我们从Python开源项目中，提取了以下10个代码示例，用于说明如何使用wx.ScreenDC()。
def FontForLabels(self, dc): ''' Return the default GUI font, scaled for printing if necessary. ''' font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT) scale = dc.GetPPI()[0] / wx.ScreenDC().GetPPI()[0] font.SetPointSize(scale*font.GetPointSize()) return font
def __init__(self, parent): self.panel = wx.ScrolledWindow.__init__(self, parent) self.SetScrollRate(5, 5) self.panelphase = self.GetParent().panelphase self.panelvisual = self.GetParent().panelvisual self.cmvbox = wx.BoxSizer(wx.VERTICAL) self.cmhbox = [] self.imglist = [] self.sellist = [] self.rb = [] self.chkb = [] array = self.panelphase.cms[0][1] dc = wx.ScreenDC() dc.SetFont(self.panelvisual.font) w,h = dc.GetTextExtent("TestString") height = h if IsNotWX4(): image = wx.EmptyImage(array.shape[0],height) else: image = wx.Image(array.shape[0],height) newarray = numpy.zeros((height, array.shape[0], 3), dtype=numpy.uint8) for i in range(self.panelphase.cms.shape[0]): self.cmhbox.append( wx.BoxSizer(wx.HORIZONTAL) ) name = self.panelphase.cms[i][0] array = self.panelphase.cms[i][1] for j in range(height): newarray[j,:,:] = numpy.uint8(255.0*array) image.SetData( newarray.tostring()) bmp = image.ConvertToBitmap() self.imglist.append(wx.StaticBitmap(self, -1, bmp)) self.rb.append( wx.RadioButton(self, -1, label=name, size=(160, height) ) ) self.cmhbox[-1].Add(self.rb[-1], 0) self.cmhbox[-1].Add((5, -1)) self.cmhbox[-1].Add(self.imglist[-1], 1, wx.EXPAND) self.chkb.append( wx.CheckBox(self, -1, 'Reverse', size=(160, height)) ) self.cmhbox[-1].Add(self.chkb[-1], 0, wx.EXPAND) self.cmvbox.Add(self.cmhbox[-1], 1, wx.EXPAND) self.SetSizer(self.cmvbox) self.Fit() self.Layout() self.Show()
def __init__(self, parent, name, objectpath, textwidth, file_extension): def assign(input): self.objectpath.ChangeValue(input) def OnBrowse(self): if IsNotWX4(): dlg = wx.FileDialog(parent, 'Choose a file', os.getcwd(), '', file_extension, wx.OPEN) else: dlg = wx.FileDialog(parent, 'Choose a file', os.getcwd(), '', file_extension, wx.FD_OPEN) if dlg.ShowModal() == wx.ID_OK: assign(dlg.GetPath()) dlg.Destroy() def OnEdit(event): self.objectpath.ChangeValue(event.GetString()) fontpointsize=wx.SystemSettings.GetFont(wx.SYS_SYSTEM_FONT).GetPointSize() self.font = wx.Font(fontpointsize, wx.FONTFAMILY_SWISS, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL) dc = wx.ScreenDC() dc.SetFont(self.font) textw,texth = dc.GetTextExtent(name) if textw > textwidth: labelw = textw else: labelw = textwidth wx.BoxSizer.__init__(self, wx.HORIZONTAL) self.label = StaticTextNew(parent, -1, name, style =wx.ALIGN_RIGHT, size=(labelw,-1) ) self.label.SetFont(self.font) self.Add( self.label, 0, wx.CENTER ) self.objectpath = TextCtrlNew(parent, -1) self.objectpath.SetFont(self.font) self.objectpath.SetValue(objectpath) self.objectpath.SetToolTipNew("Browse for file or type "+os.linesep+"path and name") self.objectpath.Bind(wx.EVT_TEXT_ENTER, OnEdit) self.Add( self.objectpath, 1, wx.CENTER |wx.EXPAND ) self.button = ButtonNew(parent, -1, "Browse") self.button.SetFont(self.font) self.button.SetToolTipNew("Browse for file or type "+os.linesep+"path and name") self.button.Bind(wx.EVT_BUTTON, OnBrowse) self.Add( self.button, 0, wx.LEFT|wx.CENTER)
def __init__(self, parent, name, init, stextwidth): def OnEdit(event): text = event.GetString() point = self.value.GetInsertionPoint() if (IsNumber(self.value.GetValue()) == False): self.value.SetBackgroundColour( "Pink" ) self.value.SetForegroundColour( "Black" ) else: self.value.SetBackgroundColour(wx.NullColour) self.value.SetForegroundColour(wx.NullColour) self.value.ChangeValue(text) self.value.SetInsertionPoint(point) fontpointsize=wx.SystemSettings.GetFont(wx.SYS_SYSTEM_FONT).GetPointSize() self.font = wx.Font(fontpointsize, wx.FONTFAMILY_SWISS, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL) wx.BoxSizer.__init__(self, wx.HORIZONTAL) dc = wx.ScreenDC() dc.SetFont(self.font) textw,texth = dc.GetTextExtent(name) if textw > stextwidth: labelw = textw else: labelw = stextwidth self.label = StaticTextNew(parent, -1, name, style =wx.ALIGN_RIGHT, size=(labelw,-1) ) self.label.SetFont(self.font) self.Add( self.label, 0, wx.CENTER ) self.value = TextCtrlNew(parent, value=str(init), style=wx.TE_PROCESS_ENTER) self.value.SetWindowStyle(wx.TE_RIGHT) self.value.SetFont(self.font) self.value.Bind(wx.EVT_TEXT, OnEdit) self.Add( self.value, 1, wx.CENTER|wx.EXPAND )
