我正在编写需要选择屏幕区域的应用程序。我需要将光标更改为十字形,然后在用户选择上绘制一个矩形 - 这是成功的(尽管错误不断出现,我正在使用“已弃用的'函数 - 避风港&#39 ; t想到如何解决这个问题)。
主要问题 - 当我将窗口更改为完全透明(通过设置self.SetTransparent(0))时,选择矩形也变得透明,因此我无法使窗口完全透明并仍然看到选择。
以下是代码:
import wx
class SelectableFrame(wx.Frame):
c1 = None
c2 = None
def __init__(self, parent=None, id=-1, title=""):
wx.Frame.__init__(self, parent, id, title, size=wx.DisplaySize())
self.panel = wx.Panel(self, size=self.GetSize())
self.panel.Bind(wx.EVT_MOTION, self.OnMouseMove)
self.panel.Bind(wx.EVT_LEFT_DOWN, self.OnMouseDown)
self.panel.Bind(wx.EVT_LEFT_UP, self.OnMouseUp)
self.panel.Bind(wx.EVT_PAINT, self.OnPaint)
self.SetCursor(wx.StockCursor(wx.CURSOR_CROSS))
self.SetTransparent(10)
def OnMouseMove(self, event):
if event.Dragging() and event.LeftIsDown():
self.c2 = event.GetPosition()
self.Refresh()
def OnMouseDown(self, event):
self.c1 = event.GetPosition()
def OnMouseUp(self, event):
self.SetCursor(wx.StockCursor(wx.CURSOR_ARROW))
def OnPaint(self, event):
if self.c1 is None or self.c2 is None: return
dc = wx.PaintDC(self.panel)
dc.SetPen(wx.Pen('red', 2))
dc.SetBrush(wx.TRANSPARENT_BRUSH)
dc.DrawRectangle(self.c1.x, self.c1.y, self.c2.x - self.c1.x, self.c2.y - self.c1.y)
def PrintPosition(self, pos):
return str(pos.x) + " " + str(pos.y)
class MyApp(wx.App):
def OnInit(self):
frame = SelectableFrame()
frame.Show(True)
self.SetTopWindow(frame)
return True
app = MyApp(0)
app.MainLoop()
如何使窗口透明但保持选择可见?