Attempt to detect silly user errors, like closing down PowerPoint/PPTViewer whilst halfway through a presentation.

openlp/plugins/presentations/lib/impresscontroller.py

@@ -79,7 +79,11 @@ class ImpressController(PresentationController):
         when required.
         """
         log.debug(u'start Openoffice')
-        if os.name != u'nt':
+        if os.name == u'nt':
+            self.manager = self.get_com_servicemanager()
+            self.manager._FlagAsMethod(u'Bridge_GetStruct')
+            self.manager._FlagAsMethod(u'Bridge_GetValueObject')
+        else:
             # -headless
             cmd = u'openoffice.org -nologo -norestore -minimized -invisible ' + u'"' + u'-accept=socket,host=localhost,port=2002;urp;'+ u'"'
             self.process = QtCore.QProcess()
@@ -108,6 +112,9 @@ class ImpressController(PresentationController):
         self.store_filename(presentation)
         if os.name == u'nt':
             desktop = self.get_com_desktop()
+            if desktop is None:
+                self.start_process()
+                desktop = self.get_com_desktop()
             url = u'file:///' + presentation.replace(u'\\', u'/').replace(u':', u'|').replace(u' ', u'%20')
         else:
             desktop = self.get_uno_desktop()
@@ -169,7 +176,7 @@ class ImpressController(PresentationController):
             try:
                 ctx = resolver.resolve(u'uno:socket,host=localhost,port=2002;urp;StarOffice.ComponentContext')
             except:
-                self.startOpenoffice()
+                self.start_process()
                 loop += 1
         try:
             self.manager = ctx.ServiceManager
@@ -183,14 +190,11 @@ class ImpressController(PresentationController):
     def get_com_desktop(self):
         log.debug(u'getCOMDesktop')
         try:
-            self.manager = self.get_com_servicemanager()
-            self.manager._FlagAsMethod(u'Bridge_GetStruct')
-            self.manager._FlagAsMethod(u'Bridge_GetValueObject')
             desktop = self.manager.createInstance(u'com.sun.star.frame.Desktop')
             return desktop
         except:
             log.exception(u'Failed to get COM desktop')
-            return None
+        return None
 
     def get_com_servicemanager(self):
         log.debug(u'get_com_servicemanager')

openlp/plugins/presentations/lib/messagelistener.py

@@ -64,74 +64,74 @@ class MessageListener(object):
         self.handler, file = self.decodeMessage(message)
         self.controller = self.controllers[self.handler]
         if self.controller.is_loaded():
-            self.shutdown()
+            self.shutdown(None)
         self.controller.load_presentation(file)
+        self.controller.slidenumber = 0
 
+    def activate(self):
+        if self.controller.is_active():
+            return
+        if not self.controller.is_loaded():
+            self.controller.load_presentation(self.controller.filepath)
+        else:
+            self.controller.start_presentation()
+        if self.controller.slidenumber > 1:
+            self.controller.goto_slide(self.controller.slidenumber)
+        
     def slide(self, message):
-        #if not self.controller.is_loaded():
+        self.activate()
-        #    return
+        if message is not None:
-        #if not self.controller.is_active():
+            self.controller.goto_slide(message[0])
-        #    self.controller.start_presentation()
+            self.controller.slidenumber = self.controller.get_slide_number()
-        self.controller.goto_slide(message[0])
 
     def first(self, message):
         """
         Based on the handler passed at startup triggers the first slide
         """
-        #if not self.controller.is_loaded():
+        self.activate()
-        #    return
         self.controller.start_presentation()
+        self.controller.slidenumber = self.controller.get_slide_number()
 
     def last(self, message):
         """
         Based on the handler passed at startup triggers the first slide
         """
-        #if not self.controller.is_loaded():
+        self.activate()
-        #    return
-        #if not self.controller.is_active():
-        #    self.controller.start_presentation()
         self.controller.goto_slide(self.controller.get_slide_count())
+        self.controller.slidenumber = self.controller.get_slide_number()
 
     def next(self, message):
         """
         Based on the handler passed at startup triggers the next slide event
         """
-        #if not self.controller.is_loaded():
+        self.activate()
-        #    return
-        #if not self.controller.is_active():
-        #    self.controller.start_presentation()
-        #    self.controller.goto_slide(self.controller.current_slide)
         self.controller.next_step()
+        self.controller.slidenumber = self.controller.get_slide_number()
 
     def previous(self, message):
         """
         Based on the handler passed at startup triggers the previous slide event
         """
-        #if not self.controller.is_loaded():
+        self.activate()
-        #    return
-        #if not self.controller.is_active():
-        #    self.controller.start_presentation()
-        #    self.controller.goto_slide(self.controller.current_slide)
         self.controller.previous_step()
+        self.controller.slidenumber = self.controller.get_slide_number()
 
     def shutdown(self, message):
         """
         Based on the handler passed at startup triggers slide show to shut down
         """
         self.controller.close_presentation()
+        self.controller.slidenumber = 0
 
