Added a method to calc text size rendered with a given font

Thiago Franco de Moraes
1 parent fa77b6dc
Showing 1 changed file with 24 additions and 0 deletions Show diff stats
invesalius/data/viewer_slice.py
@@ -258,6 +258,30 @@ class CanvasRendererCTX:
         self._cv_image.Modified()
         self.modified = False
  
+    def calc_text_size(self, text, font=None):
+        """
+        Given an unicode text and a font returns the width and height of the
+        rendered text in pixels.
+
+        Params:
+            text: An unicode text.
+            font: An wxFont.
+
+        Returns:
+            A tuple with width and height values in pixels
+        """
+        if self.gc is None:
+            return None
+        gc = self.gc
+
+        if font is None:
+            font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
+
+        _font = gc.CreateFont(font)
+        gc.SetFont(_font)
+        w, h = gc.GetTextExtent(text)
+        return w, h
+
     def draw_line(self, pos0, pos1, arrow_start=False, arrow_end=False, colour=(255, 0, 0, 128), width=2, style=wx.SOLID):
         """
         Draw a line from pos0 to pos1
...	...	@@ -258,6 +258,30 @@ class CanvasRendererCTX:
258	258	self._cv_image.Modified()
259	259	self.modified = False
260	260
	261	+ def calc_text_size(self, text, font=None):
	262	+ """
	263	+ Given an unicode text and a font returns the width and height of the
	264	+ rendered text in pixels.
	265	+
	266	+ Params:
	267	+ text: An unicode text.
	268	+ font: An wxFont.
	269	+
	270	+ Returns:
	271	+ A tuple with width and height values in pixels
	272	+ """
	273	+ if self.gc is None:
	274	+ return None
	275	+ gc = self.gc
	276	+
	277	+ if font is None:
	278	+ font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
	279	+
	280	+ _font = gc.CreateFont(font)
	281	+ gc.SetFont(_font)
	282	+ w, h = gc.GetTextExtent(text)
	283	+ return w, h
	284	+
261	285	def draw_line(self, pos0, pos1, arrow_start=False, arrow_end=False, colour=(255, 0, 0, 128), width=2, style=wx.SOLID):
262	286	"""
263	287	Draw a line from pos0 to pos1
...	...