Added ArrowButton(). Exposed ImGuiDir.

CHANGELOG.txt

@@ -92,6 +92,7 @@ Other Changes:
 - Window: Added SetNextWindowBgAlpha() helper. Particularly helpul since the legacy 5-parameters version of Begin() has been marked as obsolete in 1.53. (#1567)
 - Window: Fixed SetNextWindowContentSize() with 0.0f on Y axis (or SetNextWindowContentWidth()) overwriting the contents size. Got broken on Dec 10 (1.53). (#1363)
 - Window: CloseButton: Fixed cross positioning being a little off.
+- ArrowButton: Added ArrowButton() given a cardinal direction (e.g. ImGuiDir_Left).
 - InputText: Added alternative clipboard shortcuts: Shift+Delete (cut), Ctrl+Insert (copy), Shift+Insert (paste). (#1541)
 - InputText: Fixed losing Cursor X position when clicking outside on an item that's submitted after the InputText(). It was only noticeable when restoring focus programmatically. (#1418, #1554)
 - Style: Enable window border by default. (#707)

imgui.cpp

@@ -4306,7 +4306,7 @@ void ImGui::RenderArrow(ImVec2 p_min, ImGuiDir dir, float scale)
         c = ImVec2(-0.500f,-0.866f) * r;
         break;
     case ImGuiDir_None: 
-    case ImGuiDir_Count_: 
+    case ImGuiDir_COUNT: 
         IM_ASSERT(0);
         break;
     }
@@ -5200,8 +5200,8 @@ static ImVec2 FindBestWindowPosForPopup(const ImVec2& ref_pos, const ImVec2& siz
     // Combo Box policy (we want a connecting edge)
     if (policy == ImGuiPopupPositionPolicy_ComboBox)
     {
-        const ImGuiDir dir_prefered_order[ImGuiDir_Count_] = { ImGuiDir_Down, ImGuiDir_Right, ImGuiDir_Left, ImGuiDir_Up };
+        const ImGuiDir dir_prefered_order[ImGuiDir_COUNT] = { ImGuiDir_Down, ImGuiDir_Right, ImGuiDir_Left, ImGuiDir_Up };
-        for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_Count_; n++)
+        for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_COUNT; n++)
         {
             const ImGuiDir dir = (n == -1) ? *last_dir : dir_prefered_order[n];
             if (n != -1 && dir == *last_dir) // Already tried this direction?
@@ -5219,8 +5219,8 @@ static ImVec2 FindBestWindowPosForPopup(const ImVec2& ref_pos, const ImVec2& siz
     }
 
     // Default popup policy
-    const ImGuiDir dir_prefered_order[ImGuiDir_Count_] = { ImGuiDir_Right, ImGuiDir_Down, ImGuiDir_Up, ImGuiDir_Left };
+    const ImGuiDir dir_prefered_order[ImGuiDir_COUNT] = { ImGuiDir_Right, ImGuiDir_Down, ImGuiDir_Up, ImGuiDir_Left };
-    for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_Count_; n++)
+    for (int n = (*last_dir != ImGuiDir_None) ? -1 : 0; n < ImGuiDir_COUNT; n++)
     {
         const ImGuiDir dir = (n == -1) ? *last_dir : dir_prefered_order[n];
         if (n != -1 && dir == *last_dir) // Already tried this direction?
@@ -7663,6 +7663,32 @@ bool ImGui::SmallButton(const char* label)
     return pressed;
 }
 
+bool ImGui::ArrowButton(const char* str_id, ImGuiDir dir)
+{
+    ImGuiWindow* window = GetCurrentWindow();
+    if (window->SkipItems)
+        return false;
+
+    ImGuiContext& g = *GImGui;
+    const ImGuiID id = window->GetID(str_id);
+    float sz = ImGui::GetFrameHeight();
+    const ImRect bb(window->DC.CursorPos, window->DC.CursorPos + ImVec2(sz, sz));
+    ItemSize(bb);
+    if (!ItemAdd(bb, id))
+        return false;
+
+    bool hovered, held;
+    bool pressed = ButtonBehavior(bb, id, &hovered, &held);
+
+    // Render
+    const ImU32 col = GetColorU32((hovered && held) ? ImGuiCol_ButtonActive : hovered ? ImGuiCol_ButtonHovered : ImGuiCol_Button);
+    RenderNavHighlight(bb, id);
+    RenderFrame(bb.Min, bb.Max, col, true, g.Style.FrameRounding);
+    RenderArrow(bb.Min + g.Style.FramePadding, dir);
+
+    return pressed;
+}
+
 // Tip: use ImGui::PushID()/PopID() to push indices or pointers in the ID stack.
 // Then you can keep 'str_id' empty or the same for all your buttons (instead of creating a string based on a non-string id)
 bool ImGui::InvisibleButton(const char* str_id, const ImVec2& size_arg)
@@ -11734,7 +11760,7 @@ static void RenderArrow(ImDrawList* draw_list, ImVec2 pos, ImVec2 half_sz, ImGui
     case ImGuiDir_Right: draw_list->AddTriangleFilled(ImVec2(pos.x - half_sz.x, pos.y + half_sz.y), ImVec2(pos.x - half_sz.x, pos.y - half_sz.y), pos, col); return;
     case ImGuiDir_Up:    draw_list->AddTriangleFilled(ImVec2(pos.x + half_sz.x, pos.y + half_sz.y), ImVec2(pos.x - half_sz.x, pos.y + half_sz.y), pos, col); return;
     case ImGuiDir_Down:  draw_list->AddTriangleFilled(ImVec2(pos.x - half_sz.x, pos.y - half_sz.y), ImVec2(pos.x + half_sz.x, pos.y - half_sz.y), pos, col); return;
-    case ImGuiDir_None: case ImGuiDir_Count_: break; // Fix warnings
+    case ImGuiDir_None: case ImGuiDir_COUNT: break; // Fix warnings
     }
 }
 

