Changeset 223

Timestamp:

12/25/06 16:51:01 (5 years ago)

Author:

mg

Message:

Make the menu scroll if it doesn't fit on screen.

Files:

• trunk/src/pyspacewar/ui.py (modified) (4 diffs)

trunk/src/pyspacewar/ui.py

@@ -792 +792 @@
         height = max(0, (item_height + yspacing) * len(items) - yspacing)
         HUDElement.__init__(self, width, height, xalign, yalign)
+        self.full_height = height
         self.font = font
         self.items = items
@@ -798 +799 @@
         self.ypadding = ypadding
         self.selected_item = 0
+        self.top = 0
         self.item_height = item_height
-        self.surface = pygame.Surface((self.width, self.height))
+        self.surface = pygame.Surface((self.width, self.full_height))
         self.surface.set_alpha(255 * 0.9)
         self.surface.set_colorkey((1, 1, 1))
         self.invalidate()
+
+    def position(self, surface, margin=10):
+        """Calculate screen position for the widget."""
+        max_height = surface.get_height() - 2 * margin
+        item_spacing = self.item_height + self.yspacing
+        self.height = self.full_height
+        while self.height > max_height:
+            self.height -= item_spacing
+        if self.selected_item * item_spacing < self.top:
+            self.top = self.selected_item * item_spacing
+        while (self.selected_item * item_spacing + self.item_height >
+               self.top + self.height):
+            self.top += item_spacing
+        return HUDElement.position(self, surface, margin)
 
     def invalidate(self):
@@ -821 +837 @@
         """Find the item at given coordinates."""
         ix, iy = self.position(surface)
+        iy -= self.top
         for idx, item in enumerate(self.items):
             if (ix <= x < ix + self.width and
@@ -856 +873 @@
             self._draw()
         x, y = self.position(surface)
-        surface.blit(self.surface, (x, y))
+        surface.blit(self.surface, (x, y),
+                     (0, self.top, self.width, self.height))