implement Dialog window

components/dialog.cpp

@@ -1,6 +1,10 @@
 #include "dialog.h"
 #include "dialog_p.h"
 #include <QPainter>
+#include <QApplication>
+#include <QStateMachine>
+#include <QSignalTransition>
+#include <QPropertyAnimation>
 #include <QEvent>
 #include <QPushButton>
 #include <QGraphicsDropShadowEffect>
@@ -8,7 +12,10 @@
 #include "dialog_internal.h"
 
 DialogPrivate::DialogPrivate(Dialog *q)
-    : q_ptr(q)
+    : q_ptr(q),
+      machine(new QStateMachine(q)),
+      window(new DialogWindow(q)),
+      proxy(new TransparencyProxy)
 {
 }
 
@@ -21,15 +28,12 @@ void DialogPrivate::init()
 
     QWidget *widget = new QWidget;
 
-    proxy = new TransparencyProxy;
     widget->setLayout(proxy);
     layout->addWidget(widget);
     layout->setAlignment(widget, Qt::AlignCenter);
 
     widget->setMinimumWidth(400);
-    widget->setMinimumHeight(400);
 
-    window = new DialogWindow(q);
     proxy->setWidget(window);
 
     QGraphicsDropShadowEffect *effect = new QGraphicsDropShadowEffect;
@@ -38,54 +42,55 @@ void DialogPrivate::init()
     effect->setOffset(0, 13);
     widget->setGraphicsEffect(effect);
 
-/*
-    {
-        QVBoxLayout *layout = new QVBoxLayout;
-        window->setLayout(layout);
-
-        QPushButton *button = new QPushButton;
-        button->setText("Hello test!");
-        layout->addWidget(button);
-
-        button = new QPushButton;
-        button->setText("Hello test!");
-        layout->addWidget(button);
-
-        button = new QPushButton;
-        button->setText("Hello test!");
-        layout->addWidget(button);
-
-        button = new QPushButton;
-        button->setText("Hello test!");
-        layout->addWidget(button);
-
-        button = new QPushButton;
-        button->setText("Hello test!");
-        layout->addWidget(button);
-    }
-    */
-
     //
 
-    proxy->setCurrentIndex(1);
+    QState *hiddenState = new QState;
+    QState *visibleState = new QState;
 
-    //
+    machine->addState(hiddenState);
+    machine->addState(visibleState);
 
+    machine->setInitialState(hiddenState);
 
+    QSignalTransition *transition;
 
-    QPushButton *btn;
+    transition = new QSignalTransition(window, SIGNAL(dialogActivated()));
+    transition->setTargetState(visibleState);
+    hiddenState->addTransition(transition);
 
-    btn = new QPushButton;
+    transition = new QSignalTransition(window, SIGNAL(dialogDeactivated()));
-    btn->setText("One");
+    transition->setTargetState(hiddenState);
-    layout->addWidget(btn);
+    visibleState->addTransition(transition);
 
-    QObject::connect(btn, SIGNAL(pressed()), q, SLOT(pressOne()));
+    visibleState->assignProperty(proxy, "opacity", 1);
+    visibleState->assignProperty(effect, "color", QColor(0, 0, 0, 200));
+    visibleState->assignProperty(window, "offset", 0);
+    hiddenState->assignProperty(proxy, "opacity", 0);
+    hiddenState->assignProperty(effect, "color", QColor(0, 0, 0, 0));
+    hiddenState->assignProperty(window, "offset", 200);
 
-    btn = new QPushButton;
+    QObject::connect(proxy, SIGNAL(opacityChanged()), q, SLOT(update()));
-    btn->setText("Two");
-    layout->addWidget(btn);
 
