added tooltips with information about light tools

[tabakrolletjie.git] / tabakrolletjie / widgets.py

diff --git a/tabakrolletjie/widgets.py b/tabakrolletjie/widgets.py
index 4341c703d717be28ae59a4d1a6a16b056ac01061..166cfc0dc84ae88dcd330fc6cdb8cf83f462b112 100644 (file)
--- a/tabakrolletjie/widgets.py
+++ b/tabakrolletjie/widgets.py
@@ -3,12 +3,40 @@
 # There is no implied container / window system (yet)
 
 import pygame.locals as pgl
+import pygame.mouse
+import pygame.surface
 
 from .loader import loader
-from .constants import FONTS
+from .constants import FONTS, COLOURS
 from .transforms import NullTransform, Multiply
 
 
+class Tooltip(object):
+    def __init__(self, textparts, font='sans', size=12, padding=5, distance=10):
+        self._font = loader.load_font(FONTS[font], size=size)
+        self._text = [self._font.render(text, True, COLOURS["white"]) for text in textparts]
+        self._padding = padding
+        self._distance =  distance
+
+    def render(self, surface, tool_pos, tool_width):
+        width = max(t.get_size()[0] for t in self._text) + 2 * self._padding
+        height = sum(t.get_size()[1] for t in self._text) + 2 * self._padding
+
+        tooltip = pygame.surface.Surface(
+            (width, height), pgl.SWSURFACE).convert_alpha()
+        tooltip.fill((0, 0, 0, 172))
+
+        ty = 0
+        for t in self._text:
+            tooltip.blit(t, (self._padding, self._padding + ty), None)
+            ty += self._font.get_height()
+
+        x = tool_pos[0] - width/2 + tool_width/2
+        y = tool_pos[1] - height - self._distance
+
+        surface.blit(tooltip, (x, y), None)
+        
+
 class Button(object):
 
     def __init__(self, size, name=None, pos=None, padding=10):
@@ -17,6 +45,7 @@ class Button(object):
         self.position = pos
         self.name = name
         self.enabled = True
+        self.tooltip = None
 
     def enable(self):
         self.enabled = True
@@ -58,6 +87,20 @@ class Button(object):
                     return True
         return False
 
+    def mouseover(self):
+        if not self.enabled:
+            return False
+        if self._pos is None:
+            # Unplaced buttons can't be moused over
+            return False
+
+        mpos = pygame.mouse.get_pos()
+        
+        if self._min_x < mpos[0] < self._max_x:
+            if self._min_y < mpos[1] < self._max_y:
+                return True
+        return False
+
 
 class SpacerButton(Button):
     """ Add a nothing object which can be used to space other things,
@@ -85,6 +128,8 @@ class TextButton(Button):
     def render(self, surface):
         if self.enabled:
             surface.blit(self._text, self._pos, None)
+            if self.mouseover() and self.tooltip:
+                self.tooltip.render(surface, self._pos, self.get_width())
         else:
             surface.blit(self._disabled_text, self._pos, None)
 
@@ -112,5 +157,7 @@ class ImageButton(Button):
     def render(self, surface):
         if self.enabled:
             surface.blit(self._img, self._pos, None)
+            if self.mouseover() and self.tooltip:
+                self.tooltip.render(surface, self._pos, self.get_width())
         else:
             surface.blit(self._disabled_img, self._pos, None)