在wxPython中创建形状窗口的最简单方法是什么？

Question

我想在wxPython中创建一个简单的形状窗口。大致上，我想做的事情是实现wxPython中类似于Tkinter的self.overrideredirect(1)的功能（这个功能可以去掉默认的操作系统边框），然后把窗口的角弄成圆的。

Answer 1

大家好，我知道有一个被认可的答案，我在Ubuntu上用Python 2.x的时候用过这个答案。但是当我在Windows上用Python 3.x试的时候，它没有用。所以我做了一些小研究，修复了这个问题（wx.Region需要一个透明的颜色，下面的代码可以看到）。同时我还修改了几个已经不推荐使用的方法：

import wx

IMAGE_PATH = ".\Images\myImageFile.png"

class ShapedFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "Shaped Window",
                style = wx.FRAME_SHAPED | wx.SIMPLE_BORDER )
        self.hasShape = False
        self.delta = wx.Point(0,0)

        # Load the image

        self.bmp = wx.Image(IMAGE_PATH, wx.BITMAP_TYPE_ANY).ConvertToBitmap()
        #self.bmp = wx.Bitmap(image)

        self.transparentColour = wx.Colour(255, 255, 255, alpha=wx.ALPHA_OPAQUE)

        self.SetClientSize((self.bmp.GetWidth(), self.bmp.GetHeight()))
        dc = wx.ClientDC(self)
        dc.DrawBitmap(self.bmp, 0,0, True)
        self.SetWindowShape()
        self.Bind(wx.EVT_LEFT_DCLICK, self.OnDoubleClick)
        self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
        self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
        self.Bind(wx.EVT_MOTION, self.OnMouseMove)
        self.Bind(wx.EVT_RIGHT_UP, self.OnExit)
        self.Bind(wx.EVT_PAINT, self.OnPaint)
        self.Bind(wx.EVT_WINDOW_CREATE, self.SetWindowShape)

    def SetWindowShape(self, evt=None):
        r = wx.Region(self.bmp , self.transparentColour)
        self.hasShape = self.SetShape(r)

    def OnDoubleClick(self, evt):
        if self.hasShape:
            self.SetShape(wx.Region())
            self.hasShape = False
        else:
            self.SetWindowShape()

    def OnPaint(self, evt):
        dc = wx.PaintDC(self)
        dc.DrawBitmap(self.bmp, 0, 0, True)

    def OnExit(self, evt):
        self.Close()

    def OnLeftDown(self, evt):
        self.CaptureMouse()
        pos = self.ClientToScreen(evt.GetPosition())
        origin = self.GetPosition()
        self.delta = wx.Point(pos.x - origin.x, pos.y - origin.y)

    def OnMouseMove(self, evt):
        if evt.Dragging() and evt.LeftIsDown():
            pos = self.ClientToScreen(evt.GetPosition())
            newPos = (pos.x - self.delta.x, pos.y - self.delta.y)
            self.Move(newPos)

    def OnLeftUp(self, evt):
        if self.HasCapture():
            self.ReleaseMouse()


if __name__ == '__main__':
    app = wx.App()
    ShapedFrame().Show()
    app.MainLoop()

Answer 2

wxPython的演示中有一个关于形状框架的示例。抱歉给出的链接不是直接的来源。最初它们是作为Windows安装包提供的，你可以在这里下载：

源代码

你需要查看shaped_frame_mobile.py或shaped_frame.py这两个文件，它们都调用了列表中的images.py来获取示例窗口的位图。这并不完全等同于overrideredirect，因为你需要提供一个图像来绘制框架，但它仍然可以帮助你实现类似的效果。

重要的部分是那些根据位图设置窗口形状的函数，以及处理wx.EVT_PAINT事件的部分：

def SetWindowShape(self, evt=None):
    r = wx.RegionFromBitmap(self.bmp)
    self.hasShape = self.SetShape(r)

def OnPaint(self, evt):
    dc = wx.PaintDC(self)
    dc.DrawBitmap(self.bmp, 0,0, True)

补充 - 这里有一个修改过的shaped_frame_mobile.py，它加载了在IMAGE_PATH变量中指定的.png图像。你可以修改这个路径，指向你的图像：

import wx

# Create a .png image with something drawn on a white background
# and put the path to it here.
IMAGE_PATH = '/python26/projects/shapedwin/image.png'


class ShapedFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "Shaped Window",
                style = wx.FRAME_SHAPED | wx.SIMPLE_BORDER )
        self.hasShape = False
        self.delta = wx.Point(0,0)

        # Load the image
        image = wx.Image(IMAGE_PATH, wx.BITMAP_TYPE_PNG)
        image.SetMaskColour(255,255,255)
        image.SetMask(True)            
        self.bmp = wx.BitmapFromImage(image)

        self.SetClientSize((self.bmp.GetWidth(), self.bmp.GetHeight()))
        dc = wx.ClientDC(self)
        dc.DrawBitmap(self.bmp, 0,0, True)
        self.SetWindowShape()
        self.Bind(wx.EVT_LEFT_DCLICK, self.OnDoubleClick)
        self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
        self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
        self.Bind(wx.EVT_MOTION, self.OnMouseMove)
        self.Bind(wx.EVT_RIGHT_UP, self.OnExit)
        self.Bind(wx.EVT_PAINT, self.OnPaint)
        self.Bind(wx.EVT_WINDOW_CREATE, self.SetWindowShape)

    def SetWindowShape(self, evt=None):
        r = wx.RegionFromBitmap(self.bmp)
        self.hasShape = self.SetShape(r)

    def OnDoubleClick(self, evt):
        if self.hasShape:
            self.SetShape(wx.Region())
            self.hasShape = False
        else:
            self.SetWindowShape()

    def OnPaint(self, evt):
        dc = wx.PaintDC(self)
        dc.DrawBitmap(self.bmp, 0,0, True)

    def OnExit(self, evt):
        self.Close()

    def OnLeftDown(self, evt):
        self.CaptureMouse()
        pos = self.ClientToScreen(evt.GetPosition())
        origin = self.GetPosition()
        self.delta = wx.Point(pos.x - origin.x, pos.y - origin.y)

    def OnMouseMove(self, evt):
        if evt.Dragging() and evt.LeftIsDown():
            pos = self.ClientToScreen(evt.GetPosition())
            newPos = (pos.x - self.delta.x, pos.y - self.delta.y)
            self.Move(newPos)

    def OnLeftUp(self, evt):
        if self.HasCapture():
            self.ReleaseMouse()



if __name__ == '__main__':
    app = wx.PySimpleApp()
    ShapedFrame().Show()
    app.MainLoop()