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Fixed IsItemHovered() - part of the processing has to be done in ItemAdd() because the widget may alter clipping rectangle temporarily.

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This commit is contained in:
omar 2017-09-28 15:43:26 +02:00
parent fafe65a8fc
commit 0106dcbd02
3 changed files with 14 additions and 7 deletions
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12
imgui.cpp
View File

@ -1952,12 +1952,16 @@ bool ImGui::ItemAdd(const ImRect& bb, const ImGuiID* id)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
const bool is_clipped = IsClippedEx(bb, id, false);
window->DC.LastItemId = id ? *id : 0;
window->DC.LastItemRect = bb;
if (IsClippedEx(bb, id, false))
window->DC.LastItemRectHoveredRect = false;
if (is_clipped)
return false;
//if (g.IO.KeyAlt) window->DrawList->AddRect(bb.Min, bb.Max, IM_COL32(255,255,0,120)); // [DEBUG]
// We need to calculate this now to take account of the current clipping rectangle (as items like Selectable may change them)
window->DC.LastItemRectHoveredRect = IsMouseHoveringRect(bb.Min, bb.Max);
return true;
}
@ -1968,12 +1972,12 @@ bool ImGui::IsItemHovered()
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
if (!window->DC.LastItemRectHoveredRect)
return false;
if (g.HoveredWindow != window)
return false;
if (g.ActiveId != 0 && g.ActiveId != window->DC.LastItemId && !g.ActiveIdAllowOverlap && g.ActiveId != window->MoveId)
return false;
if (!IsMouseHoveringRect(window->DC.LastItemRect.Min, window->DC.LastItemRect.Max))
return false;
if (!IsWindowContentHoverable(window))
return false;
return true;
@ -1982,7 +1986,7 @@ bool ImGui::IsItemHovered()
bool ImGui::IsItemRectHovered()
{
ImGuiWindow* window = GetCurrentWindowRead();
return IsMouseHoveringRect(window->DC.LastItemRect.Min, window->DC.LastItemRect.Max);
return window->DC.LastItemRectHoveredRect;
}
// Internal facing ItemHoverable() used when submitting widgets. Differs slightly from IsItemHovered().

5
imgui_demo.cpp
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@ -1505,7 +1505,7 @@ void ImGui::ShowTestWindow(bool* p_open)
ImGui::Text("ID"); ImGui::NextColumn();
ImGui::Text("Name"); ImGui::NextColumn();
ImGui::Text("Path"); ImGui::NextColumn();
ImGui::Text("Flags"); ImGui::NextColumn();
ImGui::Text("Hovered"); ImGui::NextColumn();
ImGui::Separator();
const char* names[3] = { "One", "Two", "Three" };
const char* paths[3] = { "/path/one", "/path/two", "/path/three" };
@ -1516,10 +1516,11 @@ void ImGui::ShowTestWindow(bool* p_open)
sprintf(label, "%04d", i);
if (ImGui::Selectable(label, selected == i, ImGuiSelectableFlags_SpanAllColumns))
selected = i;
bool hovered = ImGui::IsItemHovered();
ImGui::NextColumn();
ImGui::Text(names[i]); ImGui::NextColumn();
ImGui::Text(paths[i]); ImGui::NextColumn();
ImGui::Text("...."); ImGui::NextColumn();
ImGui::Text("%d", hovered); ImGui::NextColumn();
}
ImGui::Columns(1);
ImGui::Separator();

4
imgui_internal.h
View File

@ -600,6 +600,7 @@ struct IMGUI_API ImGuiDrawContext
int TreeDepth;
ImGuiID LastItemId;
ImRect LastItemRect;
bool LastItemRectHoveredRect;
bool MenuBarAppending;
float MenuBarOffsetX;
ImVector<ImGuiWindow*> ChildWindows;
@ -639,7 +640,8 @@ struct IMGUI_API ImGuiDrawContext
LogLinePosY = -1.0f;
TreeDepth = 0;
LastItemId = 0;
LastItemRect = ImRect(0.0f,0.0f,0.0f,0.0f);
LastItemRect = ImRect();
LastItemRectHoveredRect = false;
MenuBarAppending = false;
MenuBarOffsetX = 0.0f;
StateStorage = NULL;