 4); if (off < (int)Size) memmove(Data + off + 1, Data + off, (Size - off) * sizeof(value_type)); Data[off] = v; Size++; }
};
#endif // #ifndef ImVector
// Helpers at bottom of the file:
// - if (IMGUI_ONCE_UPON_A_FRAME) // Execute a block of code once per frame only
// - struct ImGuiTextFilter // Parse and apply text filter. In format "aaaaa[,bbbb][,ccccc]"
// - struct ImGuiTextBuffer // Text buffer for logging/accumulating text
// - struct ImGuiStorage // Custom key value storage (if you need to alter open/close states manually)
// - struct ImDrawList // Draw command list
// - struct ImBitmapFont // Bitmap font loader
// ImGui End-user API
// In a namespace so that user can add extra functions (e.g. Value() helpers for your vector or common types)
namespace ImGui
{
// Main
ImGuiIO& GetIO();
ImGuiStyle& GetStyle();
void NewFrame();
void Render();
void Shutdown();
void ShowUserGuide();
void ShowStyleEditor(ImGuiStyle* ref = NULL);
void ShowTestWindow(bool* open = NULL);
// Window
bool Begin(const char* name = "Debug", bool* open = NULL, ImVec2 size = ImVec2(0,0), float fill_alpha = -1.0f, ImGuiWindowFlags flags = 0);
void End();
void BeginChild(const char* str_id, ImVec2 size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0);
void EndChild();
bool GetWindowIsFocused();
float GetWindowWidth();
ImVec2 GetWindowPos(); // you should rarely need/care about the window position, but it can be useful if you want to use your own drawing
void SetWindowPos(const ImVec2& pos); // set current window pos
ImVec2 GetWindowSize();
ImVec2 GetWindowContentRegionMin();
ImVec2 GetWindowContentRegionMax();
ImDrawList* GetWindowDrawList();
void SetFontScale(float scale);
void SetScrollPosHere();
void SetTreeStateStorage(ImGuiStorage* tree);
ImGuiStorage* GetTreeStateStorage();
void PushItemWidth(float item_width);
void PopItemWidth();
float GetItemWidth();
void PushAllowKeyboardFocus(bool v);
void PopAllowKeyboardFocus();
void PushStyleColor(ImGuiCol idx, const ImVec4& col);
void PopStyleColor();
// Tooltip
void SetTooltip(const char* fmt, ...); // set tooltip under mouse-cursor, typically use with ImGui::IsHovered(). last call wins.
void BeginTooltip(); // use to create full-featured tooltip windows that aren't just text.
void EndTooltip();
// Layout
void Separator(); // horizontal line
void SameLine(int column_x = 0, int spacing_w = -1); // call between widgets to layout them horizontally
void Spacing();
void Columns(int count = 1, const char* id = NULL, bool border=true); // setup number of columns
void NextColumn(); // next column
float GetColumnOffset(int column_index = -1);
void SetColumnOffset(int column_index, float offset);
float GetColumnWidth(int column_index = -1);
ImVec2 GetCursorPos(); // cursor position relative to window position
void SetCursorPos(const ImVec2& pos); // "
ImVec2 GetCursorScreenPos(); // cursor position in screen space
void AlignFirstTextHeightToWidgets(); // call once if the first item on the line is a Text() item and you want to vertically lower it to match higher widgets.
float GetTextLineSpacing();
float GetTextLineHeight();
// ID scopes
void PushID(const char* str_id);
void PushID(const void* ptr_id);
void PushID(const int int_id);
void PopID();
// Widgets
void Text(const char* fmt, ...);
void TextV(const char* fmt, va_list args);
void TextColored(const ImVec4& col, const char* fmt, ...); // shortcut to doing PushStyleColor(ImGuiCol_Text, col); Text(fmt, ...); PopStyleColor();
void TextUnformatted(const char* text, const char* text_end = NULL); // doesn't require null terminated string if 'text_end' is specified. no copy done to any bounded stack buffer, better for long chunks of text.
