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Internals: backport window HitTestHole code from docking branch + RenderRectFilledWithHole() helper. (#1512, #3368)

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This commit is contained in:
omar 2020-07-29 14:44:58 +02:00
parent bbd061538c
commit c7f5876f8a
3 changed files with 40 additions and 0 deletions
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20
imgui.cpp
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@ -4295,6 +4295,16 @@ static void FindHoveredWindow()
if (!bb.Contains(g.IO.MousePos))
continue;
// Support for one rectangular hole in any given window
// FIXME: Consider generalizing hit-testing override (with more generic data, callback, etc.) (#1512)
if (window->HitTestHoleSize.x != 0)
{
ImVec2 hole_pos(window->Pos.x + (float)window->HitTestHoleOffset.x, window->Pos.y + (float)window->HitTestHoleOffset.y);
ImVec2 hole_size((float)window->HitTestHoleSize.x, (float)window->HitTestHoleSize.y);
if (ImRect(hole_pos, hole_pos + hole_size).Contains(g.IO.MousePos))
continue;
}
// Those seemingly unnecessary extra tests are because the code here is a little different in viewport/docking branches.
if (hovered_window == NULL)
hovered_window = window;
@ -5940,6 +5950,9 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
if (!(flags & ImGuiWindowFlags_NoTitleBar))
RenderWindowTitleBarContents(window, title_bar_rect, name, p_open);
// Clear hit test shape every frame
window->HitTestHoleSize.x = window->HitTestHoleSize.y = 0;
// Pressing CTRL+C while holding on a window copy its content to the clipboard
// This works but 1. doesn't handle multiple Begin/End pairs, 2. recursing into another Begin/End pair - so we need to work that out and add better logging scope.
// Maybe we can support CTRL+C on every element?
@ -6429,6 +6442,13 @@ void ImGui::SetWindowCollapsed(ImGuiWindow* window, bool collapsed, ImGuiCond co
window->Collapsed = collapsed;
}
void ImGui::SetWindowHitTestHole(ImGuiWindow* window, const ImVec2& pos, const ImVec2& size)
{
IM_ASSERT(window->HitTestHoleSize.x == 0); // We don't support multiple holes/hit test filters
window->HitTestHoleSize = ImVec2ih(size);
window->HitTestHoleOffset = ImVec2ih(pos - window->Pos);
}
void ImGui::SetWindowCollapsed(bool collapsed, ImGuiCond cond)
{
SetWindowCollapsed(GImGui->CurrentWindow, collapsed, cond);

