Internals: added ImRect::ContainsWithPad()

imgui.cpp

@@ -5212,12 +5212,8 @@ static void FindHoveredWindow()
             continue;
 
         // Using the clipped AABB, a child window will typically be clipped by its parent (not always)
-        ImRect bb(window->OuterRectClipped);
-        if (window->Flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_AlwaysAutoResize))
-            bb.Expand(padding_regular);
-        else
-            bb.Expand(padding_for_resize);
-        if (!bb.Contains(g.IO.MousePos))
+        ImVec2 hit_padding = (window->Flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_AlwaysAutoResize)) ? padding_regular : padding_for_resize;
+        if (!window->OuterRectClipped.ContainsWithPad(g.IO.MousePos, hit_padding))
             continue;
 
         // Support for one rectangular hole in any given window
@@ -8387,9 +8383,8 @@ bool ImGui::IsMouseHoveringRect(const ImVec2& r_min, const ImVec2& r_max, bool c
     if (clip)
         rect_clipped.ClipWith(g.CurrentWindow->ClipRect);
 
-    // Expand for touch input
-    const ImRect rect_for_touch(rect_clipped.Min - g.Style.TouchExtraPadding, rect_clipped.Max + g.Style.TouchExtraPadding);
-    if (!rect_for_touch.Contains(g.IO.MousePos))
+    // Hit testing, expanded for touch input
+    if (!rect_clipped.ContainsWithPad(g.IO.MousePos, g.Style.TouchExtraPadding))
         return false;
     return true;
 }

imgui_internal.h

@@ -544,6 +544,7 @@ struct IMGUI_API ImRect
     ImVec2      GetBR() const                       { return Max; }                   // Bottom-right
     bool        Contains(const ImVec2& p) const     { return p.x     >= Min.x && p.y     >= Min.y && p.x     <  Max.x && p.y     <  Max.y; }
     bool        Contains(const ImRect& r) const     { return r.Min.x >= Min.x && r.Min.y >= Min.y && r.Max.x <= Max.x && r.Max.y <= Max.y; }
+    bool        ContainsWithPad(const ImVec2& p, const ImVec2& pad) const { return p.x >= Min.x - pad.x && p.y >= Min.y - pad.y && p.x < Max.x + pad.x && p.y < Max.y + pad.y; }
     bool        Overlaps(const ImRect& r) const     { return r.Min.y <  Max.y && r.Max.y >  Min.y && r.Min.x <  Max.x && r.Max.x >  Min.x; }
     void        Add(const ImVec2& p)                { if (Min.x > p.x)     Min.x = p.x;     if (Min.y > p.y)     Min.y = p.y;     if (Max.x < p.x)     Max.x = p.x;     if (Max.y < p.y)     Max.y = p.y; }
     void        Add(const ImRect& r)                { if (Min.x > r.Min.x) Min.x = r.Min.x; if (Min.y > r.Min.y) Min.y = r.Min.y; if (Max.x < r.Max.x) Max.x = r.Max.x; if (Max.y < r.Max.y) Max.y = r.Max.y; }