unified icon set used for PyLoT in order to match the license restriction

QtPyLoT.py

@@ -133,11 +133,13 @@ class MainWindow(QMainWindow):
 
         # create resource icons
         p_icon = QIcon()
-        p_icon.addPixmap(QPixmap(':/icons/picon.png'))
+        p_icon.addPixmap(QPixmap(':/icons/key_P.png'))
         s_icon = QIcon()
-        s_icon.addPixmap(QPixmap(':/icons/sicon.png'))
+        s_icon.addPixmap(QPixmap(':/icons/key_S.png'))
         print_icon = QIcon()
         print_icon.addPixmap(QPixmap(':/icons/printer.png'))
+        filter_icon = QIcon()
+        filter_icon.addPixmap(QPixmap(':/icons/filter.png'))
 
         newEventAction = self.createAction(self, "&New event ...",
                                            self.createNewEvent,
@@ -166,7 +168,7 @@ class MainWindow(QMainWindow):
                                        "Close event and quit PyLoT")
         self.filterAction = self.createAction(self, "&Filter ...",
                                               self.filterWaveformData,
-                                              "Ctrl+F", QIcon(":/filter.png"),
+                                              "Ctrl+F", filter_icon,
                                               """Toggle un-/filtered waveforms
                                          to be displayed, according to the
                                          desired seismic phase.""", True)
@@ -259,7 +261,7 @@ class MainWindow(QMainWindow):
         if recentEvents:
             for i, eventID in enumerate(recentEvents):
                 fname = fnConstructor(eventID)
-                action = QAction(QIcon(":/icon.png"),
+                action = QAction(self.windowIcon(),
                                  "&{0} {1}".format(i + 1,
                                                    QFileInfo(fname).fileName()),
                                  self)

icons.qrc

@@ -2,11 +2,21 @@
     <qresource>
 		<file>icons/pylot.ico</file>
 		<file>icons/printer.png</file>
-		<file>icons/picon.png</file>
-		<file>icons/sicon.png</file>
+		<file>icons/key_E.png</file>
+        <file>icons/key_N.png</file>
+        <file>icons/key_P.png</file>
+        <file>icons/key_Q.png</file>
+        <file>icons/key_R.png</file>
+        <file>icons/key_S.png</file>
+        <file>icons/key_T.png</file>
+        <file>icons/key_U.png</file>
+        <file>icons/key_V.png</file>
+        <file>icons/key_W.png</file>
+		<file>icons/key_Z.png</file>
 		<file>icons/pick.png</file>
         <file>icons/filter.png</file>
-        <file>icons/zoom.png</file>
+        <file>icons/zoom_in.png</file>
+        <file>icons/zoom_out.png</file>
     </qresource>
     <qresource prefix="/help">
         <file>help/index.html</file>

pylot/core/util/widgets.py

@@ -224,7 +224,7 @@ class PickDlg(QDialog):
         filter_icon = QIcon()
         filter_icon.addPixmap(QPixmap(':/icons/filter.png'))
         zoom_icon = QIcon()
-        zoom_icon.addPixmap(QPixmap(':/icons/zoom.png'))
+        zoom_icon.addPixmap(QPixmap(':/icons/zoom_in.png'))
 
         # create actions
         self.filterAction = createAction(parent=self, text='Filter',