Appearance preflet: Add a double scrollbar arrows setting.

Rename the 'Decorators' tab to 'Look and feel'.

Fixes #8926.

src/preferences/appearance/APRWindow.cpp

@@ -55,7 +55,7 @@ APRWindow::APRWindow(BRect frame)
 	fColorsView = new APRView(B_TRANSLATE("Colors"));
 
 	fDecorSettings = new DecorSettingsView(
-		B_TRANSLATE("Decorators"));
+		B_TRANSLATE("Look and feel"));
 
 	fAntialiasingSettings = new AntialiasingSettingsView(
 		B_TRANSLATE("Antialiasing"));

src/preferences/appearance/DecorSettingsView.cpp

@@ -17,8 +17,10 @@
 #include <Box.h>
 #include <Button.h>
 #include <Catalog.h>
+#include <CheckBox.h>
 #include <GridLayoutBuilder.h>
 #include <GroupLayoutBuilder.h>
+#include <InterfaceDefs.h>
 #include <Locale.h>
 #include <MenuField.h>
 #include <MenuItem.h>
@@ -36,6 +38,9 @@
 
 static const int32 kMsgSetDecor = 'deco';
 static const int32 kMsgDecorInfo = 'idec';
+static const int32 kMsgDoubleScrollbarArrows = 'dsba';
+
+static const bool kDefaultDoubleScrollbarArrowsSetting = false;
 
 
 //	#pragma mark -
@@ -43,7 +48,11 @@ static const int32 kMsgDecorInfo = 'idec';
 
 DecorSettingsView::DecorSettingsView(const char* name)
 	:
-	BView(name, 0)
+	BView(name, 0),
+	fDecorInfoButton(NULL),
+	fDecorMenuField(NULL),
+	fDecorMenu(NULL),
+	fDoubleScrollbarArrowsCheckBox(NULL)
 {
 	// Decorator menu
 	_BuildDecorMenu();
@@ -53,6 +62,13 @@ DecorSettingsView::DecorSettingsView(const char* name)
 	fDecorInfoButton = new BButton(B_TRANSLATE("About"),
 		new BMessage(kMsgDecorInfo));
 
+	fDoubleScrollbarArrowsCheckBox = new BCheckBox("doubleScrollbarArrows",
+		B_TRANSLATE("Use double scrollbar arrows"),
+		new BMessage(kMsgDoubleScrollbarArrows));
+
+	fSavedDoubleArrowsValue = _GetDoubleScrollbarArrowsSetting();
+	fDoubleScrollbarArrowsCheckBox->SetValue(fSavedDoubleArrowsValue);
+
 	SetLayout(new BGroupLayout(B_VERTICAL));
 
 	// control layout
@@ -61,9 +77,10 @@ DecorSettingsView::DecorSettingsView(const char* name)
         .Add(fDecorMenuField->CreateMenuBarLayoutItem(), 1, 0)
 		.Add(fDecorInfoButton, 2, 0)
 
-        .Add(BSpaceLayoutItem::CreateGlue(), 0, 3, 2)
+		.Add(fDoubleScrollbarArrowsCheckBox, 0, 3, 2)
-        .SetInsets(10, 10, 10, 10)
+		.Add(BSpaceLayoutItem::CreateGlue(), 0, 4, 2)
-    );
+		.SetInsets(10, 10, 10, 10)
+	);
 	// TODO : Decorator Preview Image?
 }
 
@@ -83,6 +100,7 @@ DecorSettingsView::AttachedToWindow()
 
 	fDecorMenu->SetTargetForItems(this);
 	fDecorInfoButton->SetTarget(this);
+	fDoubleScrollbarArrowsCheckBox->SetTarget(this);
 }
 
 
@@ -125,6 +143,9 @@ DecorSettingsView::MessageReceived(BMessage *msg)
 
 			break;
 		}
+		case kMsgDoubleScrollbarArrows:
+			_SetDoubleScrollbarArrowsSetting(fDoubleScrollbarArrowsCheckBox->Value());
+			break;
 
 		default:
 			BView::MessageReceived(msg);
@@ -197,24 +218,53 @@ DecorSettingsView::_AdoptInterfaceToCurrentDecor()
 }
 
 
+bool
+DecorSettingsView::_GetDoubleScrollbarArrowsSetting()
+{
+	scroll_bar_info info;
+	get_scroll_bar_info(&info);
+
+	return info.double_arrows;
+}
+
+
+void
+DecorSettingsView::_SetDoubleScrollbarArrowsSetting(bool value)
+{
+	scroll_bar_info info;
+	get_scroll_bar_info(&info);
+
+	info.double_arrows = value;
+	set_scroll_bar_info(&info);
+
+	Window()->PostMessage(kMsgUpdate);
+}
+
+
 void
 DecorSettingsView::SetDefaults()
 {
 	_SetDecor(fDecorUtility.DefaultDecorator());
+	_SetDoubleScrollbarArrowsSetting(kDefaultDoubleScrollbarArrowsSetting);
+	fDoubleScrollbarArrowsCheckBox->SetValue(
+		kDefaultDoubleScrollbarArrowsSetting);
 }
 
 
 bool
 DecorSettingsView::IsDefaultable()
 {
-	return fCurrentDecor != fDecorUtility.DefaultDecorator()->Name();
+	return fCurrentDecor != fDecorUtility.DefaultDecorator()->Name() ||
+		fDoubleScrollbarArrowsCheckBox->Value() !=
+			kDefaultDoubleScrollbarArrowsSetting;
 }
 
 
 bool
 DecorSettingsView::IsRevertable()
 {
-	return fCurrentDecor != fSavedDecor;
+	return fCurrentDecor != fSavedDecor ||
+		fDoubleScrollbarArrowsCheckBox->Value() != fSavedDoubleArrowsValue;
 }
 
 
@@ -222,4 +272,6 @@ void
 DecorSettingsView::Revert()
 {
 	_SetDecor(fSavedDecor);
+	_SetDoubleScrollbarArrowsSetting(fSavedDoubleArrowsValue);
+	fDoubleScrollbarArrowsCheckBox->SetValue(fSavedDoubleArrowsValue);
 }

src/preferences/appearance/DecorSettingsView.h

@@ -16,6 +16,7 @@
 
 
 class BButton;
+class BCheckBox;
 class BMenuField;
 class BPopUpMenu;
 
@@ -40,6 +41,8 @@ private:
 			void				_BuildDecorMenu();
 			void				_AdoptToCurrentDecor();
 			void				_AdoptInterfaceToCurrentDecor();
+			bool				_GetDoubleScrollbarArrowsSetting();
+			void				_SetDoubleScrollbarArrowsSetting(bool value);
 
 private:
 			DecorInfoUtility	fDecorUtility;
@@ -47,9 +50,11 @@ private:
 			BButton*			fDecorInfoButton;
 			BMenuField*			fDecorMenuField;
 			BPopUpMenu*			fDecorMenu;
+			BCheckBox*			fDoubleScrollbarArrowsCheckBox;
 
 			BString				fSavedDecor;
 			BString				fCurrentDecor;
+			bool				fSavedDoubleArrowsValue;
 };
 
 #endif // DECOR_SETTINGS_VIEW_H