wxPython之wx.DC绘制形状
本文实例为大家分享了wxPython绘制形状的具体代码,供大家参考,具体内容如下
绘制形状
除了绘制文本和位图,DC也可以绘制任意的形状和线。这允许我们完全自定义窗口部件和控件的外观。
示例说明
利用PaintDC创建一个简单笑脸控件。
#-*-coding: UTF-8 -*- #------------------------------------------------------ #Purpose: nothing.... #Author: 阿Bin先生 #Created: 2017年5月21日 #------------------------------------------------------ import wx class Smiley(wx.PyControl): def __init__(self, parent, size=(100, 100)): super(Smiley, self).__init__(parent, size=size, style=wx.NO_BORDER) # Event Handlers self.Bind(wx.EVT_PAINT, self.OnPaint) def OnPaint(self, event): """Draw the image on to the panel""" dc = wx.PaintDC(self) # Must create a PaintDC # Get the working rectangle we can draw in rect = self.GetClientRect() # Setup the DC dc.SetPen(wx.BLACK_PEN) # for drawing lines / borders yellowbrush = wx.Brush(wx.Colour(255, 255, 0)) dc.SetBrush(yellowbrush) # Yellow fill cx = (rect.width / 2) + rect.x cy = (rect.width / 2) + rect.y radius = min(rect.width, rect.height) / 2 dc.DrawCircle(cx, cy, radius) eyesz = (rect.width / 8, rect.height / 8) eyepos = (cx / 2, cy / 2) dc.SetBrush(wx.BLUE_BRUSH) dc.DrawRectangle(eyepos[0], eyepos[1], eyesz[0], eyesz[1]) eyepos = (eyepos[0] + (cx - eyesz[0]), eyepos[1]) dc.DrawRectangle(eyepos[0], eyepos[1], eyesz[0], eyesz[1]) dc.SetBrush(yellowbrush) startpos = (cx / 2, (cy / 2) + cy) endpos = (cx + startpos[0], startpos[1]) dc.DrawArc(startpos[0], startpos[1], endpos[0], endpos[1], cx, cy) dc.SetPen(wx.TRANSPARENT_PEN) dc.DrawRectangle(startpos[0], cy, endpos[0] - startpos[0], startpos[1] - cy) class MyFrame(wx.Frame): def __init__(self, parent, *args, **kwargs): super(MyFrame, self).__init__(parent, *args, **kwargs) # Attributes self.Panel = wx.Panel(self) Smiley(self.Panel) class MyApp(wx.App): def OnInit(self): self.frame = MyFrame(None, title="DrawShapes",size = [500, 500]) self.SetTopWindow(self.frame) self.frame.Show() return True if __name__ == "__main__": app = MyApp(False) app.MainLoop()
运行结果:
示例分析
DC的SetPen用来绘制线条和形状的边框。DC的SetBrush用来填充颜色。首先使用DCdeDrawCircle绘制一个黑色边框的黄色圆,表示头。然后使用DrawRectangle方法绘制蓝色矩形,表示眼睛。最后使用DC的DrawArch方法绘制扇形,因为只想用圆弧来表示微笑,所以用矩形覆盖圆弧两端的两条半径线。
常用的基本绘制函数
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
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