Add SVGImage_Render sample

wxWidgets · Sep 5, 2019 · 83e2212 · 83e2212
1 parent 5a3f0dd
commit 83e2212
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diff --git a/demo/SVGImage.py → demo/SVGImage_Bitmap.py b/demo/SVGImage.py → demo/SVGImage_Bitmap.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 
 import os
 import glob
@@ -93,6 +92,9 @@ def runTest(frame, nb, log):
 Scalable Vector Graphics (SVG) files. The advantage of SVG files is that
 they can be used to create bitmaps of any size without loss of quality.
 
+This sample demonstrates rasterizing an SVG image to wx.Bitmaps of various
+sizes.
+
 </body></html>
 """
 

diff --git a/demo/SVGImage_Render.py b/demo/SVGImage_Render.py
@@ -0,0 +1,117 @@
+
+import os
+import glob
+import wx
+from wx.svg import SVGimage
+
+#----------------------------------------------------------------------
+
+class SVGRenderPanel(wx.Panel):
+    def __init__(self, parent):
+        wx.Panel.__init__(self, parent, style=wx.FULL_REPAINT_ON_RESIZE)
+
+        self._renderer = None
+        self._img = None
+
+        self.Bind(wx.EVT_PAINT, self.OnPaint)
+        self.SetBackgroundStyle(wx.BG_STYLE_PAINT)
+
+
+    def SetRenderer(self, renderer):
+        self._renderer = renderer
+        self.Refresh()
+
+
+    def SetSVGFile(self, svg_filename):
+        self._img = SVGimage.CreateFromFile(svg_filename)
+        self.Refresh()
+
+
+    def OnPaint(self, event):
+        dc = wx.PaintDC(self)
+        dc.Clear()
+
+        iw, ih = (self._img.width, self._img.height) if self._img else (100,100)
+        dcdim = min(self.Size.width, self.Size.height)
+        imgdim = min(iw, ih)
+        scale = dcdim / imgdim
+        width = int(iw * scale)
+        height = int(ih * scale)
+
+        dc.SetBrush(wx.Brush('white'))
+        dc.DrawRectangle(0,0, width, height)
+
+        if self._renderer and self._img:
+            ctx = self._renderer.CreateContext(dc)
+            self._img.RenderToGC(ctx, scale)
+
+
+
+#----------------------------------------------------------------------
+
+class TestPanel(wx.Panel):
+    def __init__(self, parent, log):
+        self.log = log
+        wx.Panel.__init__(self, parent, -1)
+
+        self.listbox = wx.ListBox(self, style=wx.LB_SINGLE, size=(250, -1))
+        self.listbox.AppendItems(glob.glob(os.path.join('data', '*.svg')))
+
+        self.renderPanel = SVGRenderPanel(self)
+        rightSizer = wx.BoxSizer(wx.VERTICAL)
+        rightSizer.Add(self.renderPanel, wx.SizerFlags(1).Expand())
+
+        self.Sizer = wx.BoxSizer(wx.HORIZONTAL)
+        self.Sizer.Add(self.listbox, wx.SizerFlags(1).Border(wx.ALL, 10).Expand())
+        self.Sizer.Add(rightSizer, wx.SizerFlags(2).Border(wx.RIGHT|wx.BOTTOM|wx.TOP, 10).Expand())
+
+        self.Bind(wx.EVT_LISTBOX, self.OnSelectItem)
+        self.listbox.SetSelection(0)
+
+        # TODO: Add ability for the user to select the renderer
+        if 'wxMSW' in wx.PlatformInfo:
+            renderer = wx.GraphicsRenderer.GetDirect2DRenderer()
+            # renderer = wx.GraphicsRenderer.GetCairoRenderer()
+        else:
+            renderer = wx.GraphicsRenderer.GetDefaultRenderer()
+        self.renderPanel.SetRenderer(renderer)
+
+        # Load the first SVG in the list into the static bitmaps
+        self.renderPanel.SetSVGFile(self.listbox.GetString(0))
+
+
+    def OnSelectItem(self, evt):
+        filename = self.listbox.GetStringSelection()
+        self.renderPanel.SetSVGFile(filename)
+
+
+#----------------------------------------------------------------------
+
+def runTest(frame, nb, log):
+    win = TestPanel(nb, log)
+    return win
+
+#----------------------------------------------------------------------
+
+
+
+overview = """<html><body>
+<h2><center>SVGImage</center></h2>
+
+The wx.svg.SVGimage class provides the ability to load, parse and render
+Scalable Vector Graphics (SVG) files. The advantage of SVG files is that
+they can be used to create bitmaps of any size without loss of quality.
+
+This sample demonstrates rendering an SVG image directly on to a
+wx.GraphicsContext using the GC's daring capabilities.
+
+</body></html>
+"""
+
+
+
+if __name__ == '__main__':
+    import sys,os
+    import run
+    run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
+
diff --git a/demo/demodata.py b/demo/demodata.py
@@ -24,10 +24,10 @@
 #
 # _treeList
 #
-# These are the Demo Catagory Headers
+# These are the Demo Category Headers
 # and Demo Module Names(Ex: Frame.py without ext)
 #
-# ('Demo Catagory Name String', [
+# ('Demo Category Name String', [
 #       'DemoModuleName1',
 #       'DemoModuleName2',
 #       'Etc',
@@ -44,7 +44,8 @@
         'TreeListCtrl',
         'NotificationMessage',
         'AddPrivateFont',
-        'SVGImage',
+        'SVGImage_Bitmap',
+        'SVGImage_Render',
     ]),
 
     # managed windows == things with a (optional) caption you can close
@@ -255,7 +256,8 @@
         'Img2PyArtProvider',
         'Mask',
         'RawBitmapAccess',
-        'SVGImage',
+        'SVGImage_Bitmap',
+        'SVGImage_Render',
         'Throbber',
     ]),
 
@@ -266,7 +268,6 @@
         'Cairo',
         'Cairo_Snippets',
         'ColourDB',
-        ##'DialogUnits',   # needs more explanations
         'DragScroller',
         'DrawXXXList',
         'FileHistory',
@@ -290,7 +291,8 @@
         'ShapedWindow',
         'Sound',
         'StandardPaths',
-        'SVGImage',
+        'SVGImage_Bitmap',
+        'SVGImage_Render',
         'SystemSettings',
         'ToolTip',
         'UIActionSimulator',