void LabelText(const char* label, const char* fmt, ...);
void BulletText(const char* fmt, ...);
bool Button(const char* label, ImVec2 size = ImVec2(0,0), bool repeat_when_held = false);
bool SmallButton(const char* label);
bool CollapsingHeader(const char* label, const char* str_id = NULL, const bool display_frame = true, const bool default_open = false);
bool SliderFloat(const char* label, float* v, float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
bool SliderFloat2(const char* label, float v[2], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
bool SliderFloat3(const char* label, float v[3], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
bool SliderFloat4(const char* label, float v[3], float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
bool SliderAngle(const char* label, float* v, float v_degrees_min = -360.0f, float v_degrees_max = +360.0f); // *v in radians
bool SliderInt(const char* label, int* v, int v_min, int v_max, const char* display_format = "%.0f");
void PlotLines(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
void PlotHistogram(const char* label, const float* values, int values_count, int values_offset = 0, const char* overlay_text = NULL, float scale_min = FLT_MAX, float scale_max = FLT_MAX, ImVec2 graph_size = ImVec2(0,0), size_t stride = sizeof(float));
void Checkbox(const char* label, bool* v);
void CheckboxFlags(const char* label, unsigned int* flags, unsigned int flags_value);
bool RadioButton(const char* label, bool active);
bool RadioButton(const char* label, int* v, int v_button);
bool InputFloat(const char* label, float* v, float step = 0.0f, float step_fast = 0.0f, int decimal_precision = -1);
bool InputFloat2(const char* label, float v[2], int decimal_precision = -1);
bool InputFloat3(const char* label, float v[3], int decimal_precision = -1);
bool InputFloat4(const char* label, float v[4], int decimal_precision = -1);
bool InputInt(const char* label, int* v, int step = 1, int step_fast = 100);
bool InputText(const char* label, char* buf, size_t buf_size, ImGuiInputTextFlags flags = 0);
bool Combo(const char* label, int* current_item, const char** items, int items_count, int popup_height_items = 7);
bool Combo(const char* label, int* current_item, const char* items_separated_by_zeros, int popup_height_items = 7); // Separate items with \0, end item-list with \0\0
bool Combo(const char* label, int* current_item, bool (*items_getter)(void* data, int idx, const char** out_text), void* data, int items_count, int popup_height_items = 7);
bool ColorButton(const ImVec4& col, bool small_height = false, bool outline_border = true);
bool ColorEdit3(const char* label, float col[3]);
bool ColorEdit4(const char* label, float col[4], bool show_alpha = true);
void ColorEditMode(ImGuiColorEditMode mode);
bool TreeNode(const char* str_label_id); // if returning 'true' the user is responsible for calling TreePop
bool TreeNode(const char* str_id, const char* fmt, ...); // "
bool TreeNode(const void* ptr_id, const char* fmt, ...); // "
void TreePush(const char* str_id = NULL); // already called by TreeNode(), but you can call Push/Pop yourself for layout purpose
void TreePush(const void* ptr_id = NULL); // "
void TreePop();
void OpenNextNode(bool open); // force open/close the next TreeNode or CollapsingHeader
// Value helper output "name: value"
// Freely declare your own in the ImGui namespace.
void Value(const char* prefix, bool b);
void Value(const char* prefix, int v);
void Value(const char* prefix, unsigned int v);
void Value(const char* prefix, float v, const char* float_format = NULL);
void Color(const char* prefix, const ImVec4& v);
void Color(const char* prefix, unsigned int v);
// Logging
void LogButtons();
void LogToTTY(int max_depth = -1);
void LogToFile(int max_depth = -1, const char* filename = NULL);
void LogToClipboard(int max_depth = -1);
// Utilities
void SetNewWindowDefaultPos(const ImVec2& pos); // set position of window that do
bool IsHovered(); // was the last item active area hovered by mouse?
