Changed selection box to use a checkered pattern, closer to what Be's ShowImage uses. Stopped using inversion to clear old selections, drawing the bitmap over them instead. Fixed the rect used in setting the view bitmap.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5090 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/showimage/ShowImageView.cpp

@@ -38,13 +38,22 @@
 #include <TranslatorRoster.h>
 #include <BitmapStream.h>
 #include <Rect.h>
+#include <SupportDefs.h>
 
 #include "ShowImageConstants.h"
 #include "ShowImageView.h"
 
+#ifndef min
+#define min(a,b) ((a)>(b)?(b):(a))
+#endif
+#ifndef max
+#define max(a,b) ((a)>(b)?(a):(b))
+#endif
+
 #define BORDER_WIDTH 16
 #define BORDER_HEIGHT 16
 #define PEN_SIZE 1.0f
+const rgb_color kborderColor = { 0, 0, 0, 255 };
 
 ShowImageView::ShowImageView(BRect rect, const char *name, uint32 resizingMode,
 	uint32 flags)
@@ -56,7 +65,7 @@ ShowImageView::ShowImageView(BRect rect, const char *name, uint32 resizingMode,
 	fbhasSelection = false;
 	
 	SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
-	SetHighColor(0, 0, 0);
+	SetHighColor(kborderColor);
 	SetPenSize(PEN_SIZE);
 }
 
@@ -119,9 +128,9 @@ ShowImageView::SetImage(const entry_ref *pref)
 	msgr.SendMessage(&msg);
 	
 	SetViewBitmap(fpbitmap, fpbitmap->Bounds(),
-		BRect(BORDER_WIDTH - PEN_SIZE, BORDER_HEIGHT - PEN_SIZE,
-			fpbitmap->Bounds().Width() + BORDER_WIDTH + PEN_SIZE,
-			fpbitmap->Bounds().Height() + BORDER_HEIGHT + PEN_SIZE),
+		BRect(BORDER_WIDTH, BORDER_HEIGHT,
+			fpbitmap->Bounds().Width() + BORDER_WIDTH,
+			fpbitmap->Bounds().Height() + BORDER_HEIGHT),
 		B_FOLLOW_TOP | B_FOLLOW_LEFT, 0
 	);
 
@@ -153,17 +162,31 @@ ShowImageView::Draw(BRect updateRect)
 				fpbitmap->Bounds().Height() + BORDER_HEIGHT + PEN_SIZE));
 				
 		if (fbhasSelection)
-			DrawInvertBox(fselectionRect);
+			DrawSelectionBox(fselectionRect);
 	}
 }
 
 void
-ShowImageView::DrawInvertBox(BRect &rect)
+ShowImageView::DrawSelectionBox(BRect &rect)
 {
-	drawing_mode oldmode = DrawingMode();
-	SetDrawingMode(B_OP_INVERT);
-	StrokeRect(rect);
-	SetDrawingMode(oldmode);
+	// TODO: Make my own pattern to mimic the
+	// marching ants in Be's ShowImage?
+	
+	StrokeRect(rect, B_MIXED_COLORS);
+	Sync();
+}
+
+void
+ShowImageView::ClearSelectionBox(BRect &rect)
+{
+	BRect bitmapRect = rect;
+	if (!bitmapRect.IsValid())
+		printf("Invalid Rect\n");
+		
+	bitmapRect.OffsetBy(-(BORDER_WIDTH), -(BORDER_HEIGHT));	
+	DrawBitmapAsync(fpbitmap, bitmapRect, rect);
+		// don't draw the bitmap immediately, more drawing
+		// almost always comes after this function is used
 }
 
 void
@@ -191,7 +214,7 @@ ShowImageView::MouseDown(BPoint point)
 	// inside an existing selection and starts a drag operation
 	
 	if (fbhasSelection)
-		DrawInvertBox(fselectionRect);
+		ClearSelectionBox(fselectionRect);
 	
 	fbhasSelection = false;
 	
@@ -205,7 +228,6 @@ ShowImageView::MouseDown(BPoint point)
 	firstPoint = point;
 	ConstrainToImage(firstPoint);
 	secondPoint = firstPoint;
-		// just to be safe
 	
 	BRect curSel, lastSel;
 
@@ -218,13 +240,19 @@ ShowImageView::MouseDown(BPoint point)
 	// has been made.
 	while (buttons) {
 		ConstrainToImage(secondPoint);
-		curSel = BRect(firstPoint, secondPoint);
+		
+		// make a BRect that passes IsValid()
+		curSel.left = min(firstPoint.x, secondPoint.x);
+		curSel.top = min(firstPoint.y, secondPoint.y);
+		curSel.right = max(firstPoint.x, secondPoint.x);
+		curSel.bottom = max(firstPoint.y, secondPoint.y);
+
 		if (!bfirst && curSel != lastSel)
-			DrawInvertBox(lastSel);
+			ClearSelectionBox(lastSel);
 		if (curSel != lastSel)
-			DrawInvertBox(curSel);
+			DrawSelectionBox(curSel);
 				
-		snooze(20 * 1000);
+		snooze(25 * 1000);
 		lastSel = curSel;
 		GetMouse(&secondPoint, &buttons);
 		bfirst = false;