     def blank(self):
-        #if not self.controller.is_loaded():
+        if not self.controller.is_loaded():
-        #    return
+            return
-        #if not self.controller.is_active():
+        if not self.controller.is_active():
-        #    self.controller.start_presentation()
+            return
         self.controller.blank_screen()        
 
     def unblank(self):
-        #if not self.controller.is_loaded():
+        self.activate()
-        #    return
-        #if not self.controller.is_active():
-        #    self.controller.start_presentation()
         self.controller.unblank_screen()        
 
     def decodeMessage(self, message):

openlp/plugins/presentations/lib/powerpointcontroller.py

@@ -80,16 +80,27 @@ class PowerpointController(PresentationController):
             """
             Returns true if a presentation is loaded
             """
-            if self.process is None:
+            try:
-                return False
+                if not self.process.Visible:
-            if self.process.Windows.Count == 0:
+                    return False
+                if self.process.Windows.Count == 0:
+                    return False
+                if self.process.Presentations.Count == 0:
+                    return False
+            except:
                 return False
+            return True
         
         def kill(self):
             """
             Called at system exit to clean up any running presentations
-            """            
+            """
-            self.process.Quit()
+            if self.process is None:
+                return
+            try:
+                self.process.Quit()
+            except:
+                pass
             self.process = None
 
         def load_presentation(self, presentation):
@@ -105,7 +116,15 @@ class PowerpointController(PresentationController):
             """            
             log.debug(u'LoadPresentation')
             self.store_filename(presentation)
-            self.process.Presentations.Open(presentation, False, False, True)
+            try:
+                if not self.process.Visible:
+                    self.start_process()
+            except:
+                self.start_process()
+            try:
+                self.process.Presentations.Open(presentation, False, False, True)
+            except:
+                return
             self.presentation = self.process.Presentations(self.process.Presentations.Count)
             self.create_thumbnails()
             self.start_presentation()
@@ -124,15 +143,18 @@ class PowerpointController(PresentationController):
             self.presentation.Export(os.path.join(self.thumbnailpath, '')
                                      , 'png', 600, 480)
             
-    
-
         def close_presentation(self):
             """
             Close presentation and clean up objects
             Triggerent by new object being added to SlideController orOpenLP
             being shut down
             """
-            self.presentation.Close()
+            if self.presentation == None:
+                return
+            try:
+                self.presentation.Close()
+            except:
+                pass
             self.presentation = None
 
         def is_active(self):
@@ -141,9 +163,12 @@ class PowerpointController(PresentationController):
             """
             if not self.is_loaded():
                 return False
-            if self.presentation.SlideShowWindow == None:
+            try:
-                return False
+                if self.presentation.SlideShowWindow == None:
-            if self.presentation.SlideShowWindow.View == None:
+                    return False
+                if self.presentation.SlideShowWindow.View == None:
+                    return False
+            except:
                 return False
             return True
 
@@ -171,12 +196,18 @@ class PowerpointController(PresentationController):
             """
             Starts a presentation from the beginning
             """            
+            #SlideShowWindow measures its size/position by points, not pixels
+            try:
+                dpi = win32ui.GetActiveWindow().GetDC().GetDeviceCaps(88)
+            except:
+                try:
+                    dpi = win32ui.GetForegroundWindow().GetDC().GetDeviceCaps(88)
+                except:
+                    dpi = 96
             self.presentation.SlideShowSettings.Run()
             self.presentation.SlideShowWindow.View.GotoSlide(1)
             rendermanager = self.plugin.render_manager
             rect = rendermanager.screen_list[rendermanager.current_display][u'size']
-            #SlideShowWindow measures its size/position by points, not pixels
-            dpi = win32ui.GetActiveWindow().GetDC().GetDeviceCaps(88)
             self.presentation.SlideShowWindow.Top = rect.y() * 72 / dpi
             self.presentation.SlideShowWindow.Height = rect.height() * 72 / dpi
             self.presentation.SlideShowWindow.Left = rect.x() * 72 / dpi
@@ -221,3 +252,4 @@ class PowerpointController(PresentationController):
             """
             return os.path.join(self.thumbnailpath,
                 self.thumbnailprefix + unicode(slide_no) + u'.png')
+\

openlp/plugins/presentations/lib/pptviewcontroller.py

@@ -128,13 +128,17 @@ class PptviewController(PresentationController):
             """
             Returns true if a presentation is loaded
             """
-            return self.pptid >= 0
+            if self.pptid < 0:
+                return False
+            if self.get_slide_count() < 0:
+                return False
+            return True
         
         def is_active(self):
             """
             Returns true if a presentation is currently active
             """
-            return self.pptid >= 0
+            return self.is_loaded()
 
         def blank_screen(self):
             """

openlp/plugins/presentations/lib/presentationcontroller.py

@@ -132,6 +132,7 @@ class PresentationController(object):
         self.plugin = plugin
         self.name = name
         self.available = self.check_available()
+        self.slidenumber = 0
         if self.available:
             self.enabled = int(plugin.config.get_config(
                 name, QtCore.Qt.Unchecked)) == QtCore.Qt.Checked