ImVec2 GetItemBoxMin(); // get bounding box of last item
ImVec2 GetItemBoxMax(); // get bounding box of last item
bool IsClipped(const ImVec2& item_size); // to perform coarse clipping on user's side (as an optimisation)
bool IsKeyPressed(int key_index, bool repeat = true); // key_index into the keys_down[512] array, imgui doesn't know the semantic of each entry
bool IsMouseClicked(int button, bool repeat = false);
bool IsMouseDoubleClicked(int button);
bool IsMouseHoveringBox(const ImVec2& box_min, const ImVec2& box_max);
ImVec2 GetMousePos();
float GetTime();
int GetFrameCount();
const char* GetStyleColorName(ImGuiCol idx);
void GetDefaultFontData(const void** fnt_data, unsigned int* fnt_size, const void** png_data, unsigned int* png_size);
ImVec2 CalcTextSize(const char* text, const char* text_end = NULL, const bool hide_text_after_hash = true);
}; // namespace ImGui
// Flags for ImGui::Begin()
enum ImGuiWindowFlags_
{
// Default: 0
ImGuiWindowFlags_ShowBorders = 1 << 0,
ImGuiWindowFlags_NoTitleBar = 1 << 1,
ImGuiWindowFlags_NoResize = 1 << 2,
ImGuiWindowFlags_NoMove = 1 << 3,
ImGuiWindowFlags_NoScrollbar = 1 << 4,
ImGuiWindowFlags_ChildWindow = 1 << 5, // For internal use by BeginChild()
ImGuiWindowFlags_ChildWindowAutoFitX = 1 << 6, // For internal use by BeginChild()
ImGuiWindowFlags_ChildWindowAutoFitY = 1 << 7, // For internal use by BeginChild()
ImGuiWindowFlags_ComboBox = 1 << 8, // For internal use by ComboBox()
ImGuiWindowFlags_Tooltip = 1 << 9, // For internal use by Render() when using Tooltip
};
// Flags for ImGui::InputText()
enum ImGuiInputTextFlags_
{
// Default: 0
ImGuiInputTextFlags_CharsDecimal = 1 << 0,
ImGuiInputTextFlags_CharsHexadecimal = 1 << 1,
ImGuiInputTextFlags_AutoSelectAll = 1 << 2,
ImGuiInputTextFlags_AlignCenter = 1 << 3,
};
// User fill ImGuiIO.KeyMap[] array with indices into the ImGuiIO.KeysDown[512] array
enum ImGuiKey_
{
ImGuiKey_Tab,
ImGuiKey_LeftArrow,
ImGuiKey_RightArrow,
ImGuiKey_UpArrow,
ImGuiKey_DownArrow,
ImGuiKey_Home,
ImGuiKey_End,
ImGuiKey_Delete,
ImGuiKey_Backspace,
ImGuiKey_Enter,
ImGuiKey_Escape,
ImGuiKey_A, // for CTRL+A: select all
ImGuiKey_C, // for CTRL+C: copy
ImGuiKey_V, // for CTRL+V: paste
ImGuiKey_X, // for CTRL+X: cut
ImGuiKey_Y, // for CTRL+Y: redo
ImGuiKey_Z, // for CTRL+Z: undo
ImGuiKey_COUNT,
};
enum ImGuiCol_
{
ImGuiCol_Text,
ImGuiCol_WindowBg,
ImGuiCol_Border,
ImGuiCol_BorderShadow,
ImGuiCol_FrameBg, // Background of checkbox, radio button, plot, slider, text input
ImGuiCol_TitleBg,
ImGuiCol_TitleBgCollapsed,
ImGuiCol_ScrollbarBg,
ImGuiCol_ScrollbarGrab,
ImGuiCol_ScrollbarGrabHovered,
ImGuiCol_ScrollbarGrabActive,
ImGuiCol_ComboBg,
ImGuiCol_CheckHovered,
ImGuiCol_CheckActive,
ImGuiCol_SliderGrab,
ImGuiCol_SliderGrabActive,
ImGuiCol_Button,
ImGuiCol_ButtonHovered,
ImGuiCol_ButtonActive,
ImGuiCol_Header,
ImGuiCol_HeaderHovered,
ImGuiCol_HeaderActive,
ImGuiCol_Column,
ImGuiCol_ColumnHovered,
ImGuiCol_ColumnActive,
ImGuiCol_ResizeGrip,
ImGuiCol_ResizeGripHovered,
ImGuiCol_ResizeGripActive,
ImGuiCol_CloseButton,
ImGuiCol_CloseButtonHovered,
ImGuiCol_CloseButtonActive,
ImGuiCol_PlotLines,
ImGuiCol_PlotLinesHovered,
ImGuiCol_PlotHistogram,
ImGuiCol_PlotHistogramHovered,
ImGuiCol_TextSelectedBg,
ImGuiCol_TooltipBg,
ImGuiCol_COUNT,
};
enum ImGuiColorEditMode_
{
ImGuiColorEditMode_UserSelect = -1,
ImGuiColorEditMode_RGB = 0,
ImGuiColorEditMode_HSV = 1,
ImGuiColorEditMode_HEX = 2,
};
struct ImGuiStyle
{
float Alpha; // Global alpha applies to everything in ImGui
ImVec2 WindowPadding; // Padding within a window
ImVec2 WindowMinSize; // Minimum window size
ImVec2 FramePadding; // Padding within a framed rectangle (used by most widgets)
ImVec2 ItemSpacing; // Horizontal and vertical spacing between widgets/lines
ImVec2 ItemInnerSpacing; // Horizontal and vertical spacing between within elements of a composed widget (e.g. a slider and its label)
ImVec2 TouchExtraPadding; // Expand bounding box for touch-based system where touch position is not accurate enough (unnecessary for mouse inputs). Unfortunately we don't sort widgets so priority on overlap will always be given to the first widget running. So dont grow this too much!
