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Viewport: When resizing/moving a window using the host OS/WM we attempt to merge back into host viewport. (#1542)
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parent
1cafdb5b46
commit
7f960616e0
10
imgui.cpp
10
imgui.cpp
@ -3553,7 +3553,7 @@ static void ImGui::UpdateViewports()
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if (viewport->PlatformRequestResize)
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viewport->Size = g.PlatformIO.Platform_GetWindowSize(viewport);
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// Translate imgui windows when a host viewport has been moved
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// Translate imgui windows when a Host Viewport has been moved
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ImVec2 delta = viewport->Pos - viewport->LastPos;
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if ((viewport->Flags & ImGuiViewportFlags_CanHostOtherWindows) && (delta.x != 0.0f || delta.y != 0.0f))
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for (int window_n = 0; window_n < g.Windows.Size; window_n++)
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@ -6827,13 +6827,19 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
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}
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}
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// Synchronize viewport --> window
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// Synchronize viewport --> window in case the platform window has been moved or resized from the OS/WM
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if (window->ViewportOwned)
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{
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if (window->Viewport->PlatformRequestMove)
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{
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window->Pos = window->Viewport->Pos;
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window->ViewportTryMerge = true;
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}
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if (window->Viewport->PlatformRequestResize)
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{
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window->Size = window->SizeFull = window->Viewport->Size;
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window->ViewportTryMerge = true;
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}
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// We also tell the back-end that clearing the platform window won't be necessary, as our window is filling the viewport and we have disabled BgAlpha
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window->Viewport->Flags |= ImGuiViewportFlags_NoRendererClear;
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4
imgui.h
4
imgui.h
@ -2004,8 +2004,8 @@ struct ImGuiViewport
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void* PlatformUserData; // void* to hold custom data structure for the platform (e.g. windowing info, render context)
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void* PlatformHandle; // void* for FindViewportByPlatformHandle(). (e.g. suggested to use natural platform handle such as HWND, GlfwWindow*, SDL_Window*)
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bool PlatformRequestClose; // Platform window requested closure
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bool PlatformRequestMove; // Platform window requested move (e.g. window was moved using OS windowing facility)
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bool PlatformRequestResize; // Platform window requested resize (e.g. window was resize using OS windowing facility)
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bool PlatformRequestMove; // Platform window requested move (e.g. window was moved by the OS / host window manager)
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bool PlatformRequestResize; // Platform window requested resize (e.g. window was resize by the OS / host window manager)
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void* RendererUserData; // void* to hold custom data structure for the renderer (e.g. swap chain, frame-buffers etc.)
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ImGuiViewport() { ID = 0; Flags = 0; DpiScale = 0.0f; DrawData = NULL; PlatformUserData = PlatformHandle = NULL; PlatformRequestClose = PlatformRequestMove = PlatformRequestResize = false; RendererUserData = NULL; }
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