如何在wxpython中绘制透明框架

问题描述

更新我完全改掉了这个问题

UPDATE I completely rephrased the question

我想创建一个带有圆角的窗口，该窗口也是半透明的.

I want to create a window with round corners, that's also semi-transparent.

我通过调用SetTransparent( alpha )方法设法使框架半透明，但是，我仍然不知道如何使窗口没有背景.

I managed to make a frame semi-transparent by calling the SetTransparent( alpha ) method, however, I still don't know how to make the window have no background.

我试图获取窗口的设备上下文(dc)，并将背景笔刷设置为wx.TRANSPARENT_BRUSH，但这似乎没有任何作用.

I tried to get the device context (dc) of the window and set the background brush to wx.TRANSPARENT_BRUSH but that doesn't seem to have any effect.

例如，我正在寻求一种类似于此的效果，但是我想不使用位图(即不使用任何外部媒体文件)来做到这一点.

I'm seeking a kind of effect similar to this for instance, but I want to do it without using a bitmap (i.e. without any external media file).

如何将背景设置为空?

似乎我想要的是成形窗口".我正在进一步研究那个，但问题仍然是:如何在不使用任何外部媒体文件的情况下制作一个(即纯粹在代码中).

it seems what I want is called "shaped window". I'm looking a bit further into that, but still the question is: how can I make one without using any external media file (i.e. purely in code).

推荐答案

令人惊讶的是，没有人给出答案..

It's surprising that no one gave an answer ..

是的，正如FogleBird所说的，它是用SetShape完成的，但是问题是如何在不使用图像文件的情况下获得圆形矩形的形状.

Yes, as FogleBird said, it's done with SetShape, but the question is how to get a shape for a ronded rectangle without using an image file.

我找到了一种方法，那就是创建一个空的位图并使用内存dc在其上绘制一个圆角矩形

I found one way to do that, which is to create an empty bitmap and draw on it a rounded rectangle using a memory dc

def GetRoundBitmap( w, h, radius ):
    maskColor = wx.Color(0,0,0)
    shownColor = wx.Color(5,5,5)
    b = wx.EmptyBitmap(w,h)
    dc = wx.MemoryDC()
    dc.SelectObject(b)
    dc.SetBrush(wx.Brush(maskColor))
    dc.DrawRectangle(0,0,w,h)
    dc.SetBrush(wx.Brush(shownColor))
    dc.DrawRoundedRectangle(0,0,w,h,radius)
    dc.SelectObject(wx.NullBitmap)
    b.SetMaskColour(maskColor)
    return b

def GetRoundShape( w, h, r ):
    return wx.RegionFromBitmap( GetRoundBitmap(w,h,r) )

我发现的一个问题是形状是安静的别名.窗口不是一个好看的窗口，但是总比没有好.

One problem I found is that the shape is quiet aliased. Not exactly a nice/fancy window, but better than nothing.

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