ImVec2 AutoFitPadding; // Extra space after auto-fit (double-clicking on resize grip)
float WindowFillAlphaDefault; // Default alpha of window background, if not specified in ImGui::Begin()
float WindowRounding; // Radius of window corners rounding. Set to 0.0f to have rectangular windows
float TreeNodeSpacing; // Horizontal spacing when entering a tree node
float ColumnsMinSpacing; // Minimum horizontal spacing between two columns
float ScrollBarWidth; // Width of the vertical scroll bar
ImVec4 Colors[ImGuiCol_COUNT];
ImGuiStyle();
};
// This is where your app communicate with ImGui. Call ImGui::GetIO() to access.
// Read 'Programmer guide' section in .cpp file for general usage.
struct ImGuiIO
{
// Settings (fill once) // Default value:
ImVec2 DisplaySize; // <unset> // Display size, in pixels. For clamping windows positions.
float DeltaTime; // = 1.0f/60.0f // Time elapsed since last frame, in seconds.
float IniSavingRate; // = 5.0f // Maximum time between saving .ini file, in seconds. Set to a negative value to disable .ini saving.
const char* IniFilename; // = "imgui.ini" // Absolute path to .ini file.
const char* LogFilename; // = "imgui_log.txt" // Absolute path to .log file.
float MouseDoubleClickTime; // = 0.30f // Time for a double-click, in seconds.
float MouseDoubleClickMaxDist; // = 6.0f // Distance threshold to stay in to validate a double-click, in pixels.
int KeyMap[ImGuiKey_COUNT]; // <unset> // Map of indices into the KeysDown[512] entries array
ImFont Font; // <auto> // Gets passed to text functions. Typedef ImFont to the type you want (ImBitmapFont* or your own font).
float FontHeight; // <auto> // Default font height, must be the vertical distance between two lines of text, aka == CalcTextSize(" ").y
bool FontAllowScaling; // = false // Set to allow scaling text with CTRL+Wheel.
float PixelCenterOffset; // = 0.5f // Set to 0.0f for DirectX <= 9, 0.5f for Direct3D >= 10 and OpenGL.
// Settings - Rendering function (REQUIRED)
// See example code if you are unsure of how to implement this.
void (*RenderDrawListsFn)(ImDrawList** const draw_lists, int count);
// Settings - Clipboard Support
// Override to provide your clipboard handlers.
// On Windows architecture, defaults to use the native Win32 clipboard, otherwise default to use a ImGui private clipboard.
// NB- for SetClipboardTextFn, the string is *NOT* zero-terminated at 'text_end'
const char* (*GetClipboardTextFn)();
void (*SetClipboardTextFn)(const char* text, const char* text_end);
// Input - Fill before calling NewFrame()
ImVec2 MousePos; // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
bool MouseDown[5]; // Mouse buttons. ImGui itself only uses button 0 (left button) but you can use others as storage for convenience.
int MouseWheel; // Mouse wheel: -1,0,+1
bool KeyCtrl; // Keyboard modifier pressed: Control
bool KeyShift; // Keyboard modifier pressed: Shift
bool KeysDown[512]; // Keyboard keys that are pressed (in whatever order user naturally has access to keyboard data)
char InputCharacters[16]; // List of characters input (translated by user from keypress+keyboard state). Fill using AddInputCharacter() helper.
