PatchCanvas: remove abstract line, add fade-anim class

src/patchcanvas.py

@@ -18,7 +18,7 @@
 
 # Imports (Global)
 from PyQt4.QtCore import pyqtSlot, qDebug, qCritical, qFatal, Qt, QObject, SIGNAL, SLOT
-from PyQt4.QtCore import QLineF, QPointF, QRectF, QSettings, QTimer
+from PyQt4.QtCore import QAbstractAnimation, QLineF, QPointF, QRectF, QSettings, QTimer
 from PyQt4.QtGui import QColor, QLinearGradient, QPen, QPolygonF, QPainter, QPainterPath
 from PyQt4.QtGui import QCursor, QFont, QFontMetrics, QInputDialog, QLineEdit, QMenu
 from PyQt4.QtGui import QGraphicsScene, QGraphicsItem, QGraphicsLineItem, QGraphicsPathItem
@@ -1120,32 +1120,41 @@ class PatchScene(QGraphicsScene):
         QGraphicsScene.wheelEvent(self, event)
 
 # ------------------------------------------------------------------------------
-# abstractcanvasline.h
-# NOTE - unused
+# canvasfadeanimation.cpp
 
-class AbstractCanvasLine(object):
-    def __init__(self):
-        object.__init__(self)
+class CanvasFadeAnimation(QAbstractAnimation):
+    def __init__(self, item, show, parent=None):
+        QAbstractAnimation.__init__(self, parent)
 
-    def deleteFromScene(self):
-        pass
+        self.m_show = show
+        self.m_duration = 0
+        self.m_item = item
 
-    def isLocked(self):
-        return False
+    def setDuration(self, time):
+        if (self.m_show == False and self.m_item.opacity() == 0):
+          self._duration = 0
+        else:
+          self.m_item.show()
+          self.m_duration = time
 
-    def setLocked(self, yesno):
-        pass
+    def duration(self):
+        return self.m_duration
 
-    def isLineSelected(self):
-        return False
+    def updateCurrentTime(self, time):
+        if (self.m_duration == 0):
+          return
 
-    def setLineSelected(self, yesno):
-        pass
+        if (self.m_show):
+          value = float(time)/self.m_duration
+        else:
+          value = 1.0-(float(time)/self.m_duration)
 
-    def updateLinePos(self):
+        self.m_item.setOpacity(value)
+
+    def updateDirection(self, direction):
         pass
 
-    def setZValue(self, z):
+    def updateState(self, oldState, newState):
         pass
 
 # ------------------------------------------------------------------------------