Keep item in slidecontroller in sync with presentation, and detect external slide changes.

openlp/core/lib/eventreceiver.py

@@ -86,6 +86,9 @@ class EventReceiver(QtCore.QObject):
 
     ``config_updated``
         Informs components the config has changed
+        
+    ``slidecontroller_change``
+        Informs the slidecontroller that a slide change has occurred
     """
     global log
     log = logging.getLogger(u'EventReceiver')

openlp/core/ui/slidecontroller.py

@@ -224,6 +224,8 @@ class SlideController(QtGui.QWidget):
             QtCore.SIGNAL(u'slidecontroller_previous'), self.onSlideSelectedPrevious)
         QtCore.QObject.connect(Receiver.get_receiver(),
             QtCore.SIGNAL(u'slidecontroller_last'), self.onSlideSelectedLast)
+        QtCore.QObject.connect(Receiver.get_receiver(),
+            QtCore.SIGNAL(u'slidecontroller_change'), self.onSlideChange)
 
     def receiveSpinDelay(self, value):
         self.DelaySpinBox.setValue(int(value))
@@ -389,14 +391,25 @@ class SlideController(QtGui.QWidget):
                 log.info(u'Slide Rendering took %4s' % (time.time() - before))
                 if self.isLive:
                     self.parent.mainDisplay.frameView(frame)
-    
-    def grabMainDisplay(self):
-        winid = QtGui.QApplication.desktop().winId()
-        rm = self.parent.RenderManager
-        rect = rm.screen_list[rm.current_display][u'size']
-        winimg = QtGui.QPixmap.grabWindow(winid, rect.x(), rect.y(), rect.width(), rect.height())
-        self.SlidePreview.setPixmap(winimg)        
 
+    def onSlideChange(self, row):
+        """
+        The slide has been changed. Update the slidecontroller accordingly
+        """
+        self.PreviewListWidget.selectRow(row)
+        QtCore.QTimer.singleShot(0.5, self.grabMainDisplay)
+
+    def grabMainDisplay(self):
+        rm = self.parent.RenderManager
+        if not rm.screen_list[rm.current_display][u'primary']:
+            winid = QtGui.QApplication.desktop().winId()
+            rect = rm.screen_list[rm.current_display][u'size']
+            winimg = QtGui.QPixmap.grabWindow(winid, rect.x(), rect.y(), rect.width(), rect.height())
+            self.SlidePreview.setPixmap(winimg)        
+        else:
+            label = self.PreviewListWidget.cellWidget(self.PreviewListWidget.currentRow(), 0)
+            self.SlidePreview.setPixmap(label.pixmap())
+            
     def onSlideSelectedNext(self):
         """
         Go to the next slide.

openlp/plugins/presentations/lib/messagelistener.py

@@ -68,6 +68,7 @@ class MessageListener(object):
         self.controller.load_presentation(file)
         self.controller.start_presentation()
         self.controller.slidenumber = 0
+        self.controller.timer.start()
 
     def activate(self):
         if self.controller.is_active():
@@ -82,7 +83,7 @@ class MessageListener(object):
         self.activate()
         if message is not None:
             self.controller.goto_slide(message[0]+1)
-            self.controller.slidenumber = self.controller.get_slide_number()
+            self.controller.poll_slidenumber()
 
     def first(self, message):
         """
@@ -90,7 +91,7 @@ class MessageListener(object):
         """
         self.activate()
         self.controller.start_presentation()
-        self.controller.slidenumber = self.controller.get_slide_number()
+        self.controller.poll_slidenumber()
 
     def last(self, message):
         """
@@ -98,7 +99,7 @@ class MessageListener(object):
         """
         self.activate()
         self.controller.goto_slide(self.controller.get_slide_count())
-        self.controller.slidenumber = self.controller.get_slide_number()
+        self.controller.poll_slidenumber()
 
     def next(self, message):
         """
@@ -106,7 +107,7 @@ class MessageListener(object):
         """
         self.activate()
         self.controller.next_step()
-        self.controller.slidenumber = self.controller.get_slide_number()
+        self.controller.poll_slidenumber()
 
     def previous(self, message):
         """
@@ -114,7 +115,7 @@ class MessageListener(object):
         """
         self.activate()
         self.controller.previous_step()
-        self.controller.slidenumber = self.controller.get_slide_number()
+        self.controller.poll_slidenumber()
 
     def shutdown(self, message):
         """
@@ -122,6 +123,7 @@ class MessageListener(object):
         """
         self.controller.close_presentation()
         self.controller.slidenumber = 0
+        self.controller.timer.shutdown()
 
     def blank(self):
         if not self.controller.is_loaded():

openlp/plugins/presentations/lib/presentationcontroller.py

@@ -24,6 +24,8 @@ import shutil
 
 from PyQt4 import QtCore
 
+from openlp.core.lib import Receiver
+
 class PresentationController(object):
     """
     Base class for presentation controllers to inherit from
@@ -143,6 +145,9 @@ class PresentationController(object):
         self.thumbnailprefix = u'slide'
         if not os.path.isdir(self.thumbnailroot):
             os.makedirs(self.thumbnailroot)
+        self.timer = QtCore.QTimer()
+        self.timer.setInterval(500)
+        QtCore.QObject.connect(self.timer, QtCore.SIGNAL("timeout()"), self.poll_slidenumber)
 
     def check_available(self):
         """
@@ -291,3 +296,16 @@ class PresentationController(object):
             The slide an image is required for, starting at 1
         """
         return None
+
+    def poll_slidenumber(self):
+        """
+        Check the current slide number
+        """
+        if not self.is_active():
+            return
+        current = self.get_slide_number()
+        if current == self.slidenumber:
+            return
+        self.slidenumber = current
+        Receiver().send_message(u'slidecontroller_change', self.slidenumber - 1)
+