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framelesshelper
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Fix the acrylic effect. 

Signed-off-by: Yuhang Zhao <2546789017@qq.com>
This commit is contained in:
Yuhang Zhao 2020-10-17 17:29:58 +08:00
parent ff4556438b
commit 226bc52ece
3 changed files with 20 additions and 8 deletions
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7
examples/Win32Demo/widget.cpp
View File

@ -96,12 +96,7 @@ Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget)
updateWindow(this);
});
connect(ui->blurEffectCB, &QCheckBox::stateChanged, this, [this](int state) {
const bool enable = state == Qt::Checked;
QPalette palette = {};
// Choose the gradient color you like.
palette.setColor(QPalette::Window, QColor(255, 255, 255, 220));
setPalette(enable ? palette : QPalette());
WinNativeEventFilter::setBlurEffectEnabled(getRawHandle(this), enable);
WinNativeEventFilter::setBlurEffectEnabled(getRawHandle(this), state == Qt::Checked);
updateWindow(this);
});
connect(ui->resizableCB, &QCheckBox::stateChanged, this, [this](int state) {

16
winnativeeventfilter.cpp
View File

@ -2357,14 +2357,28 @@ bool WinNativeEventFilter::displaySystemMenu(void *handle,
return false;
}
bool WinNativeEventFilter::setBlurEffectEnabled(void *handle, const bool enabled)
bool WinNativeEventFilter::setBlurEffectEnabled(void *handle,
const bool enabled,
const QColor &gradientColor)
{
Q_ASSERT(handle);
const auto hwnd = reinterpret_cast<HWND>(handle);
if (WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, hwnd)) {
#ifdef QT_WIDGETS_LIB
// Is it possible to set a palette to a QWindow?
QWidget *widget = QWidget::find(reinterpret_cast<WId>(hwnd));
if (widget && widget->isTopLevel()) {
// Qt will paint a solid white background to the window,
// it will cover the blurred effect, so we need to
// make the background become totally transparent. Achieve
// this by setting a palette to the window.
widget->setPalette(enabled ? QPalette(QColor(0, 0, 0, 0)) : QPalette());
}
#endif
if (isWin8OrGreater() && coreData()->m_lpSetWindowCompositionAttribute) {
ACCENT_POLICY accentPolicy;
SecureZeroMemory(&accentPolicy, sizeof(accentPolicy));
accentPolicy.GradientColor = gradientColor.rgba();
WINDOWCOMPOSITIONATTRIBDATA wcaData;
SecureZeroMemory(&wcaData, sizeof(wcaData));
wcaData.Attrib = WCA_ACCENT_POLICY;

5
winnativeeventfilter.h
View File

@ -26,6 +26,7 @@
#include "framelesshelper_global.h"
#include <QAbstractNativeEventFilter>
#include <QColor>
#include <QList>
#include <QRect>
@ -141,7 +142,9 @@ public:
// Enable or disable the blur effect for a specific window.
// On Win10 it's the Acrylic effect.
static bool setBlurEffectEnabled(void *handle /* HWND */, const bool enabled = true);
static bool setBlurEffectEnabled(void *handle /* HWND */,
const bool enabled = true,
const QColor &gradientColor = QColor(255, 255, 255, 0));
// Thin wrapper of DwmExtendFrameIntoClientArea().
static void updateFrameMargins(void *handle /* HWND */);