buttons.py

Wxpython Implemented on Windows CE, Source code

                    
        self.DrawBezel(dc, x1, y1, x2, y2)
        self.DrawLabel(dc, width, height)
        if self.hasFocus and self.useFocusInd:
            self.DrawFocusIndicator(dc, width, height)


    def OnLeftDown(self, event):
        if not self.IsEnabled():
            return
        self.up = False
        self.CaptureMouse()
        self.SetFocus()
        self.Refresh()
        event.Skip()


    def OnLeftUp(self, event):
        if not self.IsEnabled() or not self.HasCapture():
            return
        if self.HasCapture():
            self.ReleaseMouse()
            if not self.up:    # if the button was down when the mouse was released...
                self.Notify()
            self.up = True
            if self:           # in case the button was destroyed in the eventhandler
                self.Refresh()
                event.Skip()


    def OnMotion(self, event):
        if not self.IsEnabled() or not self.HasCapture():
            return
        if event.LeftIsDown() and self.HasCapture():
            x,y = event.GetPositionTuple()
            w,h = self.GetClientSizeTuple()
            if self.up and x<w and x>=0 and y<h and y>=0:
                self.up = False
                self.Refresh()
                return
            if not self.up and (x<0 or y<0 or x>=w or y>=h):
                self.up = True
                self.Refresh()
                return
        event.Skip()


    def OnGainFocus(self, event):
        self.hasFocus = True
        self.Refresh()
        self.Update()


    def OnLoseFocus(self, event):
        self.hasFocus = False
        self.Refresh()
        self.Update()


    def OnKeyDown(self, event):
        if self.hasFocus and event.KeyCode() == ord(" "):
            self.up = False
            self.Refresh()
        event.Skip()


    def OnKeyUp(self, event):
        if self.hasFocus and event.KeyCode() == ord(" "):
            self.up = True
            self.Notify()
            self.Refresh()
        event.Skip()


#----------------------------------------------------------------------

class GenBitmapButton(GenButton):
    """A generic bitmap button."""

    def __init__(self, parent, id=-1, bitmap=wx.NullBitmap,
                 pos = wx.DefaultPosition, size = wx.DefaultSize,
                 style = 0, validator = wx.DefaultValidator,
                 name = "genbutton"):
        self.bmpDisabled = None
        self.bmpFocus = None
        self.bmpSelected = None
        self.SetBitmapLabel(bitmap)
        GenButton.__init__(self, parent, id, "", pos, size, style, validator, name)


    def GetBitmapLabel(self):
        return self.bmpLabel
    def GetBitmapDisabled(self):
        return self.bmpDisabled
    def GetBitmapFocus(self):
        return self.bmpFocus
    def GetBitmapSelected(self):
        return self.bmpSelected


    def SetBitmapDisabled(self, bitmap):
        """Set bitmap to display when the button is disabled"""
        self.bmpDisabled = bitmap

    def SetBitmapFocus(self, bitmap):
        """Set bitmap to display when the button has the focus"""
        self.bmpFocus = bitmap
        self.SetUseFocusIndicator(False)

    def SetBitmapSelected(self, bitmap):
        """Set bitmap to display when the button is selected (pressed down)"""
        self.bmpSelected = bitmap

    def SetBitmapLabel(self, bitmap, createOthers=True):
        """
        Set the bitmap to display normally.
        This is the only one that is required. If
        createOthers is True, then the other bitmaps
        will be generated on the fly.  Currently,
        only the disabled bitmap is generated.
        """
        self.bmpLabel = bitmap
        if bitmap is not None and createOthers:
            image = wx.ImageFromBitmap(bitmap)
            imageutils.grayOut(image)
            self.SetBitmapDisabled(wx.BitmapFromImage(image))


    def _GetLabelSize(self):
        """ used internally """
        if not self.bmpLabel:
            return -1, -1, False
        return self.bmpLabel.GetWidth()+2, self.bmpLabel.GetHeight()+2, False

    def DrawLabel(self, dc, width, height, dw=0, dy=0):
        bmp = self.bmpLabel
        if self.bmpDisabled and not self.IsEnabled():
            bmp = self.bmpDisabled
        if self.bmpFocus and self.hasFocus:
            bmp = self.bmpFocus
        if self.bmpSelected and not self.up:
            bmp = self.bmpSelected
        bw,bh = bmp.GetWidth(), bmp.GetHeight()
        if not self.up:
            dw = dy = self.labelDelta
        hasMask = bmp.GetMask() != None
        dc.DrawBitmap(bmp, (width-bw)/2+dw, (height-bh)/2+dy, hasMask)


