Minor amend 9028088 (#3261)

docs/CHANGELOG.txt

@@ -64,6 +64,7 @@ Other Changes:
 - Backends: Vulkan: Fixed error in if initial frame has no vertices. (#3177)
 - Backends: Vulkan: Fixed edge case where render callbacks wouldn't be called if the ImDrawData
   structure didn't have any vertices. (#2697) [@kudaba]
+- Backends: OSX: Added workaround to avoid fast mouse clicks. (#3261, #1992, #2525) [@nburrus]
 - Examples: Apple: Fixed example_apple_metal and example_apple_opengl2 using imgui_impl_osx.mm 
   not forwarding right and center mouse clicks. (#3260) [@nburrus]
 

examples/imgui_impl_glfw.cpp

@@ -68,7 +68,7 @@ enum GlfwClientApi
 static GLFWwindow*          g_Window = NULL;    // Main window
 static GlfwClientApi        g_ClientApi = GlfwClientApi_Unknown;
 static double               g_Time = 0.0;
-static bool                 g_MouseJustPressed[5] = { false, false, false, false, false };
+static bool                 g_MouseJustPressed[ImGuiMouseButton_COUNT] = {};
 static GLFWcursor*          g_MouseCursors[ImGuiMouseCursor_COUNT] = {};
 static bool                 g_InstalledCallbacks = false;
 

examples/imgui_impl_osx.mm

@@ -28,8 +28,8 @@
 static CFAbsoluteTime g_Time = 0.0;
 static NSCursor*      g_MouseCursors[ImGuiMouseCursor_COUNT] = {};
 static bool           g_MouseCursorHidden = false;
-static bool           g_MouseJustPressed[5] = { false, false, false, false, false };
+static bool           g_MouseJustPressed[ImGuiMouseButton_COUNT] = {};
-static bool           g_MouseDown[5] = { false, false, false, false, false };
+static bool           g_MouseDown[ImGuiMouseButton_COUNT] = {};
 
 // Undocumented methods for creating cursors.
 @interface NSCursor()
@@ -126,9 +126,9 @@ void ImGui_ImplOSX_Shutdown()
 
 static void ImGui_ImplOSX_UpdateMouseCursorAndButtons()
 {
+    // Update buttons
     ImGuiIO& io = ImGui::GetIO();
-
+    for (int i = 0; i < IM_ARRAYSIZE(io.MouseDown); i++)
-    for (int i = 0; i < IM_ARRAYSIZE(io.MouseDown) && i < IM_ARRAYSIZE(g_MouseJustPressed); i++)
     {
         // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
         io.MouseDown[i] = g_MouseJustPressed[i] || g_MouseDown[i];
@@ -208,11 +208,8 @@ bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view)
     if (event.type == NSEventTypeLeftMouseDown || event.type == NSEventTypeRightMouseDown || event.type == NSEventTypeOtherMouseDown)
     {
         int button = (int)[event buttonNumber];
-        if (button >= 0 && button < IM_ARRAYSIZE(g_MouseJustPressed))
+        if (button >= 0 && button < IM_ARRAYSIZE(g_MouseDown))
-        {
+            g_MouseDown[button] = g_MouseJustPressed[button] = true;
-            g_MouseJustPressed[button] = true;
-            g_MouseDown[button] = true;
-        }
         return io.WantCaptureMouse;
     }
 

imgui.h

@@ -1488,7 +1488,7 @@ struct ImGuiIO
     //------------------------------------------------------------------
 
     ImVec2      MousePos;                       // Mouse position, in pixels. Set to ImVec2(-FLT_MAX,-FLT_MAX) if mouse is unavailable (on another screen, etc.)
-    bool        MouseDown[5];                   // Mouse buttons: 0=left, 1=right, 2=middle + extras. ImGui itself mostly only uses left button (BeginPopupContext** are using right button). Others buttons allows us to track if the mouse is being used by your application + available to user as a convenience via IsMouse** API.
+    bool        MouseDown[5];                   // Mouse buttons: 0=left, 1=right, 2=middle + extras (ImGuiMouseButton_COUNT == 5). Dear ImGui mostly uses left and right buttons. Others buttons allows us to track if the mouse is being used by your application + available to user as a convenience via IsMouse** API.
     float       MouseWheel;                     // Mouse wheel Vertical: 1 unit scrolls about 5 lines text.
     float       MouseWheelH;                    // Mouse wheel Horizontal. Most users don't have a mouse with an horizontal wheel, may not be filled by all back-ends.
     bool        KeyCtrl;                        // Keyboard modifier pressed: Control