116 lines
3.1 KiB
C++
116 lines
3.1 KiB
C++
#include "WindowMessageDispatcher.h"
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#include "../Application.h"
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namespace XCEngine::UI::Editor::Host {
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namespace {
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constexpr UINT kDeferredRenderMessage = WM_APP + 1u;
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void TryEnableNonClientDpiScaling(HWND hwnd) {
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if (hwnd == nullptr) {
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return;
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}
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const HMODULE user32 = GetModuleHandleW(L"user32.dll");
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if (user32 == nullptr) {
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return;
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}
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using EnableNonClientDpiScalingFn = BOOL(WINAPI*)(HWND);
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const auto enableNonClientDpiScaling =
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reinterpret_cast<EnableNonClientDpiScalingFn>(
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GetProcAddress(user32, "EnableNonClientDpiScaling"));
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if (enableNonClientDpiScaling != nullptr) {
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enableNonClientDpiScaling(hwnd);
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}
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}
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} // namespace
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Application* WindowMessageDispatcher::GetApplicationFromWindow(HWND hwnd) {
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return reinterpret_cast<Application*>(GetWindowLongPtrW(hwnd, GWLP_USERDATA));
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}
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bool WindowMessageDispatcher::TryHandleNonClientCreate(
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HWND hwnd,
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UINT message,
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LPARAM lParam,
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LRESULT& outResult) {
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if (message != WM_NCCREATE) {
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return false;
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}
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TryEnableNonClientDpiScaling(hwnd);
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const auto* createStruct = reinterpret_cast<CREATESTRUCTW*>(lParam);
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auto* application = reinterpret_cast<Application*>(createStruct->lpCreateParams);
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SetWindowLongPtrW(hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(application));
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outResult = TRUE;
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return true;
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}
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bool WindowMessageDispatcher::TryDispatch(
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Application& application,
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UINT message,
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WPARAM wParam,
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LPARAM lParam,
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LRESULT& outResult) {
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switch (message) {
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case WM_SETCURSOR:
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if (LOWORD(lParam) == HTCLIENT && application.ApplyCurrentCursor()) {
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outResult = TRUE;
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return true;
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}
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return false;
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case WM_DPICHANGED:
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if (lParam == 0) {
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return false;
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}
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application.OnDpiChanged(
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static_cast<UINT>(LOWORD(wParam)),
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*reinterpret_cast<const RECT*>(lParam));
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RequestDeferredRenderFrame(application);
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outResult = 0;
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return true;
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case WM_ENTERSIZEMOVE:
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application.OnEnterSizeMove();
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outResult = 0;
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return true;
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case WM_EXITSIZEMOVE:
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application.OnExitSizeMove();
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RequestDeferredRenderFrame(application);
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outResult = 0;
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return true;
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case WM_SIZE:
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if (wParam != SIZE_MINIMIZED) {
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application.OnResize();
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RequestDeferredRenderFrame(application);
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}
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outResult = 0;
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return true;
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case kDeferredRenderMessage:
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application.OnDeferredRenderMessage();
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outResult = 0;
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return true;
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case WM_PAINT:
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application.OnPaintMessage();
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outResult = 0;
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return true;
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default:
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return false;
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}
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}
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void WindowMessageDispatcher::RequestDeferredRenderFrame(Application& application) {
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if (application.m_hwnd == nullptr ||
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!IsWindow(application.m_hwnd) ||
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!application.m_hostRuntime.TryQueueDeferredRender()) {
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return;
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}
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PostMessageW(application.m_hwnd, kDeferredRenderMessage, 0, 0);
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}
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} // namespace XCEngine::UI::Editor::Host
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