-    QObject::connect(btn, SIGNAL(pressed()), q, SLOT(pressTwo()));
+    QPropertyAnimation *animation;
+
+    animation = new QPropertyAnimation(proxy, "opacity");
+    animation->setDuration(280);
+    machine->addDefaultAnimation(animation);
+
+    animation = new QPropertyAnimation(effect, "color");
+    animation->setDuration(280);
+    machine->addDefaultAnimation(animation);
+
+    animation = new QPropertyAnimation(window, "offset");
+    animation->setDuration(280);
+    animation->setEasingCurve(QEasingCurve::OutCirc);
+    machine->addDefaultAnimation(animation);
+
+    QObject::connect(visibleState, SIGNAL(propertiesAssigned()), q, SLOT(acceptMouseEvents()));
+
+    machine->start();
+
+    QCoreApplication::processEvents();
 }
 
 Dialog::Dialog(QWidget *parent)
@@ -113,18 +118,24 @@ void Dialog::setWindowLayout(QLayout *layout)
     d->window->setLayout(layout);
 }
 
-void Dialog::pressOne()
+void Dialog::showDialog()
 {
     Q_D(Dialog);
 
-    d->proxy->setOpaque();
+    emit d->window->dialogActivated();
 }
 
-void Dialog::pressTwo()
+void Dialog::hideDialog()
 {
     Q_D(Dialog);
 
-    d->proxy->setOpacity(0.5);
+    emit d->window->dialogDeactivated();
+    setAttribute(Qt::WA_TransparentForMouseEvents);
+}
+
+void Dialog::acceptMouseEvents()
+{
+    setAttribute(Qt::WA_TransparentForMouseEvents, false);
 }
 
 bool Dialog::event(QEvent *event)
@@ -176,21 +187,16 @@ void Dialog::paintEvent(QPaintEvent *event)
 {
     Q_UNUSED(event)
 
+    Q_D(Dialog);
+
     QPainter painter(this);
 
-    //QPen pen;
-    //pen.setColor(Qt::blue);
-    //pen.setWidth(3);
-    //painter.setPen(pen);
-
-    //painter.drawRect(rect());
-
     QBrush brush;
     brush.setStyle(Qt::SolidPattern);
     brush.setColor(Qt::black);
     painter.setBrush(brush);
     painter.setPen(Qt::NoPen);
-    painter.setOpacity(0.5);
+    painter.setOpacity(d->proxy->opacity()/2);
 
     painter.drawRect(rect());
 }

components/dialog.h

@@ -17,8 +17,9 @@ public:
     void setWindowLayout(QLayout *layout);
 
 protected slots:
-    void pressOne();
+    void showDialog();
-    void pressTwo();
+    void hideDialog();
+    void acceptMouseEvents();
 
 protected:
     bool event(QEvent *event) Q_DECL_OVERRIDE;

components/dialog_internal.cpp

@@ -1,9 +1,11 @@
 #include "dialog_internal.h"
 #include <QPainter>
+#include <QLayout>
 #include "dialog.h"
 
-DialogWindow::DialogWindow(QWidget *parent)
+DialogWindow::DialogWindow(Dialog *dialog, QWidget *parent)
-    : QWidget(parent)
+    : QWidget(parent),
+      dialog(dialog)
 {
 }
 
@@ -11,6 +13,18 @@ DialogWindow::~DialogWindow()
 {
 }
 
+void DialogWindow::setOffset(int offset)
+{
+    QMargins margins = dialog->layout()->contentsMargins();
+    margins.setBottom(offset);
+    dialog->layout()->setContentsMargins(margins);
+}
+
+int DialogWindow::offset() const
+{
+    return dialog->layout()->contentsMargins().bottom();
+}
+
 void DialogWindow::paintEvent(QPaintEvent *event)
 {
     Q_UNUSED(event)

components/dialog_internal.h

@@ -3,21 +3,33 @@
 
 #include <QWidget>
 
+class QStateMachine;
 class Dialog;
 
 class DialogWindow : public QWidget
 {
     Q_OBJECT
 
+    Q_PROPERTY(int offset WRITE setOffset READ offset)
+
 public:
-    DialogWindow(QWidget *parent = 0);
+    explicit DialogWindow(Dialog *dialog, QWidget *parent = 0);
     ~DialogWindow();
 
