Python/wxPython/Graphics

wx.DC hierarchy

Error: : syntax error in line 54 near '.'

digraph DC {

	// options
	// theme = warm
	// usage = 

	// default settings of graphs
	graph [
		rankdir   = LR,
		color     = "#804000",
		bgcolor   = "#fffff7",
		fontcolor = "#000000",
		fontsize  = 12,
		style     = dashed,
		gradientangle = 65,

				splines = ortho,
		
		
			];

	// default settings of nodes
	node [
				shape = box,
		style = "filled,rounded",
		
		height    = 0.3,
		fontsize  = 10,
		
		// theme
		color     = "#c07000",
		fontcolor = "#000000",
		fillcolor = "#ffffff:#ffffc0",
		gradientangle = 295 // left, top -> right, bottom
	];

	// default settings of edges
	edge [
		color     = "#704000",
		fontcolor = "#704000",
		fontsize  = 10,
		arrowsize = 0.6
	];

	
	// nodes, edges, and clusters
	rankdir=BT;

A [label="wx.DC"];
B1 [label="wx.WindowDC"];
B2 [label="wx.MemoryDC"];
C [label="wx.ClientDC"];
D [label="wx.PaintDC"];
E [label="wx.BufferedDC];
F [label="wx.BufferedPaintDC];
G [label="wx.AutoBufferedPaintDC];

D -> C;
C -> B1;
{B1 B2} -> A;
G -> F -> E -> B2;
	
}

Draw line by PaintDC

#!/usr/bin/env python3
import wx

class MyApp(wx.App):

    def OnInit(self):
        frame = wx.Frame(None, -1, 'Hello World!')
        frame.Bind(wx.EVT_PAINT, self.OnPaint)
        frame.Show()
        self.mainFrame = frame
        return True

    def OnPaint(self, evt):
        dc = wx.PaintDC(self.mainFrame)
        dc.DrawLine(10, 10, 200, 10)

if __name__ == '__main__':
    app = MyApp()
    app.MainLoop()

Draw line by Cairo

• Context class of PyCairo
• Context class of CairoCFFI

#!/usr/bin/env python3
import wx
import wx.lib.wxcairo

class MyApp(wx.App):

    def OnInit(self):
        frame = wx.Frame(None, -1, 'Hello World!')
        frame.Bind(wx.EVT_PAINT, self.OnPaint)
        frame.Show()
        self.mainFrame = frame
        return True

    def OnPaint(self, evt):
        dc = wx.PaintDC(self.mainFrame)
        ctx = wx.lib.wxcairo.ContextFromDC(dc)
        ctx.set_line_width(5)
        ctx.move_to(10, 20)
        ctx.line_to(200, 20)
        ctx.stroke()

if __name__ == '__main__':
    app = MyApp()
    app.MainLoop()