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framelesshelper
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Update. 

Signed-off-by: Yuhang Zhao <2546789017@qq.com>
This commit is contained in:
Yuhang Zhao 2020-04-10 16:09:35 +08:00
parent febedce103
commit 9e2e0bffed
2 changed files with 37 additions and 36 deletions
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69
winnativeeventfilter.cpp
View File

@ -200,6 +200,11 @@ WNEF_GENERATE_WINAPI(UpdateWindow, BOOL, HWND)
WNEF_GENERATE_WINAPI(InvalidateRect, BOOL, HWND, CONST LPRECT, BOOL)
WNEF_GENERATE_WINAPI(SetWindowRgn, int, HWND, HRGN, BOOL)
BOOL isCompositionEnabled() {
BOOL enabled = FALSE;
return SUCCEEDED(m_lpDwmIsCompositionEnabled(&enabled)) && enabled;
}
const UINT m_defaultDotsPerInch = USER_DEFAULT_SCREEN_DPI;
const qreal m_defaultDevicePixelRatio = 1.0;
@ -370,7 +375,7 @@ bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType,
// disabled, it's designed to be, don't force the window to draw a frame
// shadow in that case. According to MSDN, DWM composition is always
// enabled and can't be disabled since Win8.
handleDwmCompositionChanged(data);
updateGlass(msg->hwnd);
// For debug purposes.
qDebug().noquote() << "Window handle:" << msg->hwnd;
qDebug().noquote() << "Window DPI:"
@ -395,6 +400,11 @@ bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType,
// window. On exit, the structure should contain the screen coordinates
// of the corresponding window client area.
const auto mode = static_cast<BOOL>(msg->wParam);
// If the window bounds change, we're going to relayout and repaint
// anyway. Returning WVR_REDRAW avoids an extra paint before that of the
// old client pixels in the (now wrong) location, and thus makes actions
// like resizing a window from the left edge look slightly less broken.
*result = mode ? WVR_REDRAW : 0;
if (IsMaximized(msg->hwnd)) {
const HMONITOR windowMonitor =
m_lpMonitorFromWindow(msg->hwnd, MONITOR_DEFAULTTONEAREST);
@ -448,13 +458,7 @@ bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType,
// mispositioned by the width/height of the upper-left nonclient
// area.
*result = 0;
return true;
}
// If the window bounds change, we're going to relayout and repaint
// anyway. Returning WVR_REDRAW avoids an extra paint before that of the
// old client pixels in the (now wrong) location, and thus makes actions
// like resizing a window from the left edge look slightly less broken.
*result = mode ? WVR_REDRAW : 0;
return true;
}
case WM_NCUAHDRAWCAPTION:
@ -466,7 +470,7 @@ bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType,
return true;
}
case WM_NCPAINT: {
if (data->dwmCompositionEnabled) {
if (isCompositionEnabled()) {
break;
} else {
// Only block WM_NCPAINT when composition is disabled. If it's
@ -545,7 +549,7 @@ bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType,
const bool isRight = mouse.x > (ww - (bw * factor));
const bool fixedSize = _data->windowData.fixedSize;
const auto getBorderValue = [fixedSize](int value) -> int {
// HTBORDER: un-resizeable window border.
// HTBORDER: non-resizeable window border.
return fixedSize ? HTBORDER : value;
};
if (isTop) {
@ -632,28 +636,28 @@ bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType,
case WM_SETICON:
case WM_SETTEXT: {
// Disable painting while these messages are handled to prevent them
// from drawing a window caption over the client area, but only when
// composition is disabled. These messages don't paint
// when composition is enabled and blocking WM_NCUAHDRAWCAPTION should
// be enough to prevent painting when theming is enabled.
if (!data->dwmCompositionEnabled) {
const LONG_PTR oldStyle =
m_lpGetWindowLongPtrW(msg->hwnd, GWL_STYLE);
// Prevent Windows from drawing the default title bar by temporarily
// toggling the WS_VISIBLE style.
m_lpSetWindowLongPtrW(msg->hwnd, GWL_STYLE, oldStyle & ~WS_VISIBLE);
const LRESULT ret = m_lpDefWindowProcW(msg->hwnd, msg->message,
msg->wParam, msg->lParam);
m_lpSetWindowLongPtrW(msg->hwnd, GWL_STYLE, oldStyle);
*result = ret;
return true;
}
break;
// from drawing a window caption over the client area.
const LONG_PTR oldStyle =
m_lpGetWindowLongPtrW(msg->hwnd, GWL_STYLE);
// Prevent Windows from drawing the default title bar by temporarily
// toggling the WS_VISIBLE style.
m_lpSetWindowLongPtrW(msg->hwnd, GWL_STYLE, oldStyle & ~WS_VISIBLE);
const LRESULT ret = m_lpDefWindowProcW(msg->hwnd, msg->message,
msg->wParam, msg->lParam);
m_lpSetWindowLongPtrW(msg->hwnd, GWL_STYLE, oldStyle);
*result = ret;
return true;
}
case WM_DWMCOMPOSITIONCHANGED: {
handleDwmCompositionChanged(data);
updateGlass(msg->hwnd);
break;
}
case WM_ERASEBKGND: {
// Prevent the system from erasing the background of our window
// to avoid weired flashing problems.
*result = 1; // Any non-zero content is OK.
return true;
}
default: {
break;
}
@ -661,16 +665,13 @@ bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType,
return false;
}
void WinNativeEventFilter::handleDwmCompositionChanged(WINDOW *data) {
BOOL enabled = FALSE;
m_lpDwmIsCompositionEnabled(&enabled);
data->dwmCompositionEnabled = enabled;
void WinNativeEventFilter::updateGlass(HWND handle) {
MARGINS margins = {0, 0, 0, 0};
if (enabled) {
if (isCompositionEnabled()) {
// The frame shadow is drawn on the non-client area and thus we have
// to make sure the non-client area rendering is enabled first.
const DWMNCRENDERINGPOLICY ncrp = DWMNCRP_ENABLED;
m_lpDwmSetWindowAttribute(data->hWnd, DWMWA_NCRENDERING_POLICY, &ncrp,
m_lpDwmSetWindowAttribute(handle, DWMWA_NCRENDERING_POLICY, &ncrp,
sizeof(ncrp));
// Negative margins have special meaning to
// DwmExtendFrameIntoClientArea. Negative margins create the "sheet of
@ -680,7 +681,7 @@ void WinNativeEventFilter::handleDwmCompositionChanged(WINDOW *data) {
// background will be transparent, we don't want that.
margins = {-1, -1, -1, -1};
}
m_lpDwmExtendFrameIntoClientArea(data->hWnd, &margins);
m_lpDwmExtendFrameIntoClientArea(handle, &margins);
}
UINT WinNativeEventFilter::getDotsPerInchForWindow(HWND handle) {

4
winnativeeventfilter.h
View File

@ -46,7 +46,7 @@ public:
using WINDOW = struct _WINDOW {
HWND hWnd = nullptr;
BOOL dwmCompositionEnabled = FALSE, initialized = FALSE;
BOOL initialized = FALSE;
WINDOWDATA windowData;
};
@ -105,7 +105,7 @@ public:
private:
static void initWin32Api();
static void createUserData(HWND handle, const WINDOWDATA *data = nullptr);
void handleDwmCompositionChanged(WINDOW *data);
void updateGlass(HWND handle);
static qreal getPreferedNumber(qreal num);
static UINT getDotsPerInchForWindow(HWND handle);
static qreal getDevicePixelRatioForWindow(HWND handle);