// Output - Retrieve after calling NewFrame(), you can use them to discard inputs or hide them from the rest of your application
bool WantCaptureMouse; // ImGui is using your mouse input (= window is being hovered or widget is active).
bool WantCaptureKeyboard; // imGui is using your keyboard input (= widget is active).
// Function
void AddInputCharacter(char c); // Helper to add a new character into InputCharacters[]
// [Internal] ImGui will maintain those fields for you
ImVec2 MousePosPrev;
ImVec2 MouseDelta;
bool MouseClicked[5];
ImVec2 MouseClickedPos[5];
float MouseClickedTime[5];
bool MouseDoubleClicked[5];
float MouseDownTime[5];
float KeysDownTime[512];
ImGuiIO();
};
//-----------------------------------------------------------------------------
// Helpers
//-----------------------------------------------------------------------------
// Helper: execute a block of code once a frame only
// Usage: if (IMGUI_ONCE_UPON_A_FRAME) {/*do something once a frame*/)
#define IMGUI_ONCE_UPON_A_FRAME static ImGuiOncePerFrame im = ImGuiOncePerFrame()
struct ImGuiOncePerFrame
{
ImGuiOncePerFrame() : LastFrame(-1) {}
operator bool() const { return TryIsNewFrame(); }
private:
mutable int LastFrame;
bool TryIsNewFrame() const { const int current_frame = ImGui::GetFrameCount(); if (LastFrame == current_frame) return false; LastFrame = current_frame; return true; }
};
// Helper: Parse and apply text filter. In format "aaaaa[,bbbb][,ccccc]"
struct ImGuiTextFilter
{
struct TextRange
{
const char* b;
const char* e;
TextRange() { b = e = NULL; }
TextRange(const char* _b, const char* _e) { b = _b; e = _e; }
const char* begin() const { return b; }
const char* end() const { return e; }
bool empty() const { return b == e; }
char front() const { return *b; }
static bool isblank(char c) { return c == ' ' && c == '\t'; }
void trim_blanks() { while (b < e && isblank(*b)) b++; while (e > b && isblank(*(e-1))) e--; }
void split(char separator, ImVector<TextRange>& out);
};
char InputBuf[256];
ImVector<TextRange> Filters;
int CountGrep;
ImGuiTextFilter();
void Clear() { InputBuf[0] = 0; Build(); }
void Draw(const char* label = "Filter (inc,-exc)", float width = -1.0f); // Helper calling InputText+Build
bool PassFilter(const char* val) const;
bool IsActive() const { return !Filters.empty(); }
void Build();
};
// Helper: Text buffer for logging/accumulating text
struct ImGuiTextBuffer
{
ImVector<char> Buf;
ImGuiTextBuffer() { Buf.push_back(0); }
const char* begin() const { return Buf.begin(); }
const char* end() const { return Buf.end()-1; }
size_t size() const { return Buf.size()-1; }
bool empty() { return Buf.empty(); }
void clear() { Buf.clear(); Buf.push_back(0); }
void append(const char* fmt, ...);
};
// Helper: Key->value storage
// - Store collapse state for a tree
// - Store color edit options, etc.
// Typically you don't have to worry about this since a storage is held within each Window.
// Declare your own storage if you want to manipulate the open/close state of a particular sub-tree in your interface.
