feat: add preview follows the system opacity.

as title.

PMS-BUG-314371

Author: wjyrich

panels/dock/taskmanager/taskmanager.cpp

@@ -152,6 +152,14 @@ 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();
+    if (!appearanceApplet.isNull()) {
+        modifyOpacityChanged();
+        connect(appearanceApplet, SIGNAL(opacityChanged()), this, SLOT(modifyOpacityChanged()));
+    }
     return true;
 }
 
@@ -418,6 +426,19 @@ void TaskManager::activateWindow(uint32_t windowID)
 #endif
 }
 
+void TaskManager::modifyOpacityChanged()
+{
+    DS_NAMESPACE::DAppletBridge appearanceBridge("org.deepin.ds.dde-appearance");
+    auto appearanceApplet = appearanceBridge.applet();
+    if (!appearanceApplet.isNull()) {
+        double opacity = appearanceApplet->property("opacity").toReal();
+        auto x11Monitor = qobject_cast<X11WindowMonitor*>(m_windowMonitor.data());
+        x11Monitor->setPreviewOpacity(opacity);
+    }else{
+        qWarning() << "modifyOpacityChanged: appearanceApplet is null";
+    }
+}
+
 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 modifyOpacityChanged();
 
 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);
@@ -754,4 +755,16 @@ void X11WindowPreviewContainer::updatePreviewIconFromBase64(const QString &base6
         m_previewIcon->setPixmap(QIcon::fromTheme(m_previewItem->icon()).pixmap(PREVIEW_TITLE_HEIGHT, PREVIEW_TITLE_HEIGHT));
     }
 }
+
+double X11WindowPreviewContainer::Opacity() 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 Opacity() const;
+    void setOpacity(double opacity);
 
 protected:
     bool eventFilter(QObject *watched, QEvent *event) override;
@@ -114,6 +116,7 @@ private Q_SLOTS:
     QPointer<AppItem> m_previewItem;
 
     QString m_previewTitleStr;
+    
 };
 
 }

panels/dock/taskmanager/x11windowmonitor.cpp

@@ -109,6 +109,7 @@ void X11WindowMonitor::showItemPreview(const QPointer<AppItem> &item, QObject* r
 
     if (m_windowPreview.isNull()) {
         m_windowPreview.reset(new X11WindowPreviewContainer(this));
+        m_windowPreview->setMaskAlpha(static_cast<int>(m_opacity * 255));
         m_windowPreview->windowHandle()->setTransientParent(qobject_cast<QWindow *>(relativePositionItem));
     }
 
@@ -141,6 +142,14 @@ void X11WindowMonitor::cancelPreviewWindow()
             .call().waitForFinished();
 }
 
+void X11WindowMonitor::setPreviewOpacity(double opacity)
+{
+    m_opacity = opacity;
+    if (!m_windowPreview.isNull()) {
+        m_windowPreview->setMaskAlpha(static_cast<int>(m_opacity * 255));
+    }
+}
+
 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);
@@ -62,5 +63,7 @@ private Q_SLOTS:
     QScopedPointer<XcbEventFilter> m_xcbEventFilter;
     QScopedPointer<X11WindowPreviewContainer> m_windowPreview;
     QHash<xcb_window_t, QSharedPointer<X11Window>> m_windows;
+    double m_opacity;
+
 };
 }