Button to close a window
| 796 | |
| 797 | // Button to close a window |
| 798 | bool ImGui::CloseButton(ImGuiID id, const ImVec2& pos) |
| 799 | { |
| 800 | ImGuiContext& g = *GImGui; |
| 801 | ImGuiWindow* window = g.CurrentWindow; |
| 802 | |
| 803 | // Tweak 1: Shrink hit-testing area if button covers an abnormally large proportion of the visible region. That's in order to facilitate moving the window away. (#3825) |
| 804 | // This may better be applied as a general hit-rect reduction mechanism for all widgets to ensure the area to move window is always accessible? |
| 805 | const ImRect bb(pos, pos + ImVec2(g.FontSize, g.FontSize)); |
| 806 | ImRect bb_interact = bb; |
| 807 | const float area_to_visible_ratio = window->OuterRectClipped.GetArea() / bb.GetArea(); |
| 808 | if (area_to_visible_ratio < 1.5f) |
| 809 | bb_interact.Expand(ImFloor(bb_interact.GetSize() * -0.25f)); |
| 810 | |
| 811 | // Tweak 2: We intentionally allow interaction when clipped so that a mechanical Alt,Right,Activate sequence can always close a window. |
| 812 | // (this isn't the common behavior of buttons, but it doesn't affect the user because navigation tends to keep items visible in scrolling layer). |
| 813 | bool is_clipped = !ItemAdd(bb_interact, id); |
| 814 | |
| 815 | bool hovered, held; |
| 816 | bool pressed = ButtonBehavior(bb_interact, id, &hovered, &held); |
| 817 | if (is_clipped) |
| 818 | return pressed; |
| 819 | |
| 820 | // Render |
| 821 | // FIXME: Clarify this mess |
| 822 | ImU32 col = GetColorU32(held ? ImGuiCol_ButtonActive : ImGuiCol_ButtonHovered); |
| 823 | ImVec2 center = bb.GetCenter(); |
| 824 | if (hovered) |
| 825 | window->DrawList->AddCircleFilled(center, ImMax(2.0f, g.FontSize * 0.5f + 1.0f), col); |
| 826 | |
| 827 | float cross_extent = g.FontSize * 0.5f * 0.7071f - 1.0f; |
| 828 | ImU32 cross_col = GetColorU32(ImGuiCol_Text); |
| 829 | center -= ImVec2(0.5f, 0.5f); |
| 830 | window->DrawList->AddLine(center + ImVec2(+cross_extent, +cross_extent), center + ImVec2(-cross_extent, -cross_extent), cross_col, 1.0f); |
| 831 | window->DrawList->AddLine(center + ImVec2(+cross_extent, -cross_extent), center + ImVec2(-cross_extent, +cross_extent), cross_col, 1.0f); |
| 832 | |
| 833 | return pressed; |
| 834 | } |
| 835 | |
| 836 | bool ImGui::CollapseButton(ImGuiID id, const ImVec2& pos) |
| 837 | { |