#----------------------------------------------------------------------


class GenBitmapTextButton(GenBitmapButton):
    """A generic bitmapped button with text label"""
    def __init__(self, parent, id=-1, bitmap=wx.NullBitmap, label='',
                 pos = wx.DefaultPosition, size = wx.DefaultSize,
                 style = 0, validator = wx.DefaultValidator,
                 name = "genbutton"):
        GenBitmapButton.__init__(self, parent, id, bitmap, pos, size, style, validator, name)
        self.SetLabel(label)


    def _GetLabelSize(self):
        """ used internally """
        w, h = self.GetTextExtent(self.GetLabel())
        if not self.bmpLabel:
            return w, h, True       # if there isn't a bitmap use the size of the text

        w_bmp = self.bmpLabel.GetWidth()+2
        h_bmp = self.bmpLabel.GetHeight()+2
        width = w + w_bmp
        if h_bmp > h:
            height = h_bmp
        else:
            height = h
        return width, height, True


    def DrawLabel(self, dc, width, height, dw=0, dy=0):
        bmp = self.bmpLabel
        if bmp != None:     # if the bitmap is used
            if self.bmpDisabled and not self.IsEnabled():
                bmp = self.bmpDisabled
            if self.bmpFocus and self.hasFocus:
                bmp = self.bmpFocus
            if self.bmpSelected and not self.up:
                bmp = self.bmpSelected
            bw,bh = bmp.GetWidth(), bmp.GetHeight()
            if not self.up:
                dw = dy = self.labelDelta
            hasMask = bmp.GetMask() != None
        else:
            bw = bh = 0     # no bitmap -> size is zero

        dc.SetFont(self.GetFont())
        if self.IsEnabled():
            dc.SetTextForeground(self.GetForegroundColour())
        else:
            dc.SetTextForeground(wx.SystemSettings.GetColour(wx.SYS_COLOUR_GRAYTEXT))

        label = self.GetLabel()
        tw, th = dc.GetTextExtent(label)        # size of text
        if not self.up:
            dw = dy = self.labelDelta

        pos_x = (width-bw-tw)/2+dw      # adjust for bitmap and text to centre
        if bmp !=None:
            dc.DrawBitmap(bmp, pos_x, (height-bh)/2+dy, hasMask) # draw bitmap if available
            pos_x = pos_x + 2   # extra spacing from bitmap

        dc.DrawText(label, pos_x + dw+bw, (height-th)/2+dy)      # draw the text


#----------------------------------------------------------------------


class __ToggleMixin:
    def SetToggle(self, flag):
        self.up = not flag
        self.Refresh()
    SetValue = SetToggle

    def GetToggle(self):
        return not self.up
    GetValue = GetToggle

    def OnLeftDown(self, event):
        if not self.IsEnabled():
            return
        self.saveUp = self.up
        self.up = not self.up
        self.CaptureMouse()
        self.SetFocus()
        self.Refresh()

    def OnLeftUp(self, event):
        if not self.IsEnabled() or not self.HasCapture():
            return
        if self.HasCapture():
            self.ReleaseMouse()
            self.Refresh()
            if self.up != self.saveUp:
                self.Notify()

    def OnKeyDown(self, event):
        event.Skip()

    def OnMotion(self, event):
        if not self.IsEnabled():
            return
        if event.LeftIsDown() and self.HasCapture():
            x,y = event.GetPositionTuple()
            w,h = self.GetClientSizeTuple()
            if x<w and x>=0 and y<h and y>=0:
                self.up = not self.saveUp
                self.Refresh()
                return
            if (x<0 or y<0 or x>=w or y>=h):
                self.up = self.saveUp
                self.Refresh()
                return
        event.Skip()

    def OnKeyUp(self, event):
        if self.hasFocus and event.KeyCode() == ord(" "):
            self.up = not self.up
            self.Notify()
            self.Refresh()
        event.Skip()




class GenToggleButton(__ToggleMixin, GenButton):
    """A generic toggle button"""
    pass

class GenBitmapToggleButton(__ToggleMixin, GenBitmapButton):
    """A generic toggle bitmap button"""
    pass

class GenBitmapTextToggleButton(__ToggleMixin, GenBitmapTextButton):
    """A generic toggle bitmap button with text label"""
    pass

#----------------------------------------------------------------------