demo: center window on first show

Looks better than before.

Signed-off-by: Yuhang Zhao <2546789017@qq.com>

examples/mainwindow/mainwindow.cpp

@@ -41,6 +41,16 @@ MainWindow::MainWindow(QWidget *parent, const Qt::WindowFlags flags) : Frameless
 
 MainWindow::~MainWindow() = default;
 
+void MainWindow::showEvent(QShowEvent *event)
+{
+    FramelessMainWindow::showEvent(event);
+    static bool exposed = false;
+    if (!exposed) {
+        exposed = true;
+        FramelessWidgetsHelper::get(this)->moveWindowToDesktopCenter();
+    }
+}
+
 void MainWindow::initialize()
 {
     m_titleBar.reset(new StandardTitleBar(this));

examples/mainwindow/mainwindow.h

@@ -44,6 +44,9 @@ public:
     explicit MainWindow(QWidget *parent = nullptr, const Qt::WindowFlags flags = {});
     ~MainWindow() override;
 
+protected:
+    void showEvent(QShowEvent *event) override;
+
 private:
     void initialize();
 

examples/openglwidget/mainwindow.cpp

@@ -40,6 +40,16 @@ MainWindow::MainWindow(QWidget *parent) : FramelessWidget(parent)
 
 MainWindow::~MainWindow() = default;
 
+void MainWindow::showEvent(QShowEvent *event)
+{
+    FramelessWidget::showEvent(event);
+    static bool exposed = false;
+    if (!exposed) {
+        exposed = true;
+        FramelessWidgetsHelper::get(this)->moveWindowToDesktopCenter();
+    }
+}
+
 void MainWindow::initialize()
 {
     resize(800, 600);

examples/openglwidget/mainwindow.h

@@ -41,6 +41,9 @@ public:
     explicit MainWindow(QWidget *parent = nullptr);
     ~MainWindow() override;
 
+protected:
+    void showEvent(QShowEvent *event) override;
+
 private:
     void initialize();
 

examples/widget/widget.cpp

@@ -48,10 +48,19 @@ Widget::~Widget() = default;
 void Widget::timerEvent(QTimerEvent *event)
 {
     FramelessWidget::timerEvent(event);
-    if (!m_clockLabel) {
+    if (m_clockLabel) {
-        return;
+        m_clockLabel->setText(QTime::currentTime().toString(FRAMELESSHELPER_STRING_LITERAL("hh:mm:ss")));
+    }
+}
+
+void Widget::showEvent(QShowEvent *event)
+{
+    FramelessWidget::showEvent(event);
+    static bool exposed = false;
+    if (!exposed) {
+        exposed = true;
+        FramelessWidgetsHelper::get(this)->moveWindowToDesktopCenter();
     }
-    m_clockLabel->setText(QTime::currentTime().toString(FRAMELESSHELPER_STRING_LITERAL("hh:mm:ss")));
 }
 
 void Widget::initialize()

examples/widget/widget.h

@@ -45,6 +45,7 @@ public:
 
 protected:
     void timerEvent(QTimerEvent *event) override;
+    void showEvent(QShowEvent *event) override;
 
 private:
     void initialize();

src/quick/framelessquickhelper.cpp

@@ -728,6 +728,7 @@ void FramelessQuickHelper::itemChange(const ItemChange change, const ItemChangeD
         }
         Q_D(FramelessQuickHelper);
         d->attachToWindow();
+        d->moveWindowToDesktopCenter(); // Temp hack
     }
 }