feat: add preview follows the system opacity.

as title.

PMS-BUG-314371

Author: wjyrich

panels/dock/taskmanager/x11preview.cpp

@@ -28,9 +28,11 @@
 #include <QTimer>
 #include <QWindow>
 #include <QtConcurrent>
+#include <QtGlobal>
 
 #include <DStyle>
 #include <DPlatformHandle>
+#include <QDBusReply>
 
 #include <DWindowManagerHelper>
 #include <DGuiApplicationHelper>
@@ -401,6 +403,7 @@ X11WindowPreviewContainer::X11WindowPreviewContainer(X11WindowMonitor* monitor,
     , m_isDockPreviewCount(0)
     , m_model(new AppItemWindowModel(this))
     , m_titleWidget(new QWidget())
+    , m_systemOpacity(0.2)
 {
     m_hideTimer = new QTimer(this);
     m_hideTimer->setSingleShot(true);
@@ -410,6 +413,12 @@ X11WindowPreviewContainer::X11WindowPreviewContainer(X11WindowMonitor* monitor,
     setMouseTracking(true);
     initUI();
 
+    m_appearanceInterface = new QDBusInterface("org.deepin.dde.Appearance1", 
+                                               "/org/deepin/dde/Appearance1", 
+                                               "org.deepin.dde.Appearance1", 
+                                               QDBusConnection::sessionBus(), this);
+    connect(m_appearanceInterface, SIGNAL(Changed(QString,QString)), this, SLOT(onSystemOpacityChanged(QString,QString)));
+    m_systemOpacity = getSystemOpacity();
     connect(m_hideTimer, &QTimer::timeout, this, &X11WindowPreviewContainer::callHide);
 
     connect(m_closeAllButton, &DIconButton::clicked, this, [this](){
@@ -518,6 +527,33 @@ void X11WindowPreviewContainer::resizeEvent(QResizeEvent *event)
     updatePosition();
 }
 
+void X11WindowPreviewContainer::paintEvent(QPaintEvent *event)
+{
+    Q_UNUSED(event)
+    
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing);
+
+    QColor backgroundColor;
+
+    auto themeType = DGuiApplicationHelper::instance()->themeType();
+    if (themeType == DGuiApplicationHelper::DarkType) {
+        backgroundColor = QColor(0, 0, 0, static_cast<int>(255 * m_systemOpacity));
+    } else {
+        backgroundColor = QColor(255, 255, 255, static_cast<int>(255 * m_systemOpacity));
+    }
+    
+    painter.setBrush(backgroundColor);
+    painter.setPen(Qt::NoPen);
+    
+    // 获取圆角半径
+    DStyleHelper dstyle(style());
+    const int radius = dstyle.pixelMetric(DStyle::PM_FrameRadius);
+    
+    // 绘制带圆角的背景
+    painter.drawRoundedRect(rect(), radius, radius);
+}
+
 void X11WindowPreviewContainer::updatePosition()
 {
     auto screenRect = m_baseWindow->screen()->geometry();
@@ -754,4 +790,31 @@ void X11WindowPreviewContainer::updatePreviewIconFromBase64(const QString &base6
         m_previewIcon->setPixmap(QIcon::fromTheme(m_previewItem->icon()).pixmap(PREVIEW_TITLE_HEIGHT, PREVIEW_TITLE_HEIGHT));
     }
 }
+
+
+double X11WindowPreviewContainer::getSystemOpacity()
+{
+    if (m_appearanceInterface && m_appearanceInterface->isValid()) {
+        QVariant opacityVariant = m_appearanceInterface->property("Opacity");
+        if (opacityVariant.isValid()) {
+            double opacity = opacityVariant.toReal();
+            opacity = qBound(0.0, opacity, 1.0);
+            return opacity;
+        }
+    }
+    return 0.2;
+}
+
+void X11WindowPreviewContainer::onSystemOpacityChanged(const QString &propertyName, const QString &value)
+{
+    //value传过来没有值
+    Q_UNUSED(value);
+
+    // 只处理窗口透明度属性
+    if (propertyName == "windowopacity") {
+        m_systemOpacity = getSystemOpacity();
+        update();
+    }
+}
+
 }

panels/dock/taskmanager/x11preview.h

@@ -17,6 +17,7 @@
 #include <DBlurEffectWidget>
 #include <DGuiApplicationHelper>
 #include <DIconButton>
+#include <QDBusInterface>
 
 DWIDGET_USE_NAMESPACE
 
@@ -76,19 +77,22 @@ class X11WindowPreviewContainer: public DBlurEffectWidget
     void showEvent(QShowEvent *event) override;
     void hideEvent(QHideEvent *event) override;
     void resizeEvent(QResizeEvent *event) override;
+    void paintEvent(QPaintEvent *event) override;
 
 private:
     inline void updatePreviewTitle(const QString& title);
     inline void initUI();
     inline void updateSize();
     void updatePreviewIconFromBase64(const QString &base64Data);
+    double getSystemOpacity();
 
 public Q_SLOTS:
     void updatePosition();
 
 private Q_SLOTS:
     void updateOrientation();
     void callHide();
+    void onSystemOpacityChanged(const QString &propertyName, const QString &value);
 
 private:
     bool m_isPreviewEntered;
@@ -114,6 +118,10 @@ private Q_SLOTS:
     QPointer<AppItem> m_previewItem;
 
     QString m_previewTitleStr;
+    
+    // 透明度相关
+    QDBusInterface* m_appearanceInterface;
+    double m_systemOpacity;
 };
 
 }