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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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This commit is contained in:
omar 2018-05-16 14:34:46 +02:00
parent 1cafdb5b46
commit 7f960616e0
2 changed files with 10 additions and 4 deletions
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10
imgui.cpp
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@ -3553,7 +3553,7 @@ static void ImGui::UpdateViewports()
if (viewport->PlatformRequestResize)
viewport->Size = g.PlatformIO.Platform_GetWindowSize(viewport);
// Translate imgui windows when a host viewport has been moved
// Translate imgui windows when a Host Viewport has been moved
ImVec2 delta = viewport->Pos - viewport->LastPos;
if ((viewport->Flags & ImGuiViewportFlags_CanHostOtherWindows) && (delta.x != 0.0f || delta.y != 0.0f))
for (int window_n = 0; window_n < g.Windows.Size; window_n++)
@ -6827,13 +6827,19 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
}
}
// Synchronize viewport --> window
// Synchronize viewport --> window in case the platform window has been moved or resized from the OS/WM
if (window->ViewportOwned)
{
if (window->Viewport->PlatformRequestMove)
{
window->Pos = window->Viewport->Pos;
window->ViewportTryMerge = true;
}
if (window->Viewport->PlatformRequestResize)
{
window->Size = window->SizeFull = window->Viewport->Size;
window->ViewportTryMerge = true;
}
// 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
window->Viewport->Flags |= ImGuiViewportFlags_NoRendererClear;

4
imgui.h
View File

@ -2004,8 +2004,8 @@ struct ImGuiViewport
void* PlatformUserData; // void* to hold custom data structure for the platform (e.g. windowing info, render context)
void* PlatformHandle; // void* for FindViewportByPlatformHandle(). (e.g. suggested to use natural platform handle such as HWND, GlfwWindow*, SDL_Window*)
bool PlatformRequestClose; // Platform window requested closure
bool PlatformRequestMove; // Platform window requested move (e.g. window was moved using OS windowing facility)
bool PlatformRequestResize; // Platform window requested resize (e.g. window was resize using OS windowing facility)
bool PlatformRequestMove; // Platform window requested move (e.g. window was moved by the OS / host window manager)
bool PlatformRequestResize; // Platform window requested resize (e.g. window was resize by the OS / host window manager)
void* RendererUserData; // void* to hold custom data structure for the renderer (e.g. swap chain, frame-buffers etc.)
ImGuiViewport() { ID = 0; Flags = 0; DpiScale = 0.0f; DrawData = NULL; PlatformUserData = PlatformHandle = NULL; PlatformRequestClose = PlatformRequestMove = PlatformRequestResize = false; RendererUserData = NULL; }