Mercurial Repositories > eric / file diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/E5Gui/E5AnimatedWidget.py	Wed Aug 05 19:45:33 2015 +0200
@@ -0,0 +1,123 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2015 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing an animated widget.
+"""
+
+#
+# Code was inspired by qupzilla web browser
+#
+
+from __future__ import unicode_literals
+
+from PyQt5.QtCore import pyqtSlot, QTimeLine, QPoint
+from PyQt5.QtWidgets import QWidget
+
+
+class E5AnimatedWidget(QWidget):
+    """
+    Class implementing an animated widget.
+    """
+    DirectionDown = 0
+    DirectionUp = 1
+    
+    def __init__(self, direction=DirectionDown, duration=300, parent=None):
+        """
+        Constructor
+        
+        @param direction direction of the animation
+        @type int (one of DirectionDown or DirectionUp)
+        @param duration duration of the animation
+        @type int
+        @param parent reference to the parent widget
+        @type QWidget
+        """
+        super(E5AnimatedWidget, self).__init__(parent)
+        
+        self.__direction = direction
+        self.__stepHeight = 0.0
+        self.__stepY = 0.0
+        self.__startY = 0
+        self.__widget = QWidget(self)
+        
+        self.__timeline = QTimeLine(duration)
+        self.__timeline.setFrameRange(0, 100)
+        self.__timeline.frameChanged.connect(self.__animateFrame)
+        
+        self.setMaximumHeight(0)
+    
+    def widget(self):
+        """
+        Public method to get a reference to the animated widget.
+        
+        @return reference to the animated widget
+        @rtype QWidget
+        """
+    
+    @pyqtSlot()
+    def startAnimation(self):
+        """
+        Public slot to start the animation.
+        """
+        if self.__timeline.state() == QTimeLine.Running:
+            return
+        
+        shown = 0
+        hidden = 0
+        
+        if self.__direction == self.DirectionDown:
+            shown = 0
+            hidden = -self.__widget.height()
+        
+        self.__widget.move(QPoint(self.__widget.pos().x(), hidden))
+        
+        self.__stepY = (hidden - shown) / 100.0
+        self.__startY = hidden
+        self.__stepHeight = self.__widget.height() / 100.0
+        
+        self.__timeline.setDirection(QTimeLine.Forward)
+        self.__timeline.start()
+    
+    @pyqtSlot(int)
+    def __animateFrame(self, frame):
+        """
+        Private slot to animate the next frame.
+        
+        @param frame frame number
+        @type int
+        """
+        self.setFixedHeight(frame * self.__stepHeight)
+        self.__widget.move(self.pos().x(),
+                           self.__startY - frame * self.__stepY)
+    
+    @pyqtSlot()
+    def hide(self):
+        """
+        Public slot to hide the animated widget.
+        """
+        if self.__timeline.state() == QTimeLine.Running:
+            return
+        
+        self.__timeline.setDirection(QTimeLine.Backward)
+        self.__timeline.start()
+        
+        self.__timeline.finished.connect(self.close)
+        
+        p = self.parentWidget()
+        if p is not None:
+            p.setFocus()
+    
+    def resizeEvent(self, evt):
+        """
+        Protected method to handle a resize event.
+        
+        @param evt reference to the event object
+        @type QResizeEvent
+        """
+        if evt.size().width() != self.__widget.width():
+            self.__widget.resize(evt.size().width(), self.__widget.height())
+        
+        super(E5AnimatedWidget, self).resizeEvent(evt)