Joseph,
I"m cc-ing this to the floatcanvas mailing list;
http://mailman.paulmcnett.com/cgi-bin/mailman/listinfo/floatcanvas
Other people may be interested, and it's nice to have an archive of
questions and answers.
On Mon, Jan 27, 2014 at 3:48 PM, Joseph Basquin <[email protected]>wrote:
> I would like to do the following thing with FloatCanvas : place a 800x600
> .png file as full image of a wx.Panel, and auto zoom on it if the Frame is
> resized.
>
> How to do this with FloatCanvas ?
>
You need to put the image on the Canvas with a ScaledBitmap2 object (it's
more efficient than Scaledbitmap when zooming in on it...) . Then bind
EVT_SIZE to a a method that calls ZoomToBB on the Canvas. See enclosed
example -- you'll need to set the ImageFile to your image for it to work.
-Chris
--
Christopher Barker, Ph.D.
Oceanographer
Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception
[email protected]
#!/usr/bin/env python
"""
This demo shows how to use a ScaledBitmap2 (which is like a scaled bitmap,
but uses memory more efficiently for large images and high zoom levels.)
"""
## Set a path to an Image file here:
ImageFile = "white_tank.jpg"
import wx
import random
## import the installed version
from wx.lib.floatcanvas import NavCanvas, FloatCanvas
## import a local version
#import sys
#sys.path.append("../")
#from floatcanvas import NavCanvas, FloatCanvas
class DrawFrame(wx.Frame):
"""
A frame used for the FloatCanvas Demo
"""
def __init__(self, *args, **kwargs):
wx.Frame.__init__(self, *args, **kwargs)
self.CreateStatusBar()
# Add the Canvas
Canvas = NavCanvas.NavCanvas(self,
ProjectionFun = None,
BackgroundColor = "DARK SLATE BLUE",
).Canvas
Canvas.MaxScale=20 # sets the maximum zoom level
self.Canvas = Canvas
FloatCanvas.EVT_MOTION(self.Canvas, self.OnMove )
# create the image:
image = wx.Image(ImageFile)
self.width, self.height = image.GetSize()
img = FloatCanvas.ScaledBitmap2( image,
(0,0),
Height=image.GetHeight(),
Position = 'tl',
)
Canvas.AddObject(img)
self.Canvas.Bind(wx.EVT_SIZE, self.OnSize)
self.Show()
Canvas.ZoomToBB()
def OnSize(self, event):
"""
re-zooms the canvas to fit the window
"""
self.Canvas.ZoomToBB()
event.Skip()
def OnMove(self, event):
"""
Updates the status bar with the world coordinates
"""
self.SetStatusText("%i, %i"%tuple(event.Coords))
app = wx.App(False)
F = DrawFrame(None, title="FloatCanvas Demo App", size=(700,700) )
app.MainLoop()
_______________________________________________
FloatCanvas mailing list
[email protected]
http://mailman.paulmcnett.com/cgi-bin/mailman/listinfo/floatcanvas