def saveImage(canvas, filename): s = wx.ScreenDC() w, h = canvas.size.Get() b = wx.EmptyBitmap(w, h) m = wx.MemoryDCFromDC(s) m.SelectObject(b) m.Blit(0, 0, w, h, s, 70, 0) m.SelectObject(wx.NullBitmap) b.SaveFile(filename, wx.BITMAP_TYPE_PNG)
def FontForLabels(self, dc): ''' Return the default GUI font, scaled for printing if necessary. ''' font = wx.SystemSettings_GetFont(wx.SYS_DEFAULT_GUI_FONT) scale = dc.GetPPI()[0] / wx.ScreenDC().GetPPI()[0] font.SetPointSize(scale*font.GetPointSize()) return font
def take_screenshot(self): screen = wx.ScreenDC() bmp = wx.Bitmap(Screenshot.SRC_W, Screenshot.SRC_H) mem = wx.MemoryDC(bmp) mem.Blit(0, 0, Screenshot.SRC_W, Screenshot.SRC_H, screen, Screenshot.OFFSET_X, Screenshot.OFFSET_Y) return bmp
def __init__(self, parent, name, smax, smin, sinc, sinit, stextwidth, swidth): if abs(sinc) < 1.0: self.precision = "%."+str(str(sinc)[::-1].find('.'))+"f" else: self.precision = "%d" def OnSpin(pos): self.value.ChangeValue(self.precision%(sinc * pos + self.remainder)) def OnEdit(event): text = event.GetString() point = self.value.GetInsertionPoint() if (IsNumber(self.value.GetValue()) == False): self.value.SetBackgroundColour( "Pink" ) self.value.SetForegroundColour( "Black" ) else: self.value.SetBackgroundColour(wx.NullColour) self.value.SetForegroundColour(wx.NullColour) self.value.ChangeValue(text) self.value.SetInsertionPoint(point) if ( text == '' or text == '.'): self.spin.SetValue(smin/sinc); try: self.spin.SetValue(int(float(text)/sinc)) except: pass event.Skip() fontpointsize=wx.SystemSettings.GetFont(wx.SYS_SYSTEM_FONT).GetPointSize() self.font = wx.Font(fontpointsize, wx.FONTFAMILY_SWISS, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL) dc = wx.ScreenDC() dc.SetFont(self.font) textw,texth = dc.GetTextExtent(name) if textw > stextwidth: labelw = textw else: labelw = stextwidth wx.BoxSizer.__init__(self, wx.HORIZONTAL) self.label = StaticTextNew(parent, -1, name, style=wx.ALIGN_RIGHT, size=(labelw,-1) ) self.label.SetFont(self.font) self.Add( self.label, 0, wx.CENTER ) self.value = TextCtrlNew(parent, value=str(sinit),size=(swidth, -1), style=wx.TE_PROCESS_ENTER) self.value.SetWindowStyle(wx.TE_RIGHT) self.value.SetFont(self.font) self.value.Bind(wx.EVT_TEXT, OnEdit) self.Add( self.value, 0, wx.CENTER ) bw,bh = dc.GetTextExtent("0") spinw = int(1.5*bh) self.spin = SpinButtonNew(parent, size=(spinw,-1), spinfunc=OnSpin) self.spin.SetRange(int(smin/sinc), int(smax/sinc)) self.spin.SetValue(int(sinit/sinc)) self.remainder = smin%sinc self.Add( self.spin, 0, wx.CENTER ) self.IsEnabled = True self.Layout() self.Show()
def onTakeScreenShot(self, event): """ Takes a screenshot of the screen at give pos & size (rect). Method based on a script by Andrea Gavana """ print('Taking screenshot...') rect = self.GetRect() # adjust widths for Linux (figured out by John Torres # http://article.gmane.org/gmane.comp.python.wxpython/67327) if sys.platform == 'linux2': client_x, client_y = self.ClientToScreen((0, 0)) border_width = client_x - rect.x title_bar_height = client_y - rect.y rect.width += (border_width * 2) rect.height += title_bar_height + border_width # Create a DC for the whole screen area dcScreen = wx.ScreenDC() # Create a Bitmap that will hold the screenshot image later on # Note that the Bitmap must have a size big enough to hold the screenshot # -1 means using the current default colour depth bmp = wx.EmptyBitmap(rect.width, rect.height) #Create a memory DC that will be used for actually taking the screenshot memDC = wx.MemoryDC() # Tell the memory DC to use our Bitmap # all drawing action on the memory DC will go to the Bitmap now memDC.SelectObject(bmp) # Blit (in this case copy) the actual screen on the memory DC # and thus the Bitmap memDC.Blit( 0, # Copy to this X coordinate 0, # Copy to this Y coordinate rect.width, # Copy this width rect.height, # Copy this height dcScreen, # Where to copy from rect.x, # What's the X offset in the original DC? rect.y # What's the Y offset in the original DC? ) # Select the Bitmap out of the memory DC by selecting a new # uninitialized Bitmap memDC.SelectObject(wx.NullBitmap) img = bmp.ConvertToImage() fileName = "myImage.png" img.SaveFile(fileName, wx.BITMAP_TYPE_PNG) print('...saving as png!')
