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Viewport, Platform: Fixed a crash if the back-end set the PlatformRequestMove/PlatformRequestSize flags while viewports were disabled (it happened in the SDL back-end, and generally we want to tolerate it to make back-end implementation simpler). (#1542)

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This commit is contained in:
omar 2018-05-23 18:01:50 +02:00
parent 1176460e44
commit ed84b2aaeb
1 changed files with 17 additions and 14 deletions
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31
imgui.cpp
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@ -3555,22 +3555,25 @@ static void ImGui::UpdateViewports()
continue; continue;
} }
// Apply Position and Size (from Platform Window to ImGui) if requested. if ((g.IO.ConfigFlags & ImGuiConfigFlags_ViewportsEnable))
// We do it early in the frame instead of waiting for UpdatePlatformWindows() to avoid a frame of lag when moving/resizing using OS facilities. {
if (viewport->PlatformRequestMove) // Apply Position and Size (from Platform Window to ImGui) if requested.
viewport->Pos = g.PlatformIO.Platform_GetWindowPos(viewport); // We do it early in the frame instead of waiting for UpdatePlatformWindows() to avoid a frame of lag when moving/resizing using OS facilities.
if (viewport->PlatformRequestResize) if (viewport->PlatformRequestMove)
viewport->Size = g.PlatformIO.Platform_GetWindowSize(viewport); viewport->Pos = g.PlatformIO.Platform_GetWindowPos(viewport);
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; ImVec2 delta = viewport->Pos - viewport->LastPos;
if ((viewport->Flags & ImGuiViewportFlags_CanHostOtherWindows) && (delta.x != 0.0f || delta.y != 0.0f)) 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++) for (int window_n = 0; window_n < g.Windows.Size; window_n++)
if (g.Windows[window_n]->Viewport == viewport) if (g.Windows[window_n]->Viewport == viewport)
TranslateWindow(g.Windows[window_n], delta); TranslateWindow(g.Windows[window_n], delta);
// Update monitor (we'll use this info to clamp windows and save windows lost in a removed monitor) // Update monitor (we'll use this info to clamp windows and save windows lost in a removed monitor)
viewport->PlatformMonitor = FindPlatformMonitorForRect(viewport->GetRect()); viewport->PlatformMonitor = FindPlatformMonitorForRect(viewport->GetRect());
}
// Update DPI scale // Update DPI scale
float new_dpi_scale; float new_dpi_scale;