I’m pulling a bitmap in from a database and I was putting it in a StaticBitmap using the SetBitmap() method. That worked fine, but I wanted to be able to capture a click on the image. I did some googling, doc reading and list archive perusing and it appears that I need to use something I can draw on (like a panel) to be able to capture the click event.
I replaced my StaticBitmap with the following object:
I’ve continued playing with this. I put a staticbitmap right above the panel and set it at the same time with the same bitmap. I also took a screenshot of the wrong output. code: http://pastebin.com/91Hzrf2z screenshot: http://f.imgtmp.com/JOVlo.png
I don’t understand why the staticbitmap displays the same bitmap correctly, but the dc.DrawBitmap turns it in to a tiny black square.
(for the archive, these links will only last about a day)
I’m pulling a bitmap in from a database and I was putting it in a StaticBitmap using the SetBitmap() method. That worked fine, but I wanted to be able to capture a click on the image. I did some googling, doc reading and list archive perusing and it appears that I need to use something I can draw on (like a panel) to be able to capture the click event.
I replaced my StaticBitmap with the following object:
I'm not sure why you are not seeing at least part of your image, and without a runnable sample (MakingSampleApps - wxPyWiki) it's hard to say for sure, but I do see these problems:
* If you've got this window in a sizer then you are not doing anything that will give the sizer hints on how this window should be sized. You can either change your base class to wx.PyPanel and then override DoGetBestSize, or you can call self.SetMinSize. See WindowSizeInfo - wxPyWiki
* Since you are only going to be painting a single bitmap there really isn't any need to do buffered drawing, since the whole purpose of buffering is to reduce the number of operations that draw to the screen to just one operation per paint event.
* Finally, you are "reinventing the wheel" See the wx.lib.statbmp module.
···
On 8/4/11 9:05 AM, David Ruggles wrote:
I've continued playing with this. I put a staticbitmap right above the
panel and set it at the same time with the same bitmap. I also took a
screenshot of the wrong output. code: http://pastebin.com/91Hzrf2z screenshot: http://f.imgtmp.com/JOVlo.png
I don't understand why the staticbitmap displays the same bitmap
correctly, but the dc.DrawBitmap turns it in to a tiny black square.
(for the archive, these links will only last about a day)
Thank you for your patient help. I was assuming I was “reinventing the wheel” but for the life of me I wasn’t able get the right google foo to let me find the “wheel”
I don’t understand why the staticbitmap displays the same bitmap
correctly, but the dc.DrawBitmap turns it in to a tiny black square.
(for the archive, these links will only last about a day)
I’m not sure why you are not seeing at least part of your image, and without a runnable sample (http://wiki.wxpython.org/MakingSampleApps) it’s hard to say for sure, but I do see these problems:
If you’ve got this window in a sizer then you are not doing anything that will give the sizer hints on how this window should be sized. You can either change your base class to wx.PyPanel and then override DoGetBestSize, or you can call self.SetMinSize. See http://wiki.wxpython.org/WindowSizeInfo
Since you are only going to be painting a single bitmap there really isn’t any need to do buffered drawing, since the whole purpose of buffering is to reduce the number of operations that draw to the screen to just one operation per paint event.
Finally, you are “reinventing the wheel” See the wx.lib.statbmp module.
Based on my research it looks like wx.lib.statbmp should be (or is designed to be) a drop-in replacement for StaticBitmap.
Because of the way I was using StaticBitmap I found two discrepancies, which I fixed, but I’m not sure I fixed them correctly.
If you set a size for a StaticBitmap, using SetBitmap doesn’t change the size
If you call SetBitmap(wx.NullBitmap) on a StaticBitmap it clears the bitmap
Here’s the class and I’ve noted my changes:
class GenStaticBitmap(wx.PyControl):
labelDelta = 1
def __init__(self, parent, ID, bitmap,
pos = wx.DefaultPosition, size = wx.DefaultSize,
style = 0,
name = "genstatbmp"):
self._fixedsize = (size != wx.DefaultSize) <<<<<<< If a size is specified, make it a fixed size
if not style & wx.BORDER_MASK:
style = style | wx.BORDER_NONE
wx.PyControl.__init__(self, parent, ID, pos, size, style,
wx.DefaultValidator, name)
self._bitmap = bitmap
self.InheritAttributes()
self.SetInitialSize(size)
self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
self.Bind(wx.EVT_PAINT, self.OnPaint)
def SetBitmap(self, bitmap):
self._bitmap = bitmap
if not self._fixedsize: <<<<<<< Only change the size if it wasn't specified on init
self.SetInitialSize( (bitmap.GetWidth(), bitmap.GetHeight()) ) <<<<<<<
self.Refresh()
def GetBitmap(self):
return self._bitmap
def DoGetBestSize(self):
"""
Overridden base class virtual. Determines the best size of the
control based on the bitmap size.
"""
return wx.Size(self._bitmap.GetWidth(), self._bitmap.GetHeight())
def AcceptsFocus(self):
"""Overridden base class virtual."""
return False
def GetDefaultAttributes(self):
"""
Overridden base class virtual. By default we should use
the same font/colour attributes as the native StaticBitmap.
"""
return wx.StaticBitmap.GetClassDefaultAttributes()
def ShouldInheritColours(self):
"""
Overridden base class virtual. If the parent has non-default
colours then we want this control to inherit them.
"""
return True
def OnPaint(self, event):
dc = wx.PaintDC(self)
if self._bitmap:
dc.DrawBitmap(self._bitmap, 0, 0, True)
else: <<<<<<<
dc.Clear() <<<<<<< This will clear the image if wx.NullBitmap is passed in
def OnEraseBackground(self, event):
pass
Thank you for your patient help. I was assuming I was “reinventing the wheel” but for the life of me I wasn’t able get the right google foo to let me find the “wheel”
I don’t understand why the staticbitmap displays the same bitmap
correctly, but the dc.DrawBitmap turns it in to a tiny black square.
(for the archive, these links will only last about a day)
I’m not sure why you are not seeing at least part of your image, and without a runnable sample (http://wiki.wxpython.org/MakingSampleApps) it’s hard to say for sure, but I do see these problems:
If you’ve got this window in a sizer then you are not doing anything that will give the sizer hints on how this window should be sized. You can either change your base class to wx.PyPanel and then override DoGetBestSize, or you can call self.SetMinSize. See http://wiki.wxpython.org/WindowSizeInfo
Since you are only going to be painting a single bitmap there really isn’t any need to do buffered drawing, since the whole purpose of buffering is to reduce the number of operations that draw to the screen to just one operation per paint event.
Finally, you are “reinventing the wheel” See the wx.lib.statbmp module.
