1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
#include "cru/platform/gui/win/GodWindow.h"
#include "cru/base/log/Logger.h"
#include "cru/platform/gui/win/Exception.h"
#include "cru/platform/gui/win/UiApplication.h"
#include "cru/platform/gui/win/WindowClass.h"
namespace cru::platform::gui::win {
constexpr auto god_window_class_name = L"GodWindowClass";
LRESULT CALLBACK GodWndProc(HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam) {
const auto app = WinUiApplication::GetInstance();
if (app) {
LRESULT result;
auto god_window = app->GetGodWindow();
if (god_window != nullptr) {
const auto handled = god_window->HandleGodWindowMessage(
hWnd, uMsg, wParam, lParam, &result);
if (handled) return result;
}
}
return DefWindowProcW(hWnd, uMsg, wParam, lParam);
}
GodWindow::GodWindow(WinUiApplication* application) {
application_ = application;
const auto h_instance = application->GetInstanceHandle();
god_window_class_ = std::make_unique<WindowClass>(god_window_class_name,
GodWndProc, h_instance);
hwnd_ = CreateWindowEx(0, god_window_class_name, L"", 0, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
HWND_MESSAGE, nullptr, h_instance, nullptr);
if (hwnd_ == nullptr)
throw Win32Error(::GetLastError(), u"Failed to create god window.");
}
GodWindow::~GodWindow() {
if (!::DestroyWindow(hwnd_)) {
// Although this could be "safely" ignore.
CRU_LOG_TAG_WARN("Failed to destroy god window.");
}
}
bool GodWindow::HandleGodWindowMessage(HWND hwnd, UINT msg, WPARAM w_param,
LPARAM l_param, LRESULT* result) {
WindowNativeMessageEventArgs args(
WindowNativeMessage{hwnd, msg, w_param, l_param});
message_event_.Raise(args);
if (args.IsHandled()) {
*result = args.GetResult();
return true;
}
return false;
}
} // namespace cru::platform::gui::win
|
