Add Alt+Shift+G shortcut to toogle the pixel grid visibility (fix #504)

data/gui.xml

@@ -88,6 +88,7 @@
       <key command="SplitEditorHorizontally" shortcut="Ctrl+3" mac="Cmd+3" />
       <key command="Preview" shortcut="F8" />
       <key command="ShowGrid" shortcut="Shift+G" />
+      <key command="ShowPixelGrid" shortcut="Alt+Shift+G" />
       <key command="SnapToGrid" shortcut="Shift+S" />
       <key command="ShowOnionSkin" shortcut="F3" />
       <key command="Timeline" shortcut="Tab">

src/app/commands/cmd_grid.cpp

@@ -67,6 +67,33 @@ protected:
   }
 };
 
+class ShowPixelGridCommand : public Command {
+public:
+  ShowPixelGridCommand()
+    : Command("ShowPixelGrid",
+              "Show Pixel Grid",
+              CmdUIOnlyFlag)
+  {
+  }
+
+  Command* clone() const override { return new ShowPixelGridCommand(*this); }
+
+protected:
+  bool onChecked(Context* context)
+  {
+    IDocumentSettings* docSettings = context->settings()->getDocumentSettings(context->activeDocument());
+
+    return docSettings->getPixelGridVisible();
+  }
+
+  void onExecute(Context* context)
+  {
+    IDocumentSettings* docSettings = context->settings()->getDocumentSettings(context->activeDocument());
+
+    docSettings->setPixelGridVisible(docSettings->getPixelGridVisible() ? false: true);
+  }
+};
+
 class SnapToGridCommand : public Command {
 public:
   SnapToGridCommand()
@@ -158,6 +185,11 @@ Command* CommandFactory::createShowGridCommand()
   return new ShowGridCommand;
 }
 
+Command* CommandFactory::createShowPixelGridCommand()
+{
+  return new ShowPixelGridCommand;
+}
+
 Command* CommandFactory::createSnapToGridCommand()
 {
   return new SnapToGridCommand;

src/app/commands/commands_list.h

@@ -102,6 +102,7 @@ FOR_EACH_COMMAND(Scroll)
 FOR_EACH_COMMAND(SetPalette)
 FOR_EACH_COMMAND(ShowGrid)
 FOR_EACH_COMMAND(ShowOnionSkin)
+FOR_EACH_COMMAND(ShowPixelGrid)
 FOR_EACH_COMMAND(SnapToGrid)
 FOR_EACH_COMMAND(SplitEditorHorizontally)
 FOR_EACH_COMMAND(SplitEditorVertically)