feat: add preview follows the system opacity.

as title.

PMS-BUG-314371

Author: wjyrich

panels/dock/taskmanager/taskmanager.cpp

@@ -152,6 +152,12 @@ bool TaskManager::init()
         m_windowFullscreen = isFullscreen;
         emit windowFullscreenChanged(isFullscreen);
     });
+
+    // 设置preview opacity
+    DS_NAMESPACE::DAppletBridge appearanceBridge("org.deepin.ds.dde-appearance");
+    auto appearanceApplet = appearanceBridge.applet();
+    connect(appearanceApplet, SIGNAL(opacityChanged()), this, SLOT(onOpacityChanged()));
+
     return true;
 }
 
@@ -418,6 +424,24 @@ void TaskManager::activateWindow(uint32_t windowID)
 #endif
 }
 
+void TaskManager::onOpacityChanged()
+{
+    DS_NAMESPACE::DAppletBridge appearanceBridge("org.deepin.ds.dde-appearance");
+    if (appearanceBridge.isValid()) {
+        auto appearanceApplet = appearanceBridge.applet();
+        QVariant opacityVariant = appearanceApplet->property("opacity");
+        if (opacityVariant.isValid()) {
+            double opacity = opacityVariant.toReal();
+            if (m_windowMonitor) {
+                auto x11Monitor = qobject_cast<X11WindowMonitor*>(m_windowMonitor.data());
+                if (x11Monitor) {
+                    x11Monitor->setPreviewOpacity(opacity);
+                }
+            }
+        }
+    }
+}
+
 D_APPLET_CLASS(TaskManager)
 }
 

panels/dock/taskmanager/taskmanager.h

@@ -101,6 +101,7 @@ class TaskManager : public DS_NAMESPACE::DContainment, public AbstractTaskManage
     Q_INVOKABLE void setAppItemWindowIconGeometry(const QString& appid, QObject* relativePositionItem, const int& x1, const int& y1, const int& x2, const int& y2);
     Q_INVOKABLE void activateWindow(uint32_t windowID);
 
+
 Q_SIGNALS:
     void dataModelChanged();
     void windowSplitChanged();
@@ -109,6 +110,7 @@ class TaskManager : public DS_NAMESPACE::DContainment, public AbstractTaskManage
 
 private Q_SLOTS:
     void handleWindowAdded(QPointer<AbstractWindow> window);
+    void onOpacityChanged();
 
 private:
     void loadDockedAppItems();

panels/dock/taskmanager/x11preview.cpp

@@ -401,6 +401,7 @@ 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);
@@ -518,6 +519,33 @@ 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 +782,16 @@ void X11WindowPreviewContainer::updatePreviewIconFromBase64(const QString &base6
         m_previewIcon->setPixmap(QIcon::fromTheme(m_previewItem->icon()).pixmap(PREVIEW_TITLE_HEIGHT, PREVIEW_TITLE_HEIGHT));
     }
 }
+
+double X11WindowPreviewContainer::getOpacity() const
+{
+    return m_systemOpacity;
+}
+
+void X11WindowPreviewContainer::setOpacity(double opacity)
+{
+    m_systemOpacity = opacity;
+    update();
+}
+
 }

panels/dock/taskmanager/x11preview.h

@@ -68,6 +68,8 @@ class X11WindowPreviewContainer: public DBlurEffectWidget
     explicit X11WindowPreviewContainer(X11WindowMonitor* monitor, QWidget *parent = nullptr);
     void showPreview(const QPointer<AppItem> &item, const QPointer<QWindow> &window, int32_t previewXoffset, int32_t previewYoffset, uint32_t direction);
     void hidePreView();
+    double getOpacity() const;
+    void setOpacity(double opacity);
 
 protected:
     bool eventFilter(QObject *watched, QEvent *event) override;
@@ -76,6 +78,7 @@ 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);
@@ -114,6 +117,8 @@ private Q_SLOTS:
     QPointer<AppItem> m_previewItem;
 
     QString m_previewTitleStr;
+    
+    double m_systemOpacity;
 };
 
 }

panels/dock/taskmanager/x11windowmonitor.cpp

@@ -141,6 +141,13 @@ void X11WindowMonitor::cancelPreviewWindow()
             .call().waitForFinished();
 }
 
+void X11WindowMonitor::setPreviewOpacity(double opacity)
+{
+    if (!m_windowPreview.isNull()) {
+        m_windowPreview->setOpacity(opacity);
+    }
+}
+
 void X11WindowMonitor::onWindowMapped(xcb_window_t xcb_window)
 {
     auto window = m_windows.value(xcb_window, nullptr);

panels/dock/taskmanager/x11windowmonitor.h

@@ -41,6 +41,7 @@ class X11WindowMonitor : public AbstractWindowMonitor
     virtual void hideItemPreview() override;
     void previewWindow(uint32_t winId);
     void cancelPreviewWindow();
+    void setPreviewOpacity(double opacity);
 
 Q_SIGNALS:
     void windowMapped(xcb_window_t window);