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Viewport: Reapply/recover ownership of viewport which is convenient for docking but also can recover from faulty .ini files. (#1542)

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This commit is contained in:
omar 2018-06-26 20:51:44 +02:00
parent 574185426c
commit 7abf72ec78
1 changed files with 20 additions and 9 deletions
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29
imgui.cpp
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@ -908,7 +908,7 @@ static ImGuiViewportP* AddUpdateViewport(ImGuiWindow* window, ImGuiID id, const
static void UpdateViewports();
static void UpdateSelectWindowViewport(ImGuiWindow* window);
static void UpdateTryMergeWindowIntoHostViewport(ImGuiWindow* window, ImGuiViewportP* host_viewport);
static void SetCurrentViewport(ImGuiViewportP* viewport);
static void SetCurrentViewport(ImGuiWindow* window, ImGuiViewportP* viewport);
static int FindPlatformMonitorForPos(const ImVec2& pos);
static int FindPlatformMonitorForRect(const ImRect& r);
@ -4924,7 +4924,7 @@ void ImGui::EndFrame()
g.CurrentWindow->Active = false;
End();
SetCurrentViewport(NULL);
SetCurrentViewport(NULL, NULL);
if (g.ActiveId == 0 && g.HoveredId == 0)
{
@ -5105,16 +5105,26 @@ ImGuiViewport* ImGui::FindViewportByPlatformHandle(void* platform_handle)
return NULL;
}
void ImGui::SetCurrentViewport(ImGuiViewportP* viewport)
void ImGui::SetCurrentViewport(ImGuiWindow* current_window, ImGuiViewportP* viewport)
{
// Notify platform layer of viewport changes
// FIXME-DPI: This is only currently used for experimenting with handling of multiple DPI
ImGuiContext& g = *GImGui;
if (viewport)
{
// First window submitted gets viewport ownership
if (viewport->LastFrameActive < g.FrameCount && viewport->Window != current_window && viewport->Window != NULL && current_window != NULL)
{
//printf("[%05d] Window '%s' steal Viewport %08X from Window '%s'\n", g.FrameCount, current_window->Name, viewport->ID, viewport->Window->Name);
viewport->Window = current_window;
viewport->ID = current_window->ID;
}
viewport->LastFrameActive = g.FrameCount;
}
if (g.CurrentViewport == viewport)
return;
g.CurrentViewport = viewport;
// Notify platform layer of viewport changes
// FIXME-DPI: This is only currently used for experimenting with handling of multiple DPI
if (g.CurrentViewport && g.PlatformIO.Platform_OnChangedViewport)
g.PlatformIO.Platform_OnChangedViewport(g.CurrentViewport);
}
@ -5150,6 +5160,7 @@ ImGuiViewportP* ImGui::AddUpdateViewport(ImGuiWindow* window, ImGuiID id, const
viewport->Window = window;
viewport->Flags = flags;
viewport->LastFrameActive = g.FrameCount;
IM_ASSERT(window == NULL || viewport->ID == window->ID);
if (window != NULL)
window->ViewportOwned = true;
@ -7142,7 +7153,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// We need to do this before using any style/font sizes, as viewport with a different DPI may affect font sizes.
UpdateSelectWindowViewport(window);
SetCurrentViewport(window->Viewport);
SetCurrentViewport(window, window->Viewport);
window->FontDpiScale = (g.IO.ConfigFlags & ImGuiConfigFlags_DpiEnableScaleFonts) ? window->Viewport->DpiScale : 1.0f;
SetCurrentWindow(window);
flags = window->Flags;
@ -7260,7 +7271,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// FIXME-DPI
//IM_ASSERT(old_viewport->DpiScale == window->Viewport->DpiScale); // FIXME-DPI: Something went wrong
SetCurrentViewport(window->Viewport);
SetCurrentViewport(window, window->Viewport);
window->FontDpiScale = (g.IO.ConfigFlags & ImGuiConfigFlags_DpiEnableScaleFonts) ? window->Viewport->DpiScale : 1.0f;
SetCurrentWindow(window);
}
@ -7632,7 +7643,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
else
{
// Append
SetCurrentViewport(window->Viewport);
SetCurrentViewport(window, window->Viewport);
SetCurrentWindow(window);
}
@ -7707,7 +7718,7 @@ void ImGui::End()
CheckStacksSize(window, false);
SetCurrentWindow(g.CurrentWindowStack.empty() ? NULL : g.CurrentWindowStack.back());
if (g.CurrentWindow)
SetCurrentViewport(g.CurrentWindow->Viewport);
SetCurrentViewport(g.CurrentWindow, g.CurrentWindow->Viewport);
}
// Vertical scrollbar