From e0622ab588583d1148af54c0e856ae63339a3491 Mon Sep 17 00:00:00 2001
From: Ben Basha <benbasha@rockbox.org>
Date: Fri, 10 Feb 2006 13:57:11 +0000
Subject: add a bitmap progress bar option + add %P|filename.bmp| tag to the
 WPS

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8648 a1c6a512-1295-4272-9138-f99709370657
---
 apps/gui/scrollbar.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)

(limited to 'apps/gui/scrollbar.c')

diff --git a/apps/gui/scrollbar.c b/apps/gui/scrollbar.c
index 73c523f56a..4cf92f4b47 100644
--- a/apps/gui/scrollbar.c
+++ b/apps/gui/scrollbar.c
@@ -21,6 +21,7 @@
 #ifdef HAVE_LCD_BITMAP
 #include "config.h"
 #include "limits.h"
+#include "bmp.h"
 
 void gui_scrollbar_draw(struct screen * screen, int x, int y,
                         int width, int height, int items,
@@ -101,4 +102,94 @@ void gui_scrollbar_draw(struct screen * screen, int x, int y,
     else
         screen->fillrect(x + start + 1, y + 1, size, height - 2);
 }
+
+void gui_bitmap_scrollbar_draw(struct screen * screen, struct bitmap bm, int x, int y,
+                        int width, int height, int items,
+                        int min_shown, int max_shown,
+                        enum orientation orientation)
+{
+    int min;
+    int max;
+    int inner_len;
+    int start;
+    int size;
+
+    screen->set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
+
+    /* clear pixels in progress bar */
+    screen->fillrect(x, y, width, height);
+
+    /* min should be min */
+    if(min_shown < max_shown) {
+        min = min_shown;
+        max = max_shown;
+    }
+    else {
+        min = max_shown;
+        max = min_shown;
+    }
+
+    /* limit min and max */
+    if(min < 0)
+        min = 0;
+    if(min > items)
+        min = items;
+
+    if(max < 0)
+        max = 0;
+    if(max > items)
+        max = items;
+
+    if (orientation == VERTICAL)
+        inner_len = height;
+    else
+        inner_len = width;
+
+    /* avoid overflows */
+    while (items > (INT_MAX / inner_len)) {
+        items >>= 1;
+        min >>= 1;
+        max >>= 1;
+    }
+
+    /* calc start and end of the knob */
+    if (items > 0 && items > (max - min)) {
+        size = inner_len * (max - min) / items;
+        if (size == 0) { /* width of knob is null */
+            size = 1;
+            start = (inner_len - 1) * min / items;
+        } else {
+            start = (inner_len - size) * min / (items - (max - min));
+        }
+    } else {  /* if null draw full bar */
+        size = inner_len;
+        start = 0;
+    }
+
+    screen->set_drawmode(DRMODE_SOLID);
+
+    if(orientation == VERTICAL) {
+#if LCD_DEPTH > 1
+      if (bm.format == FORMAT_MONO)
+#endif
+        screen->mono_bitmap_part(bm.data, 0, 0, 
+                                 bm.width, x, y + start, width, size);
+#if LCD_DEPTH > 1
+      else 
+        screen->transparent_bitmap_part((fb_data *)bm.data, 0, 0, 
+                                        bm.width, x, y + start, width, size);
+#endif 
+    } else {
+#if LCD_DEPTH > 1
+      if (bm.format == FORMAT_MONO)
+#endif
+        screen->mono_bitmap_part(bm.data, 0, 0, 
+                                 bm.width, x + start, y, size, height);
+#if LCD_DEPTH > 1
+      else
+        screen->transparent_bitmap_part((fb_data *)bm.data, 0, 0, 
+                                        bm.width, x + start, y, size, height);
+#endif
+    }
+}
 #endif /* HAVE_LCD_BITMAP */
-- 
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