TPaintBoxDemo 项目分析

项目信息

• 项目名称: TPaintBoxDemo
• 下载链接: TPaintBoxDemo.rar
• 分析时间: 2026-03-05

文件结构

TPaintBoxDemo/
├── Extractor_Icon.ico
├── Project1.py
├── Project1.xml
├── Unit1.py
├── Unit1.pydfm
├── Unit1.sct
├── Unit1.sfm

主程序文件: Project1.py

from glcl import *
from Unit1 import *

def main():
    Application.Initialize()
    Application.Title = 'Project1'
    Application.MainFormOnTaskbar = True
    Application.Icon.LoadFromFile(os.path.join(os.path.dirname(os.path.abspath(__file__)), "Extractor_Icon.ico"))
    MainForm = Form1(Application)
    MainForm.Show()
    FreeConsole()
    Application.Run()
    MainForm.Free()

if __name__ == '__main__':
    main()

单元文件: Unit1.py

import os
from glcl import *

class Form1(Form):

    def __init__(self, owner):
        self.Button1 = Button(self)
        self.PaintBox1 = PaintBox(self)
        self.LoadProps(os.path.join(os.path.dirname(os.path.abspath(__file__)), "Unit1.pydfm"))
        self.Button1.OnClick = self.Button1Click

        # 创建 TPaintBox 控件用于绘图
        self.paint_box = PaintBox(self)  # 创建 TPaintBox 实例
        self.paint_box.SetBounds(20, 20, 360, 200)  # 设置 TPaintBox 的位置和大小
        self.paint_box.Parent = self  # 将 TPaintBox 设置为窗体的子控件
        self.paint_box.OnPaint = self.on_paint  # 连接绘画事件到处理函数

    # 定义绘画事件处理函数
    def on_paint(self, Sender):
        canvas = self.paint_box.Canvas  # 获取 TPaintBox 的 Canvas 对象
        canvas.Brush.Color = clSkyBlue  # 设置画刷颜色为天蓝色
        # 注意FillRect传参不能直接写self.paint_box.ClientRect
        r = Rect(self.paint_box.ClientRect.Left, self.paint_box.ClientRect.Top,
            self.paint_box.ClientRect.Right, self.paint_box.ClientRect.Bottom)
        canvas.FillRect(r)  # 填充整个 TPaintBox 区域

        # 绘制一个红色矩形
        canvas.Brush.Color = clRed  # 设置画刷颜色为红色
        canvas.Rectangle(50, 50, 150, 150)  # 绘制一个矩形，坐标为 (50, 50) 到 (150, 150)

        # 绘制一个绿色矩形
        canvas.Brush.Color = clGreen  # 设置画刷颜色为绿色
        canvas.Rectangle(200, 50, 300, 150)  # 绘制另一个矩形，坐标为 (200, 50) 到 (300, 150)

    def Button1Click(self, Sender):
        canvas = self.PaintBox1.Canvas  # 获取 TPaintBox 的 Canvas 对象
        canvas.Brush.Color = clRed  # 设置画刷颜色为红色
        canvas.TextOut(10, 10, '文本输出')

设计文件: Unit1.sct

def Button1Click(Sender): 

设计文件: Unit1.sfm

object Form1: TForm
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 364
  ClientWidth = 584
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -15
  Font.Name = 'Segoe UI'
  Font.Style = []
  TextHeight = 20
  object PaintBox1: TPaintBox
    Left = 16
    Top = 216
    Width = 553
    Height = 89
  end
  object Button1: TButton
    Left = 494
    Top = 320
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 0
    OnClick = Button1Click
  end
end

其他文件

• Extractor_Icon.ico
• Project1.xml

详细分析

功能概述

GUI组件演示

使用的组件

• Form1 (TForm)
• PaintBox1 (TPaintBox)
• Button1 (TButton)

技术特点

• 包含3个GUI组件
• 定义1个事件处理

窗体属性

• caption: Button1
• height: 364
• width: 584

代码分析

导入的模块: - import os - from glcl import *

定义的类: - Form1

定义的方法: - init - on_paint - Button1Click

事件绑定: - self.Button1.OnClick = self.Button1Click

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