fix: use timer to avoid window hide caused by switching mode

复用了现有的 timer 来避免在无混成时切换 launchpad 模式时失去焦点
导致的窗口隐藏。

Issue: linuxdeepin/developer-center#6818
Log:

launchercontroller.cpp

@@ -127,6 +127,7 @@ void LauncherController::setCurrentFrame(const QString &frame)
     settings.setValue("current_frame", frame);
 
     m_currentFrame = frame;
+    m_timer->start();
     emit currentFrameChanged();
 }
 
@@ -141,3 +142,8 @@ void LauncherController::hideWithTimer()
         setVisible(false);
     }
 }
+
+bool LauncherController::shouldAvoidHideOrActive()
+{
+    return m_timer->isActive();
+}

launchercontroller.h

@@ -35,6 +35,7 @@ class LauncherController : public QObject
     void setCurrentFrame(const QString & frame);
 
     Q_INVOKABLE void hideWithTimer();
+    Q_INVOKABLE bool shouldAvoidHideOrActive();
 
 signals:
     void currentFrameChanged();

qml/Main.qml

@@ -137,7 +137,13 @@ QtObject {
 
         onActiveChanged: {
             if (!active && !DebugHelper.avoidHideWindow && (LauncherController.currentFrame === "WindowedFrame")) {
-                LauncherController.hideWithTimer()
+                // When composting is disabled, switching mode from fullscreen to windowed mode will cause window
+                // activeChanged signal get emitted. We reused the delay timer here to avoid the window get hide
+                // caused by that.
+                // Issue: https://github.com/linuxdeepin/developer-center/issues/6818
+                if (!LauncherController.shouldAvoidHideOrActive()) {
+                    LauncherController.hideWithTimer()
+                }
             }
         }