imgui.h

@@ -78,11 +78,12 @@ struct ImGuiContext;                // ImGui context (opaque)
 typedef void* ImTextureID;          // user data to identify a texture (this is whatever to you want it to be! read the FAQ about ImTextureID in imgui.cpp)
 #endif
 
-// Typedefs and Enumerations (declared as int for compatibility and to not pollute the top of this file)
+// Typedefs and Enumerations (declared as int for compatibility with old C++ and to not pollute the top of this file)
 typedef unsigned int ImU32;         // 32-bit unsigned integer (typically used to store packed colors)
 typedef unsigned int ImGuiID;       // unique ID used by widgets (typically hashed from a stack of string)
 typedef unsigned short ImWchar;     // character for keyboard input/display
 typedef int ImGuiCol;               // enum: a color identifier for styling     // enum ImGuiCol_
+typedef int ImGuiDir;               // enum: a cardinal direction               // enum ImGuiDir_
 typedef int ImGuiCond;              // enum: a condition for Set*()             // enum ImGuiCond_
 typedef int ImGuiKey;               // enum: a key identifier (ImGui-side enum) // enum ImGuiKey_
 typedef int ImGuiNavInput;          // enum: an input identifier for navigation // enum ImGuiNavInput_
@@ -312,6 +313,7 @@ namespace ImGui
     // Widgets: Main
     IMGUI_API bool          Button(const char* label, const ImVec2& size = ImVec2(0,0));            // button
     IMGUI_API bool          SmallButton(const char* label);                                         // button with FramePadding=(0,0) to easily embed within text
+    IMGUI_API bool          ArrowButton(const char* str_id, ImGuiDir dir);
     IMGUI_API bool          InvisibleButton(const char* str_id, const ImVec2& size);                // button behavior without the visuals, useful to build custom behaviors using the public api (along with IsItemActive, IsItemHovered, etc.)
     IMGUI_API void          Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0), const ImVec2& uv1 = ImVec2(1,1), const ImVec4& tint_col = ImVec4(1,1,1,1), const ImVec4& border_col = ImVec4(0,0,0,0));
     IMGUI_API bool          ImageButton(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0,0),  const ImVec2& uv1 = ImVec2(1,1), int frame_padding = -1, const ImVec4& bg_col = ImVec4(0,0,0,0), const ImVec4& tint_col = ImVec4(1,1,1,1));    // <0 frame_padding uses default frame padding settings. 0 for no padding
@@ -687,6 +689,17 @@ enum ImGuiDragDropFlags_
 #define IMGUI_PAYLOAD_TYPE_COLOR_3F     "_COL3F"    // float[3]     // Standard type for colors, without alpha. User code may use this type. 
 #define IMGUI_PAYLOAD_TYPE_COLOR_4F     "_COL4F"    // float[4]     // Standard type for colors. User code may use this type.
 
+// A direction
+enum ImGuiDir_
+{
+    ImGuiDir_None    = -1,
+    ImGuiDir_Left    = 0,
+    ImGuiDir_Right   = 1,
+    ImGuiDir_Up      = 2,
+    ImGuiDir_Down    = 3,
+    ImGuiDir_COUNT
+};
+
 // User fill ImGuiIO.KeyMap[] array with indices into the ImGuiIO.KeysDown[512] array
 enum ImGuiKey_
 {

imgui_demo.cpp

@@ -300,6 +300,12 @@ void ImGui::ShowDemoWindow(bool* p_open)
                 ImGui::PopID();
             }
 
+            // Arrow buttons
+            float spacing = ImGui::GetStyle().ItemInnerSpacing.x;
+            if (ImGui::ArrowButton("##left", ImGuiDir_Left)) {}
+            ImGui::SameLine(0.0f, spacing);
+            if (ImGui::ArrowButton("##left", ImGuiDir_Right)) {}
+
             ImGui::Text("Hover over me");
             if (ImGui::IsItemHovered())
                 ImGui::SetTooltip("I am a tooltip");

imgui_internal.h

@@ -260,16 +260,6 @@ enum ImGuiDataType
     ImGuiDataType_Float2
 };
 
-enum ImGuiDir
-{
-    ImGuiDir_None    = -1,
-    ImGuiDir_Left    = 0,
-    ImGuiDir_Right   = 1,
-    ImGuiDir_Up      = 2,
-    ImGuiDir_Down    = 3,
-    ImGuiDir_Count_
-};
-
 enum ImGuiInputSource
 {
     ImGuiInputSource_None = 0,