Merge pull request #228 from garyhodgson/experimental

Projectlayer processing a zip of bmp files

bmpDisplay.py

+# create a simple image slide show using the
+# wx.PaintDC surface as a canvas and
+# DrawBitmap(bitmap, x, y, bool transparent)
+# Source:  vegaseat
+
+import wx
+import os
+import zipfile
+import tempfile
+import shutil
+
+class MyFrame(wx.Frame):
+    def __init__(self, parent, mysize):
+        wx.Frame.__init__(self, parent, wx.ID_ANY, size=mysize)
+        self.SetBackgroundColour('black')
+        
+        # milliseconds per frame
+        self.delay = 60
+        # number of loops
+        self.loops = 1
+
+        zipfilename = 'images/out.3dlp.zip'
+        if not zipfile.is_zipfile(zipfilename):
+            raise Exception(zipfilename + " is not a zip file!")
+        zip = zipfile.ZipFile(zipfilename, 'r')
+        self.mytmpdir = tempfile.mkdtemp()
+        zip.extractall(self.mytmpdir)
+
+        image_type = ".bmp"
+        image_dir = self.mytmpdir
+        file_list = []
+        self.name_list = []
+        for file in os.listdir(image_dir):
+            path = os.path.join(image_dir, file)
+            if os.path.isfile(path) and path.endswith(image_type):
+                # just the file name
+                self.name_list.append(file)
+                # full path name
+                file_list.append(path)
+        # create a list of image objects
+        self.image_list = []
+        for image_file in file_list:
+            self.image_list.append(wx.Bitmap(image_file))
+        
+        # bind the panel to the paint event
+        wx.EVT_PAINT(self, self.onPaint)
+
+    def __del__(self):
+        if self.mytmpdir:
+            shutil.rmtree(self.mytmpdir)
+
+    def onPaint(self, event=None):
+        # this is the wxPython drawing surface/canvas
+        dc = wx.PaintDC(self)
+        while self.loops:
+            self.loops -= 1
+            for ix, bmp in enumerate(self.image_list):
+                # optionally show some image information
+                w, h = bmp.GetSize()
+                info = "%s  %dx%d" % (self.name_list[ix], w, h)
+                self.SetTitle(info)
+                #self.SetSize((w,h))
+                # draw the image
+                dc.DrawBitmap(bmp, 0, 0, True)
+                wx.MilliSleep(self.delay)
+                # don't clear on fast slide shows to avoid flicker
+                if self.delay > 200:
+                    dc.Clear()
+
+
+app = wx.App()
+width = 800
+frameoffset = 35
+height = 600 + frameoffset
+MyFrame(None, (width, height)).Show()
+app.MainLoop()
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