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Viewport: Avoid modifying MousePos in UpdateWindowViewport just for the sake of docking test, sheering MousePos during the frame is problematic + minor renaming. (#1542)

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omar 2018-03-21 22:47:34 +01:00
parent e5ba982be0
commit 4f112f898e
1 changed files with 6 additions and 12 deletions
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18
imgui.cpp
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@ -738,14 +738,14 @@ static void UpdateMovingWindowDropViewport(ImGuiWindow* window);
static void UpdateManualResize(ImGuiWindow* window, const ImVec2& size_auto_fit, int* border_held, int resize_grip_count, ImU32 resize_grip_col[4]);
static void FocusFrontMostActiveWindow(ImGuiWindow* ignore_window);
// Viewport
// Viewports
const ImGuiID IMGUI_VIEWPORT_DEFAULT_ID = 0x11111111; // Using a constant instead of e.g. ImHash("ViewportDefault", 0); so it's easier to spot in the debugger. The exact value doesn't matter.
static inline ImRect GetViewportRect(ImGuiWindow* window) { return window->Viewport->GetRect(); }
static inline ImVec2 ConvertViewportPosToPlatformPos(const ImVec2& imgui_pos, ImGuiViewport* viewport) { return imgui_pos - viewport->Pos + viewport->PlatformPos; }
static inline ImVec2 ConvertPlatformPosToViewportPos(const ImVec2& platform_pos, ImGuiViewport* viewport) { return platform_pos - viewport->PlatformPos + viewport->Pos; }
static ImGuiViewportP* Viewport(ImGuiWindow* window, ImGuiID id, ImGuiViewportFlags flags, const ImVec2& platform_pos, const ImVec2& size);
static void UpdateViewports();
static void UpdateWindowViewport(ImGuiWindow* window, bool window_pos_set_by_api);
static void UpdateSelectWindowViewport(ImGuiWindow* window);
static void SetCurrentViewport(ImGuiViewportP* viewport);
static void SetWindowViewportTranslateToPreservePlatformPos(ImGuiWindow* window, ImGuiViewportP* old_viewport, ImGuiViewportP* new_viewport);
static void ResizeViewportTranslateWindows(int viewport_idx_min, int viewport_idx_max, float pos_x_delta, int idx_delta, ImGuiViewport* viewport_to_erase);
@ -5989,11 +5989,10 @@ static void ImGui::SetWindowViewportTranslateToPreservePlatformPos(ImGuiWindow*
}
// FIXME-VIEWPORT: This is all super messy and ought to be clarified or rewritten.
static void ImGui::UpdateWindowViewport(ImGuiWindow* window, bool window_pos_set_by_api)
static void ImGui::UpdateSelectWindowViewport(ImGuiWindow* window)
{
ImGuiContext& g = *GImGui;
ImGuiWindowFlags flags = window->Flags;
(void)window_pos_set_by_api;
// Restore main viewport if multi-viewport is not supported by the back-end
ImGuiViewportP* main_viewport = g.Viewports[0];
@ -6013,29 +6012,24 @@ static void ImGui::UpdateWindowViewport(ImGuiWindow* window, bool window_pos_set
{
// Code explicitly request a viewport
window->Viewport = FindViewportByID(g.NextWindowData.ViewportId);
window->ViewportId = g.NextWindowData.ViewportId; // Store ID even if Viewport isn't resolved.
window->ViewportId = g.NextWindowData.ViewportId; // Store ID even if Viewport isn't resolved yet.
}
else if (flags & ImGuiWindowFlags_ChildWindow)
{
IM_ASSERT(window->ParentWindow);
window->Viewport = window->ParentWindow->Viewport;
}
else if (window_follow_mouse_viewport && IsMousePosValid())
{
// Calculate mouse position in OS/platform coordinates
ImGuiViewportP* current_viewport = window->Viewport;
if (!window_is_mouse_tooltip && !current_viewport->GetRect().Contains(window->Rect()))
{
// Create an undecorated, temporary OS/platform window
// Calculate mouse position in OS/platform coordinates, create a Viewport at this position.
ImVec2 platform_pos = ConvertViewportPosToPlatformPos(g.IO.MousePos - g.ActiveIdClickOffset, g.MousePosViewport);
ImGuiViewportFlags viewport_flags = ImGuiViewportFlags_NoDecoration | ImGuiViewportFlags_NoFocusOnAppearing | ImGuiViewportFlags_NoInputs;
ImGuiViewportP* viewport = Viewport(window, window->ID, viewport_flags, platform_pos, window->Size);
window->Flags |= ImGuiWindowFlags_FullViewport;
window->Viewport = viewport;
created_viewport = true;
// Preserve relative mouse position so docking title bar test stays valid mid-frame (since it isn't latched)
g.IO.MousePos = g.IO.MousePosPrev = window->Viewport->Pos + g.ActiveIdClickOffset;
}
else
{
@ -6393,7 +6387,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// VIEWPORT
// We need to do this before using any style/font sizes, as viewport with a different DPI will affect those sizes.
UpdateWindowViewport(window, window_pos_set_by_api);
UpdateSelectWindowViewport(window);
SetCurrentViewport(window->Viewport);
window->FontDpiScale = (g.IO.ConfigFlags & ImGuiConfigFlags_EnableDpiScaleFonts) ? window->Viewport->DpiScale : 1.0f;
SetCurrentWindow(window);