Merge pull request #135 from SenecaCDOT-BigBlueButton/improve-present-leftright-arrows

added disabled icons for left and right arrow buttons in presentation wi...

bigbluebutton-client/branding/default/style/css/BBBDefault.css

@@ -145,7 +145,7 @@ DataGrid {
   icon: Embed('assets/images/triangle.png');    
 }
 
-.presentationUploadButtonStyle, .presentationBackButtonStyle, .presentationForwardButtonStyle,
+.presentationUploadButtonStyle, .presentationBackButtonStyle, .presentationBackButtonDisabledStyle, .presentationForwardButtonStyle, .presentationForwardButtonDisabledStyle,
 .presentationFitToWidthButtonStyle, .presentationFitToPageButtonStyle 
 {
   textIndent: 0;
@@ -173,10 +173,18 @@ DataGrid {
   icon:   Embed('assets/images/left-arrow.png'); 
 }
 
+.presentationBackButtonDisabledStyle {
+	icon:   Embed('assets/images/left-arrow-disabled.png'); 
+}
+
 .presentationForwardButtonStyle {
   icon:   Embed('assets/images/right-arrow.png'); 
 }
 
+.presentationForwardButtonDisabledStyle {
+	icon:   Embed('assets/images/right-arrow-disabled.png'); 
+}
+
 .presentationFitToWidthButtonStyle {
   icon:   Embed('assets/images/fit-to-width.png'); 
 }

bigbluebutton-client/src/org/bigbluebutton/modules/present/ui/views/PresentationWindow.mxml

@@ -472,14 +472,18 @@ with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
 			private function disableSlideNavigationButtons(pageNumber:int):void {
 				if (pageNumber == 0) {
 					backButton.enabled = false;
+					backButton.styleName = "presentationBackButtonDisabledStyle";
 				} else {
 					backButton.enabled = true;
+					backButton.styleName = "presentationBackButtonStyle";
 				}
 				
 				if (pageNumber < slideView.slides.length - 1) {
 					forwardButton.enabled = true;
+					forwardButton.styleName = "presentationForwardButtonStyle";
 				} else {
 					forwardButton.enabled = false;
+					forwardButton.styleName = "presentationForwardButtonDisabledStyle";
 				}
 			}