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Viewport, GLFW: Fix for #2756 under Windows.

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This commit is contained in:
omar 2019-08-29 15:53:33 +02:00
parent a89a3cd2f1
commit a4af3cc814
1 changed files with 13 additions and 13 deletions
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26
examples/imgui_impl_glfw.cpp
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@ -1,7 +1,7 @@
// dear imgui: Platform Binding for GLFW
// This needs to be used along with a Renderer (e.g. OpenGL3, Vulkan..)
// (Info: GLFW is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan graphics context creation, etc.)
// (Requires: GLFW 3.1+)
// (Requires: GLFW 3.1+. Prefer GLFW 3.3+ for full feature support.)
// Implemented features:
// [X] Platform: Clipboard support.
@ -406,9 +406,9 @@ struct ImGuiViewportDataGlfw
{
GLFWwindow* Window;
bool WindowOwned;
bool IgnoreSetWindowSizeEvent;
int IgnoreWindowSizeEventFrame;
ImGuiViewportDataGlfw() { Window = NULL; WindowOwned = false; IgnoreSetWindowSizeEvent = false; }
ImGuiViewportDataGlfw() { Window = NULL; WindowOwned = false; IgnoreWindowSizeEventFrame = -1; }
~ImGuiViewportDataGlfw() { IM_ASSERT(Window == NULL); }
};
@ -430,15 +430,16 @@ static void ImGui_ImplGlfw_WindowSizeCallback(GLFWwindow* window, int, int)
{
if (ImGuiViewportDataGlfw* data = (ImGuiViewportDataGlfw*)viewport->PlatformUserData)
{
if (data->IgnoreSetWindowSizeEvent)
{
// GLFW will dispatch window size event. ImGui expects no such event sent when library explicitly requests setting
// window size. Depending on the platform this callback may be invoked during glfwSetWindowSize() call or queued
// for the next frame and invoked during glfwPollEvents() call. When latter happens - restoring collapsed window
// would have incorrect size.
data->IgnoreSetWindowSizeEvent = false;
// GLFW may dispatch window size event after calling glfwSetWindowSize().
// However depending on the platform the callback may be invoked at different time: on Windows it
// appears to be called within the glfwSetWindowSize() call whereas on Linux it is queued and invoked
// during glfwPollEvents().
// Because the event doesn't always fire on glfwSetWindowSize() we use a frame counter tag to only
// ignore recent glfwSetWindowSize() calls.
bool ignore_event = (ImGui::GetFrameCount() <= data->IgnoreWindowSizeEventFrame + 1);
data->IgnoreWindowSizeEventFrame = -1;
if (ignore_event)
return;
}
}
viewport->PlatformRequestResize = true;
}
@ -584,8 +585,6 @@ static ImVec2 ImGui_ImplGlfw_GetWindowSize(ImGuiViewport* viewport)
static void ImGui_ImplGlfw_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
{
if (ImGuiViewportDataGlfw* data = (ImGuiViewportDataGlfw*)viewport->PlatformUserData)
data->IgnoreSetWindowSizeEvent = true;
ImGuiViewportDataGlfw* data = (ImGuiViewportDataGlfw*)viewport->PlatformUserData;
#if __APPLE__
// Native OS windows are positioned from the bottom-left corner on macOS, whereas on other platforms they are
@ -597,6 +596,7 @@ static void ImGui_ImplGlfw_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
glfwGetWindowSize(data->Window, &width, &height);
glfwSetWindowPos(data->Window, x, y - height + size.y);
#endif
data->IgnoreWindowSizeEventFrame = ImGui::GetFrameCount();
glfwSetWindowSize(data->Window, (int)size.x, (int)size.y);
}