From 1ac4f33736d5122f7dcb1a20433d22bd21378d77 Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Sun, 15 Mar 2015 01:58:14 +0000
Subject: [PATCH] Added VSliderFloat()

---
 imgui.cpp | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 imgui.h   |  1 +
 2 files changed, 82 insertions(+)

diff --git a/imgui.cpp b/imgui.cpp
index 4a85f59f8..53b24a1a4 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -4947,6 +4947,56 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c
     return value_changed;
 }
 
+bool ImGui::VSliderFloat(const char* label, const ImVec2& size, float* v, float v_min, float v_max, const char* display_format, float power)
+{
+    ImGuiState& g = *GImGui;
+    ImGuiWindow* window = GetCurrentWindow();
+    if (window->SkipItems)
+        return false;
+
+    const ImGuiStyle& style = g.Style;
+    const ImGuiID id = window->GetID(label);
+
+    const ImVec2 label_size = CalcTextSize(label, NULL, true);
+    const ImGuiAabb frame_bb(window->DC.CursorPos, window->DC.CursorPos + size);
+    const ImGuiAabb slider_bb(frame_bb.Min + style.FramePadding, frame_bb.Max - style.FramePadding);
+    const ImGuiAabb bb(frame_bb.Min, frame_bb.Max + ImVec2(label_size.x > 0.0f ? style.ItemInnerSpacing.x + label_size.x : 0.0f, 0.0f));
+
+    ItemSize(bb);
+    if (!ItemAdd(frame_bb, &id))
+        return false;
+
+    const bool hovered = IsHovered(frame_bb, id);
+    if (hovered)
+        g.HoveredId = id;
+
+    if (!display_format)
+        display_format = "%.3f";
+    int decimal_precision = 3;
+    ParseFormat(display_format, decimal_precision);
+
+    if (hovered && g.IO.MouseClicked[0])
+    {
+        SetActiveId(id);
+        FocusWindow(window);
+    }
+
+    // Actual slider behavior + render grab
+    bool value_changed = SliderBehavior(frame_bb, slider_bb, id, v, v_min, v_max, power, decimal_precision, false);
+
+    // Display value using user-provided display format so user can add prefix/suffix/decorations to the value.
+    // For the vertical slider we allow centered text to overlap the frame padding
+    char value_buf[64];
+    char* value_buf_end = value_buf + ImFormatString(value_buf, IM_ARRAYSIZE(value_buf), display_format, *v);
+    const ImVec2 value_text_size = CalcTextSize(value_buf, value_buf_end, true);
+    RenderTextClipped(ImVec2(ImMax(frame_bb.Min.x, slider_bb.GetCenter().x - value_text_size.x*0.5f), frame_bb.Min.y + style.FramePadding.y), value_buf, value_buf_end, &value_text_size, frame_bb.Max);
+
+    if (label_size.x > 0.0f)
+        RenderText(ImVec2(frame_bb.Max.x + style.ItemInnerSpacing.x, slider_bb.Min.y), label);
+
+    return value_changed;
+}
+
 bool ImGui::SliderAngle(const char* label, float* v, float v_degrees_min, float v_degrees_max)
 {
     float v_deg = *v * 360.0f / (2*PI);
@@ -9012,6 +9062,37 @@ void ImGui::ShowTestWindow(bool* opened)
         //ImGui::PushItemWidth(-1);
         //ImGui::ListBox("##listbox2", &listbox_item_current2, listbox_items, IM_ARRAYSIZE(listbox_items), 4);
         //ImGui::PopItemWidth();
+
+        if (ImGui::TreeNode("Vertical Sliders"))
+        {
+            const int spacing = 4;
+
+            ImGui::PushID("set1");
+            static float values[4] = { 0.0f, 0.60f, 0.35f, 0.9f };
+            for (size_t i = 0; i < IM_ARRAYSIZE(values); i++)
+            {
+                if (i > 0) ImGui::SameLine(0, spacing);
+                ImGui::PushID(i);
+                ImGui::VSliderFloat("##v", ImVec2(18,160), &values[i], 0.0f, 1.0f, "");
+                ImGui::PopID();
+            }
+            ImGui::PopID();
+
+            ImGui::SameLine();
+            ImGui::PushID("set2");
+            ImGui::PushStyleVar(ImGuiStyleVar_GrabMinSize, 40);
+            for (size_t i = 0; i < IM_ARRAYSIZE(values); i++)
+            {
+                if (i > 0) ImGui::SameLine(0, spacing);
+                ImGui::PushID(i);
+                ImGui::VSliderFloat("##v", ImVec2(40,160), &values[i], 0.0f, 1.0f, "%.2f");
+                ImGui::PopID();
+            }
+            ImGui::PopStyleVar();
+            ImGui::PopID();
+
+            ImGui::TreePop();
+        }
     }
 
     if (ImGui::CollapsingHeader("Graphs widgets"))
diff --git a/imgui.h b/imgui.h
index f3c51b6de..54b5a90de 100644
--- a/imgui.h
+++ b/imgui.h
@@ -283,6 +283,7 @@ namespace ImGui
     IMGUI_API bool          SliderInt2(const char* label, int v[2], int v_min, int v_max, const char* display_format = "%.0f");
     IMGUI_API bool          SliderInt3(const char* label, int v[3], int v_min, int v_max, const char* display_format = "%.0f");
     IMGUI_API bool          SliderInt4(const char* label, int v[4], int v_min, int v_max, const char* display_format = "%.0f");
+    IMGUI_API bool          VSliderFloat(const char* label, const ImVec2& size, float* v, float v_min, float v_max, const char* display_format = "%.3f", float power = 1.0f);
     IMGUI_API 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));
     IMGUI_API void          PlotLines(const char* label, float (*values_getter)(void* data, int idx), void* data, 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));
     IMGUI_API 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));