+    void setOffset(int offset);
+    int offset() const;
+
+signals:
+    void dialogActivated();
+    void dialogDeactivated();
+
 protected:
     void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
 
 private:
     Q_DISABLE_COPY(DialogWindow)
+
+    Dialog *const dialog;
 };
 
 //#include <QWidget>

components/dialog_p.h

@@ -3,6 +3,7 @@
 
 #include <QObject>
 
+class QStateMachine;
 class Dialog;
 class DialogWindow;
 class TransparencyProxy;
@@ -17,9 +18,10 @@ public:
 
     void init();
 
-    Dialog *const q_ptr;
+    Dialog            *const q_ptr;
-    DialogWindow *window;
+    QStateMachine     *const machine;
-    TransparencyProxy *proxy;
+    DialogWindow      *const window;
+    TransparencyProxy *const proxy;
 };
 
 #endif // DIALOG_P_H

lib/transparencyproxy.cpp

@@ -61,6 +61,8 @@ void TransparencyProxy::setOpaque()
 
     d->proxy->setOpacity(1);
     setCurrentIndex(0);
+
+    emit opacityChanged();
 }
 
 void TransparencyProxy::setOpacity(qreal opacity)
@@ -71,6 +73,19 @@ void TransparencyProxy::setOpacity(qreal opacity)
         return;
     }
 
+    if (1 == opacity) {
+        return setOpaque();
+    }
+
     d->proxy->setOpacity(opacity);
     setCurrentIndex(1);
+
+    emit opacityChanged();
+}
+
+qreal TransparencyProxy::opacity() const
+{
+    Q_D(const TransparencyProxy);
+
+    return d->proxy->opacity();
 }

lib/transparencyproxy.h

@@ -10,6 +10,8 @@ class TransparencyProxy : public QStackedLayout
 {
     Q_OBJECT
 
+    Q_PROPERTY(qreal opacity WRITE setOpacity READ opacity NOTIFY opacityChanged)
+
 public:
     TransparencyProxy();
     ~TransparencyProxy();
@@ -18,6 +20,10 @@ public:
 
     void setOpaque();
     void setOpacity(qreal opacity);
+    qreal opacity() const;
+
+signals:
+    void opacityChanged();
 
 protected:
     const QScopedPointer<TransparencyProxyPrivate> d_ptr;

lib/transparencyproxy_internal.cpp

@@ -4,7 +4,7 @@
 ProxyWidget::ProxyWidget(QWidget *widget, QWidget *parent)
     : QWidget(parent),
       _widget(widget),
-      _opacity(1.0)
+      _opacity(0)
 {
 }
 
@@ -18,15 +18,17 @@ void ProxyWidget::paintEvent(QPaintEvent *event)
 
     QPainter painter(this);
 
-    //QPen pen;
-    //pen.setColor(Qt::red);
-    //pen.setWidth(5);
-    //painter.setPen(pen);
-
-    //painter.drawRect(rect());
-
     painter.setOpacity(_opacity);
 
     QPixmap pixmap = _widget->grab(rect());
     painter.drawPixmap(rect(), pixmap);
+
+#ifdef DEBUG_LAYOUT
+    QPen pen;
+    pen.setColor(Qt::red);
+    pen.setWidth(5);
+    painter.setPen(pen);
+
+    painter.drawRect(rect());
+#endif
 }

mainwindow.cpp

@@ -98,6 +98,24 @@ MainWindow::MainWindow(QWidget *parent)
 
         layout->addWidget(btn);
         layout->addWidget(btn2);
+
+        {
+            QPushButton *btn;
+
+            btn = new QPushButton;
+            btn->setParent(this);
+            btn->setText("Show");
+            btn->setGeometry(190, 80, 140, 40);
+
+            QObject::connect(btn, SIGNAL(pressed()), dialog, SLOT(showDialog()));
+
+            btn = new QPushButton;
+            btn->setParent(this);
+            btn->setText("Hide");
+            btn->setGeometry(370, 80, 140, 40);
+
+            QObject::connect(btn, SIGNAL(pressed()), dialog, SLOT(hideDialog()));
+        }
     }
 
 }