Added Python versions of the Google Suggest and Drag Charm examples.

1 files changed, 99 insertions, 0 deletions

diff --git a/dragmove/dragmovecharm.py b/dragmove/dragmovecharm.py
new file mode 100644
index 0000000..81bfc49
--- /dev/null
+++ b/dragmove/dragmovecharm.py
@@ -0,0 +1,99 @@
+#############################################################################
+##
+## Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+## Contact: Qt Software Information (qt-info@nokia.com)
+##
+## This file is part of the Graphics Dojo project on Qt Labs.
+##
+## This file may be used under the terms of the GNU General Public
+## License version 2.0 or 3.0 as published by the Free Software Foundation
+## and appearing in the file LICENSE.GPL included in the packaging of
+## this file.  Please review the following information to ensure GNU
+## General Public Licensing requirements will be met:
+## http://www.fsf.org/licensing/licenses/info/GPLv2.html and
+## http://www.gnu.org/copyleft/gpl.html.
+##
+## If you are unsure which license is appropriate for your use, please
+## contact the sales department at qt-sales@nokia.com.
+##
+## This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+## WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+##
+#############################################################################
+
+from PyQt4.QtCore import QEvent, QObject, QPoint, Qt
+from PyQt4.QtGui import QMouseEvent, QWidget
+
+class DragMoveData:
+    def __init__(self):
+        self.isMoving = False
+        self.startDrag = QPoint()
+
+class DragMoveCharm(QObject):
+
+    def __init__(self, parent = None):
+    
+        QObject.__init__(self, parent)
+        self.dragMoveData = {}
+    
+    def activateOn(self, widget):
+    
+        if widget in self.dragMoveData:
+            return
+        
+        data = DragMoveData()
+        data.startDrag = QPoint(0, 0)
+        data.isMoving = False
+        self.dragMoveData[widget] = data
+        
+        widget.installEventFilter(self)
+    
+    def deactivateFrom(self, widget):
+    
+        del self.dragMoveData[widget]
+        self.dragMoveData.remove(widget)
+        widget.removeEventFilter(self)
+    
+    def eventFilter(self, object, event):
+    
+        if not isinstance(object, QWidget):
+            return False
+        
+        widget = object
+        
+        type = event.type()
+        if type != QEvent.MouseButtonPress and \
+            type != QEvent.MouseButtonRelease and \
+            type != QEvent.MouseMove:
+            return False
+        
+        if isinstance(event, QMouseEvent):
+            if event.modifiers() != Qt.NoModifier:
+                return False
+            button = event.button()
+            mouseEvent = event
+        
+        try:
+            data = self.dragMoveData[widget]
+        except KeyError:
+            return False
+        
+        consumed = False
+        
+        if type == QEvent.MouseButtonPress and button == Qt.LeftButton:
+            data.startDrag = QPoint(mouseEvent.globalPos())
+            data.isMoving = True
+            event.accept()
+            consumed = True
+        
+        if type == QEvent.MouseButtonRelease:
+            data.startDrag = QPoint(0, 0)
+            data.isMoving = False
+        
+        if type == QEvent.MouseMove and data.isMoving:
+            pos = mouseEvent.globalPos()
+            widget.move(widget.pos() + pos - data.startDrag)
+            data.startDrag = QPoint(pos)
+            consumed = True
+        
+        return consumed