[Chris]
> Here's the trick. When I first wrote ScaledBitmap, I was imaginig using
> it for small bitmaps, like icons, etc. So it's not at all smart -- when
> you zoom, it sclaes the entire image, then draws it, even though on ly a
> prortion may be visible.
>
> I"ve written a ScaledBitmap2, which does "the right thing", and only
> scales the portion of the image you need. It may be buggy if you orient
> it any way other than 'tl', or do anythign with a projection function,
> but give it a try:
>
> SBM = FloatCanvas.ScaledBitmap2(MyBitmapOrImage, (x,y), ...)
> Canvas.AddObject(SBM)
>
> and see how that works for you.
Thank you! The ScaledBitmap2() method worked perfectly. And thanks for
your work on FloatCanvas!!
I'm including a minimalistic app below, for future generations <wink>
It's a starting point anyway...
Bill
<code>
import os
import wx
from wx.lib.floatcanvas import NavCanvas, FloatCanvas
class MyFrame(wx.Frame):
def __init__(self, *args, **kwargs):
wx.Frame.__init__(self, *args, **kwargs)
menuBar = wx.MenuBar()
menu1 = wx.Menu()
menu1.Append(101, "&Open", "Load an image")
menu1.AppendSeparator()
menu1.Append(102, "&Close", "Close the program")
menuBar.Append(menu1, "&File")
self.SetMenuBar(menuBar)
self.sb = self.CreateStatusBar()
nc = NavCanvas.NavCanvas(self, -1, Debug=0, BackgroundColor="GREY")
self.Canvas = nc.Canvas
# Set a min/max on scaling.
self.Canvas.MinScale = 100
self.Canvas.MaxScale = 5000
self.SetPosition((0, 0))
self.Show()
self.Bind(wx.EVT_MENU, self.LoadImage, id=101)
self.Bind(wx.EVT_MENU, self.CloseWindow, id=102)
def LoadImage(self, evt):
fileDlg = wx.FileDialog(self,
message = "Choose an image",
defaultDir = ".",
defaultFile = "",
# Add more file types here, but make sure
# to change the call to wx.Bitmap() below.
wildcard = "Supported files (*.tif) | *.tif",
style=wx.OPEN)
if fileDlg.ShowModal() == wx.ID_OK:
if hasattr(self, "bmp"):
# Clear the Canvas before we load something else??
self.Canvas.ClearAll()
path = fileDlg.GetPath()
head, tail = os.path.split(path)
self.sb.SetStatusText("Loading: %s, please wait" % tail)
# Change the call to wx.Bitmap() to use wx.BITMAP_TYPE_ANY
# if you want to deal with images other than just TIF.
self.bmp = wx.Bitmap(path, wx.BITMAP_TYPE_TIF)
sb = FloatCanvas.ScaledBitmap2(self.bmp, (0,0), 1, Position="tl")
self.Canvas.AddObject(sb)
self.Canvas.ZoomToBB()
self.sb.SetStatusText("Done loading: %s" % tail)
def CloseWindow(self, evt):
self.Destroy()
if __name__ == "__main__":
app = wx.App(False)
# A size of 1680 x 1020 fits my laptop nice ;) Change to suit.
frame = MyFrame(None, title="A Simple Image Viewer", size=(1680, 1020))
app.MainLoop()
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