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我正在尝试用漂亮的颜色渐变和文字制作一个小图形

颜色渐变现在可以正常工作（仅测试所以代码仍然很乱）但文本没有显示

有人可以告诉我我的代码有什么问题吗？

#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
Created on Tue Apr 24 13:31:18 2012

@author: ksr
"""
import os
import scipy
import pickle
import shutil
import matplotlib.pyplot as plt
from os.path import join as opj
from os import getcwd as cwd
from os import listdir as ld
import wx

def dec2hex(n):
"""return the hexadecimal string representation of integer n"""
return "%X" % n

def hex2dec(s):
    """return the integer value of a hexadecimal string s"""
    return int(s, 16)

def main(text):

    app         = wx.PySimpleApp()

    # Bitmap und DC (Device Context) erstellen
    bitmap      = wx.EmptyBitmap(width = 500, height = 500)
    dc          = wx.MemoryDC(bitmap) # Dieser DC zeichnet nur im Speicher

    # Hintergrund gelb ausmalen
    dc.SetBackground(wx.Brush('#FFFFFF', wx.SOLID))
    dc.Clear()

    # GraphicsContext erstellen (damit sehen die Bilder besser aus)
    gc = wx.GraphicsContext_Create(dc)

    x = 0
    y = 0
    far = 0
    z = 0
    for i in range(0,2001):

        if z%5 == 0 and i < 1000:
            far += 1
            z = 0
        elif z%5 == 0 and i > 1000:
            far -= 1
            z = 0
        farbe = dec2hex(far)


        # Grünen Stift zuweisen
        pen = wx.Pen("#%s0000"%(str(farbe.rjust(2,'0'))), 2, wx.SOLID)#,str(farbe.rjust(2,'0'))
        gc.SetPen(pen)

        # Zwei horizontale Linien zeichnen
        gc.DrawLines(((x, y), (256, 256)))

        print x,y,farbe.rjust(2,'0'),i

        if x < 500 and y == 0:
            x+=1

        elif x == 500 and y < 500: 
            y+=1

        elif y == 500 and x > 0:
            x-=1

        elif x == 0 and y > 0:
            y-=1
        z+=1    

    gc.DrawText('Hello',100,100)    

    # Bitmap vom DC abtrennen und als PNG speichern
    dc.SelectObject(wx.NullBitmap)
    bitmap.SaveFile("new_image.png", wx.BITMAP_TYPE_PNG)


if __name__ == "__main__":
    main()
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1 回答 1

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当我运行你的代码时，我收到一个错误，因为没有定义字体，我不知道你是否遇到同样的问题，但是通过添加任何SetFont语句，就像你的代码工作正常gc.SetFont(wx.Font(22, wx.SWISS, wx.NORMAL, wx.BOLD))之前一样。DrawText

顺便说一句，我把300, 300你的“你好”文本作为坐标来绘制，因为100, 100它是黑底黑字，不可读。

于 2012-04-27T09:45:58.590 回答