struct ImGuiStorage
{
struct Pair { ImU32 key; int val; };
ImVector<Pair> Data;
void Clear();
int GetInt(ImU32 key, int default_val = 0);
void SetInt(ImU32 key, int val);
void SetAllInt(int val);
int* Find(ImU32 key);
void Insert(ImU32 key, int val);
};
//-----------------------------------------------------------------------------
// Draw List
// Hold a series of drawing commands. The user provide a renderer for ImDrawList
//-----------------------------------------------------------------------------
struct ImDrawCmd
{
unsigned int vtx_count;
ImVec4 clip_rect;
};
#ifndef IMGUI_FONT_TEX_UV_FOR_WHITE
#define IMGUI_FONT_TEX_UV_FOR_WHITE ImVec2(0.f,0.f)
#endif
// sizeof() == 20
struct ImDrawVert
{
ImVec2 pos;
ImVec2 uv;
ImU32 col;
};
// Draw command list
// User is responsible for providing a renderer for this in ImGuiIO::RenderDrawListFn
struct ImDrawList
{
// This is what you have to render
ImVector<ImDrawCmd> commands; // commands
ImVector<ImDrawVert> vtx_buffer; // each command consume ImDrawCmd::vtx_count of those
// [Internal to ImGui]
ImVector<ImVec4> clip_rect_stack; // [internal] clip rect stack while building the command-list (so text command can perform clipping early on)
ImDrawVert* vtx_write; // [internal] point within vtx_buffer after each add command (to avoid using the ImVector<> operators too much)
ImDrawList() { Clear(); }
void Clear();
void PushClipRect(const ImVec4& clip_rect);
void PopClipRect();
void ReserveVertices(unsigned int vtx_count);
void AddVtx(const ImVec2& pos, ImU32 col);
void AddVtxLine(const ImVec2& a, const ImVec2& b, ImU32 col);
// Primitives
void AddLine(const ImVec2& a, const ImVec2& b, ImU32 col);
void AddRect(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
void AddRectFilled(const ImVec2& a, const ImVec2& b, ImU32 col, float rounding = 0.0f, int rounding_corners=0x0F);
void AddTriangleFilled(const ImVec2& a, const ImVec2& b, const ImVec2& c, ImU32 col);
void AddCircle(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
void AddCircleFilled(const ImVec2& centre, float radius, ImU32 col, int num_segments = 12);
void AddArc(const ImVec2& center, float rad, ImU32 col, int a_min, int a_max, bool tris=false, const ImVec2& third_point_offset = ImVec2(0,0));
void AddText(ImFont font, float font_size, const ImVec2& pos, ImU32 col, const char* text_begin, const char* text_end);
};
// Optional bitmap font data loader & renderer into vertices
// #define ImFont to ImBitmapFont to use
// Using the .fnt format exported by BMFont
// - tool: http://www.angelcode.com/products/bmfont
// - file-format: http://www.angelcode.com/products/bmfont/doc/file_format.html
// Assume valid file data (won't handle invalid/malicious data)
// Handle a subset of parameters.
// - kerning pair are not supported (because ImGui code does per-character CalcTextSize calls, need to turn it into something more stateful to allow kerning)
struct ImBitmapFont
{
#pragma pack(push, 1)
struct FntInfo
{
signed short FontSize;
unsigned char BitField; // bit 0: smooth, bit 1: unicode, bit 2: italic, bit 3: bold, bit 4: fixedHeight, bits 5-7: reserved
unsigned char CharSet;
unsigned short StretchH;
unsigned char AA;
unsigned char PaddingUp, PaddingRight, PaddingDown, PaddingLeft;
unsigned char SpacingHoriz, SpacingVert;
unsigned char Outline;
//char FontName[];
};
struct FntCommon
{
unsigned short LineHeight;
unsigned short Base;
unsigned short ScaleW, ScaleH;
unsigned short Pages;
unsigned char BitField;
unsigned char Channels[4];
};
struct FntGlyph
{
unsigned int Id;
unsigned short X, Y;
unsigned short Width, Height;
signed short XOffset, YOffset;
signed short XAdvance;
unsigned char Page;
unsigned char Channel;
};
struct FntKerning
{
unsigned int IdFirst;
unsigned int IdSecond;
signed short Amount;
};
#pragma pack(pop)
unsigned char* Data; // Raw data, content of .fnt file
size_t DataSize; //
bool DataOwned; //
const FntInfo* Info; // (point into raw data)
const FntCommon* Common; // (point into raw data)
const FntGlyph* Glyphs; // (point into raw data)
size_t GlyphsCount; //
const FntKerning* Kerning; // (point into raw data)
size_t KerningCount; //
int TabCount; // FIXME: mishandled (add fixed amount instead of aligning to column)
ImVector<const char*> Filenames; // (point into raw data)
ImVector<int> IndexLookup; // (built)
ImBitmapFont();
~ImBitmapFont() { Clear(); }
bool LoadFromMemory(const void* data, size_t data_size);
bool LoadFromFile(const char* filename);
void Clear();
void BuildLookupTable();
const FntGlyph * FindGlyph(unsigned short c) const;
float GetFontSize() const { return (float)Info->FontSize; }
ImVec2 CalcTextSize(float size, float max_width, const char* text_begin, const char* text_end, const char** remaining = NULL) const;
void RenderText(float size, ImVec2 pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, ImDrawVert*& out_vertices) const;
};
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