support preview content

Change-Id: I61a65844a17c6cda152939cb327027ca8e3d9870

frame/frame.pro

@@ -8,7 +8,7 @@ DESTDIR         = $$_PRO_FILE_PWD_/../
 TEMPLATE        = app
 CONFIG         += c++11 link_pkgconfig
 
-PKGCONFIG += xcb-ewmh dtkwidget dtkbase dtkutil
+PKGCONFIG += xcb-ewmh dtkwidget dtkbase dtkutil x11
 
 SOURCES += main.cpp \
     window/mainwindow.cpp \
@@ -36,7 +36,8 @@ SOURCES += main.cpp \
     controller/dockpluginloader.cpp \
     item/containeritem.cpp \
     item/components/containerwidget.cpp \
-    dbus/dbusdockadaptors.cpp
+    dbus/dbusdockadaptors.cpp \
+    item/components/previewcontainer.cpp
 
 HEADERS  += \
     window/mainwindow.h \
@@ -64,7 +65,8 @@ HEADERS  += \
     controller/dockpluginloader.h \
     item/containeritem.h \
     item/components/containerwidget.h \
-    dbus/dbusdockadaptors.h
+    dbus/dbusdockadaptors.h \
+    item/components/previewcontainer.h
 
 dbus_service.files += com.deepin.dde.Dock.service
 dbus_service.path = /usr/share/dbus-1/services

frame/item/appitem.cpp

@@ -18,6 +18,7 @@ QPoint AppItem::MousePressPos;
 AppItem::AppItem(const QDBusObjectPath &entry, QWidget *parent)
     : DockItem(parent),
       m_appNameTips(new QLabel(this)),
+      m_appPreviewTips(new PreviewContainer(this)),
       m_itemEntry(new DBusDockEntry(entry.path(), this)),
       m_draging(false),
       m_launchingEffects(0.0),
@@ -247,10 +248,18 @@ void AppItem::mouseReleaseEvent(QMouseEvent *e)
         if (distance.manhattanLength() > APP_DRAG_THRESHOLD)
             return;
 
+#ifdef QT_DEBUG
+        const int windowCount = m_titles.size();
+        if (windowCount < 2)
+            m_itemEntry->Activate();
+        else
+            showPreview();
+#else
         m_itemEntry->Activate();
+#endif
 
-        if (!m_titles.isEmpty())
+//        if (!m_titles.isEmpty())
-            return;
+//            return;
 
         // start launching effects
         //m_launchingEffects = 0.0;
@@ -413,3 +422,10 @@ void AppItem::activeChanged()
 {
     m_active = !m_active;
 }
+
+void AppItem::showPreview()
+{
+    m_appPreviewTips->setWindowInfos(m_titles);
+
+    QTimer::singleShot(100, this, [=] { showPopupApplet(m_appPreviewTips); });
+}

frame/item/appitem.h

@@ -2,6 +2,7 @@
 #define APPITEM_H
 
 #include "dockitem.h"
+#include "components/previewcontainer.h"
 #include "dbus/dbusdockentry.h"
 #include "dbus/dbusclientmanager.h"
 
@@ -41,9 +42,11 @@ private slots:
     void updateTitle();
     void refershIcon();
     void activeChanged();
+    void showPreview();
 
 private:
     QLabel *m_appNameTips;
+    PreviewContainer *m_appPreviewTips;
     DBusDockEntry *m_itemEntry;
 
     bool m_draging;

frame/item/components/previewcontainer.cpp

@@ -0,0 +1,59 @@
+#include "previewcontainer.h"
+
+#include <QLabel>
+#include <QWindow>
+#include <QX11Info>
+
+#include <X11/Xlib.h>
+#include <X11/X.h>
+#include <X11/Xutil.h>
+
+PreviewContainer::PreviewContainer(QWidget *parent)
+    : QWidget(parent)
+{
+    m_windowListLayout = new QBoxLayout(QBoxLayout::LeftToRight);
+    m_windowListLayout->setMargin(0);
+    m_windowListLayout->setSpacing(5);
+
+    setLayout(m_windowListLayout);
+}
+
+void PreviewContainer::setWindowInfos(const WindowDict &infos)
+{
+    // TODO: optimize
+    while (QLayoutItem *item = m_windowListLayout->takeAt(0))
+    {
+        item->widget()->deleteLater();
+        delete item;
+    }
+
+    for (auto it(infos.cbegin()); it != infos.cend(); ++it)
+    {
+        XWindowAttributes attrs;
+        XGetWindowAttributes(QX11Info::display(), it.key(), &attrs);
+        XImage *ximage = XGetImage(QX11Info::display(), it.key(), 0, 0, attrs.width, attrs.height, AllPlanes, ZPixmap);
+        const QImage qimage((uchar*)(ximage->data), attrs.width, attrs.height, QImage::Format_ARGB32);
+        XDestroyImage(ximage);
+
+        QLabel *l = new QLabel;
+        l->setFixedSize(250, 200);
+        l->setPixmap(QPixmap::fromImage(qimage).scaled(250, 200, Qt::KeepAspectRatio, Qt::SmoothTransformation));
+        m_windowListLayout->addWidget(l);
+    }
+}
+
+void PreviewContainer::updateLayoutDirection(const Dock::Position dockPos)
+{
+    switch (dockPos)
+    {
+    case Dock::Top:
+    case Dock::Bottom:
+        m_windowListLayout->setDirection(QBoxLayout::LeftToRight);
+        break;
+
+    case Dock::Left:
+    case Dock::Right:
+        m_windowListLayout->setDirection(QBoxLayout::TopToBottom);
+        break;
+    }
+}

frame/item/components/previewcontainer.h

@@ -0,0 +1,27 @@
+#ifndef PREVIEWCONTAINER_H
+#define PREVIEWCONTAINER_H
+
+#include <QWidget>
+#include <QHBoxLayout>
+
+#include "dbus/dbusdockentry.h"
+#include "constants.h"
+
+class PreviewContainer : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit PreviewContainer(QWidget *parent = 0);
+
+public:
+    void setWindowInfos(const WindowDict &infos);
+
+public slots:
+    void updateLayoutDirection(const Dock::Position dockPos);
+
+private:
+    QBoxLayout *m_windowListLayout;
+};
+
+#endif // PREVIEWCONTAINER_H