16
imgui_draw.cpp
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@ -3501,6 +3501,22 @@ void ImGui::RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, Im
draw_list->PathFillConvex(col);
}
void ImGui::RenderRectFilledWithHole(ImDrawList* draw_list, ImRect outer, ImRect inner, ImU32 col, float rounding)
{
const bool fill_L = (inner.Min.x > outer.Min.x);
const bool fill_R = (inner.Max.x < outer.Max.x);
const bool fill_U = (inner.Min.y > outer.Min.y);
const bool fill_D = (inner.Max.y < outer.Max.y);
if (fill_L) draw_list->AddRectFilled(ImVec2(outer.Min.x, inner.Min.y), ImVec2(inner.Min.x, inner.Max.y), col, rounding, (fill_U ? 0 : ImDrawCornerFlags_TopLeft) | (fill_D ? 0 : ImDrawCornerFlags_BotLeft));
if (fill_R) draw_list->AddRectFilled(ImVec2(inner.Max.x, inner.Min.y), ImVec2(outer.Max.x, inner.Max.y), col, rounding, (fill_U ? 0 : ImDrawCornerFlags_TopRight) | (fill_D ? 0 : ImDrawCornerFlags_BotRight));
if (fill_U) draw_list->AddRectFilled(ImVec2(inner.Min.x, outer.Min.y), ImVec2(inner.Max.x, inner.Min.y), col, rounding, (fill_L ? 0 : ImDrawCornerFlags_TopLeft) | (fill_R ? 0 : ImDrawCornerFlags_TopRight));
if (fill_D) draw_list->AddRectFilled(ImVec2(inner.Min.x, inner.Max.y), ImVec2(inner.Max.x, outer.Max.y), col, rounding, (fill_L ? 0 : ImDrawCornerFlags_BotLeft) | (fill_R ? 0 : ImDrawCornerFlags_BotRight));
if (fill_L && fill_U) draw_list->AddRectFilled(ImVec2(outer.Min.x, outer.Min.y), ImVec2(inner.Min.x, inner.Min.y), col, rounding, ImDrawCornerFlags_TopLeft);
if (fill_R && fill_U) draw_list->AddRectFilled(ImVec2(inner.Max.x, outer.Min.y), ImVec2(outer.Max.x, inner.Min.y), col, rounding, ImDrawCornerFlags_TopRight);
if (fill_L && fill_D) draw_list->AddRectFilled(ImVec2(outer.Min.x, inner.Max.y), ImVec2(inner.Min.x, outer.Max.y), col, rounding, ImDrawCornerFlags_BotLeft);
if (fill_R && fill_D) draw_list->AddRectFilled(ImVec2(inner.Max.x, inner.Max.y), ImVec2(outer.Max.x, outer.Max.y), col, rounding, ImDrawCornerFlags_BotRight);
}
// Helper for ColorPicker4()
// NB: This is rather brittle and will show artifact when rounding this enabled if rounded corners overlap multiple cells. Caller currently responsible for avoiding that.
// Spent a non reasonable amount of time trying to getting this right for ColorButton with rounding+anti-aliasing+ImGuiColorEditFlags_HalfAlphaPreview flag + various grid sizes and offsets, and eventually gave up... probably more reasonable to disable rounding altogether.

4
imgui_internal.h
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@ -1615,6 +1615,8 @@ struct IMGUI_API ImGuiWindow
ImRect WorkRect; // Cover the whole scrolling region, shrunk by WindowPadding*1.0f on each side. This is meant to replace ContentRegionRect over time (from 1.71+ onward).
ImRect ClipRect; // Current clipping/scissoring rectangle, evolve as we are using PushClipRect(), etc. == DrawList->clip_rect_stack.back().
ImRect ContentRegionRect; // FIXME: This is currently confusing/misleading. It is essentially WorkRect but not handling of scrolling. We currently rely on it as right/bottom aligned sizing operation need some size to rely on.
ImVec2ih HitTestHoleSize; // Define an optional rectangular hole where mouse will pass-through the window.
ImVec2ih HitTestHoleOffset;
int LastFrameActive; // Last frame number the window was Active.
float LastTimeActive; // Last timestamp the window was Active (using float as we don't need high precision there)
@ -1775,6 +1777,7 @@ namespace ImGui
IMGUI_API void SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond = 0);
IMGUI_API void SetWindowSize(ImGuiWindow* window, const ImVec2& size, ImGuiCond cond = 0);
IMGUI_API void SetWindowCollapsed(ImGuiWindow* window, bool collapsed, ImGuiCond cond = 0);
IMGUI_API void SetWindowHitTestHole(ImGuiWindow* window, const ImVec2& pos, const ImVec2& size);
// Windows: Display Order and Focus Order
IMGUI_API void FocusWindow(ImGuiWindow* window);
@ -1943,6 +1946,7 @@ namespace ImGui
IMGUI_API void RenderMouseCursor(ImDrawList* draw_list, ImVec2 pos, float scale, ImGuiMouseCursor mouse_cursor, ImU32 col_fill, ImU32 col_border, ImU32 col_shadow);
IMGUI_API void RenderArrowPointingAt(ImDrawList* draw_list, ImVec2 pos, ImVec2 half_sz, ImGuiDir direction, ImU32 col);
IMGUI_API void RenderRectFilledRangeH(ImDrawList* draw_list, const ImRect& rect, ImU32 col, float x_start_norm, float x_end_norm, float rounding);
IMGUI_API void RenderRectFilledWithHole(ImDrawList* draw_list, ImRect outer, ImRect inner, ImU32 col, float rounding);
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
// [1.71: 2019/06/07: Updating prototypes of some of the internal functions. Leaving those for reference for a short while]