I decided to recreate the classic BeOS screensaver BuyNow, and here it is.

I'm considered splashing it up a bit by adding parameters for colors, etc, but
this will make a good baseline.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20005 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/screen_savers/Jamfile

@@ -1,5 +1,6 @@
 SubDir HAIKU_TOP src add-ons screen_savers ;
 
+SubInclude HAIKU_TOP src add-ons screen_savers buynow ;
 SubInclude HAIKU_TOP src add-ons screen_savers haiku ;
 SubInclude HAIKU_TOP src add-ons screen_savers ifs ;
 SubInclude HAIKU_TOP src add-ons screen_savers slideshowsaver ;

src/add-ons/screen_savers/buynow/BuyNow.cpp

@@ -0,0 +1,105 @@
+/*
+ * Copyright 2007, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ryan Leavengood
+ */
+
+
+#include <ScreenSaver.h>
+#include <View.h>
+#include <StringView.h>
+#include <Font.h>
+
+
+const rgb_color kMediumBlue = {0, 0, 100};
+const rgb_color kWhite = {255, 255, 255};
+
+
+// Inspired by the classic BeOS screensaver, of course
+class BuyNow : public BScreenSaver
+{
+	public:
+					BuyNow(BMessage *archive, image_id);
+		void		Draw(BView *view, int32 frame);
+		void		StartConfig(BView *view);
+		status_t	StartSaver(BView *view, bool preview);
+		
+	private:
+		const char *fLine1;
+		const char *fLine2;
+		BPoint		fLine1Start;
+		BPoint		fLine2Start;
+};
+
+
+BScreenSaver *instantiate_screen_saver(BMessage *msg, image_id image) 
+{ 
+	return new BuyNow(msg, image);
+} 
+
+
+BuyNow::BuyNow(BMessage *archive, image_id id)
+ :	BScreenSaver(archive, id)
+ ,	fLine1("BUY")
+ ,	fLine2("NOW")
+{
+}
+
+
+void 
+BuyNow::StartConfig(BView *view) 
+{ 
+	view->AddChild(new BStringView(BRect(20, 10, 200, 35), "", "BUY NOW, by Ryan Leavengood"));
+} 
+
+
+status_t 
+BuyNow::StartSaver(BView *view, bool preview)
+{
+	float width = view->Bounds().Width();
+	float height = view->Bounds().Height();
+	
+	BFont font;
+	view->GetFont(&font);
+	font.SetSize(height / 2.5);
+	view->SetFont(&font);
+	
+	BRect rect;
+	escapement_delta delta;
+	delta.nonspace = 0;
+	delta.space = 0;
+	// If anyone has suggestions for how to clean this up, speak up
+	font.GetBoundingBoxesForStrings(&fLine1, 1, B_SCREEN_METRIC, &delta, &rect);
+	float y = ((height - (rect.Height() * 2 + height / 10)) / 2) + rect.Height();
+	fLine1Start.Set((width - rect.Width()) / 2, y);
+	font.GetBoundingBoxesForStrings(&fLine2, 1, B_SCREEN_METRIC, &delta, &rect);
+	fLine2Start.Set((width - rect.Width()) / 2, y + rect.Height() + height / 10);
+	
+	return B_OK;
+}
+
+
+void 
+BuyNow::Draw(BView *view, int32 frame)
+{
+	if (frame == 0) { 
+		// fill with blue on first frame
+		view->SetLowColor(kMediumBlue); 
+		view->FillRect(view->Bounds(), B_SOLID_LOW); 
+
+		// Set tick size to 500,000 microseconds = 0.5 second
+		SetTickSize(500000);
+	} else {
+		// Drawing the background color every other frame to make the text blink
+		if (frame % 2 == 1)
+			view->SetHighColor(kWhite);
+		else
+			view->SetHighColor(kMediumBlue);
+
+		view->DrawString(fLine1, fLine1Start);
+		view->DrawString(fLine2, fLine2Start);
+	}
+}
+

src/add-ons/screen_savers/buynow/Jamfile

@@ -0,0 +1,13 @@
+SubDir HAIKU_TOP src add-ons screen_savers buynow ;
+
+SetSubDirSupportedPlatformsBeOSCompatible ;
+
+ScreenSaver BuyNow :
+	BuyNow.cpp : 
+	be libscreensaver.so ;
+
+Package haiku-screensaverkit-cvs :
+	BuyNow :
+	boot home config add-ons Screen\ Savers
+;
+