ScreenSaver: rework some of the fixes

* Use a BTextView for the "no preview" text again, as Skipp_OSX pointed
this allows it to word wrap as needed with any font bigger than 10pt.
* Show a black screen rather than the "no preview" text for Darkness and
when a screensaver fails to load. This matches what screen_blanker will
do.

src/preferences/screensaver/PreviewView.cpp

@@ -64,11 +64,18 @@ PreviewView::PreviewView(const char* name)
 
 	BGroupLayout* layout = new BGroupLayout(B_VERTICAL);
 	// We draw the "monitor" around the preview, hence the strange insets.
-	layout->SetInsets(10, 8, 11, 16);
+	layout->SetInsets(7, 6, 8, 12);
 	SetLayout(layout);
 
-	fNoPreview = new BStringView("no preview",
+	// A BStringView would be enough, if only it handled word wrapping.
-		B_TRANSLATE("No preview available"));
+	fNoPreview = new BTextView("no preview");
+	fNoPreview->SetText(B_TRANSLATE("No preview available"));
+	fNoPreview->SetFontAndColor(be_plain_font, B_FONT_ALL, &kWhite);
+	fNoPreview->MakeEditable(false);
+	fNoPreview->MakeResizable(false);
+	fNoPreview->MakeSelectable(false);
+	fNoPreview->SetViewColor(0, 0, 0);
+	fNoPreview->SetLowColor(0, 0, 0);
 
 	fNoPreview->Hide();
 
@@ -138,6 +145,7 @@ PreviewView::AddPreview()
 
 	fNoPreview->SetExplicitSize(BSize(previewWidth, previewHeight));
 	fNoPreview->ResizeTo(previewWidth, previewHeight);
+	fNoPreview->SetInsets(0, previewHeight / 3, 0 , 0);
 
 	return fSaverView;
 }
@@ -146,6 +154,8 @@ PreviewView::AddPreview()
 BView*
 PreviewView::RemovePreview()
 {
+	ShowNoPreview();
+
 	if (fSaverView != NULL)
 		ChildAt(0)->RemoveChild(fSaverView);
 

src/preferences/screensaver/PreviewView.h

@@ -13,7 +13,7 @@
 #include <View.h>
 
 
-class BStringView;
+class BTextView;
 
 class PreviewView : public BView {
 public:
@@ -31,7 +31,7 @@ public:
 
 private:
 			BView*				fSaverView;
-			BStringView*		fNoPreview;
+			BTextView*			fNoPreview;
 };
 
 

src/preferences/screensaver/ScreenSaverWindow.cpp

@@ -833,8 +833,12 @@ ModulesView::_OpenSaver()
 			fSaverRunner->Run();
 		} else
 			fPreviewView->ShowNoPreview();
-	} else
+	} else {
-		fPreviewView->ShowNoPreview();
+		// Failed to load OR this is the "Darkness" screensaver. Show a black
+		// preview (this is what will happen in both cases when screen_blanker
+		// runs).
+		fPreviewView->HideNoPreview();
+	}
 
 	if (fSettingsView->ChildAt(0) == NULL) {
 		// There are no settings at all, we add the module name here to