T524: Added theme picker

resources/qml/Preferences/GeneralPage.qml

@@ -162,6 +162,74 @@ UM.PreferencesPage
             width: UM.Theme.getSize("default_margin").width
         }
 
+        Row
+        {
+            spacing: UM.Theme.getSize("default_margin").width
+            Label
+            {
+                id: themeLabel
+                text: catalog.i18nc("@label","Theme:")
+                anchors.verticalCenter: themeComboBox.verticalCenter
+            }
+
+            ComboBox
+            {
+                id: themeComboBox
+                model: ListModel
+                {
+                    id: themeList
+
+                    Component.onCompleted: {
+                        append({ text: catalog.i18nc("@item:inlistbox", "Ultimaker"), code: "cura" })
+                    }
+                }
+
+                currentIndex:
+                {
+                    var code = UM.Preferences.getValue("general/theme");
+                    for(var i = 0; i < themeList.count; ++i)
+                    {
+                        if(model.get(i).code == code)
+                        {
+                            return i
+                        }
+                    }
+                }
+                onActivated: UM.Preferences.setValue("general/theme", model.get(index).code)
+
+                Component.onCompleted:
+                {
+                    // Because ListModel is stupid and does not allow using qsTr() for values.
+                    for(var i = 0; i < themeList.count; ++i)
+                    {
+                        themeList.setProperty(i, "text", catalog.i18n(themeList.get(i).text));
+                    }
+
+                    // Glorious hack time. ComboBox does not update the text properly after changing the
+                    // model. So change the indices around to force it to update.
+                    currentIndex += 1;
+                    currentIndex -= 1;
+                }
+            }
+        }
+
+        Label
+        {
+            id: themeCaption
+
+            //: Theme change warning
+            text: catalog.i18nc("@label", "You will need to restart the application for theme changes to have effect.")
+            wrapMode: Text.WordWrap
+            font.italic: true
+        }
+
+        Item
+        {
+            //: Spacer
+            height: UM.Theme.getSize("default_margin").height
+            width: UM.Theme.getSize("default_margin").width
+        }
+
         Label
         {
             font.bold: true