序

在上一节的CSDN里，实现了简单的显示。但是没有交互，这一节CSDN，主要就看看怎么交互的。

VAO

看来VAO是能用的。

游戏存档如下：

https://gitee.com/marchand/python-cad-gitee/tree/master/%E6%91%B8%E7%B4%A2%E7%95%8C%E9%9D%A2/2https://gitee.com/marchand/python-cad-gitee/tree/master/%E6%91%B8%E7%B4%A2%E7%95%8C%E9%9D%A2/2

鼠标拖动，滚轮缩放

怎么接受鼠标键盘的消息？

接受鼠标的消息https://blog.csdn.net/fgh1991/article/details/89851327?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522165042732416781683944230%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=165042732416781683944230&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-1-89851327.142%5Ev9%5Epc_search_result_cache,157%5Ev4%5Econtrol&utm_term=pyqt5+%E9%BC%A0%E6%A0%87%E9%94%AE%E7%9B%98&spm=1018.2226.3001.4187接受键盘的消息https://blog.csdn.net/m0_37828248/article/details/79766580?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522165042732416781683944230%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=165042732416781683944230&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-3-79766580.142%5Ev9%5Epc_search_result_cache,157%5Ev4%5Econtrol&utm_term=pyqt5+%E9%BC%A0%E6%A0%87%E9%94%AE%E7%9B%98&spm=1018.2226.3001.4187

怎么重绘OpenGL窗口？

啥update？update谁？

百度吧

OpenGL与update与pyqt5https://stackoverflow.com/questions/46834303/qglwidget-not-updating-pyqt5-and-opengl平移，缩放，还是滚轮缩放。

鼠标怎么拖动？

pyqt5事件与鼠标事件https://blog.csdn.net/weixin_45553177/article/details/104513333

鼠标拖动https://blog.csdn.net/qq_34765552/article/details/78981044?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522165046221216780264034973%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=165046221216780264034973&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-1-78981044.142%5Ev9%5Epc_search_result_cache,157%5Ev4%5Econtrol&utm_term=pyqt5+%E9%BC%A0%E6%A0%87%E6%8B%96%E5%8A%A8&spm=1018.2226.3001.4187PyQt5-如何操作鼠标位置，和跟踪鼠标https://jingyan.baidu.com/article/656db91843f4b4a381249cd2.htmlHow to draw a rectangle and adjust its shape by drag and drop in PyQt5https://stackoverflow.com/questions/44468775/how-to-draw-a-rectangle-and-adjust-its-shape-by-drag-and-drop-in-pyqt5控件的局部坐标系如下：

挺好的……拖动移动，滚轮缩放。

至此，OpenGL完全沦为一个绘图工具。。

存档：

实现了鼠标拖动，滚轮缩放https://gitee.com/marchand/python-cad-gitee/tree/master/%E6%91%B8%E7%B4%A2%E7%95%8C%E9%9D%A2/3

pyopengl的引入

pyqt教程里的这个代码。。看不懂。所以就想用pyopengl的，看着比较的熟悉。

参考了下这个

Basics of PyQt5 and PyOpenGLhttps://stackoverflow.com/questions/60234269/basics-of-pyqt5-and-pyopengl没有了一大堆陌生前缀的函数，正常运行。

存档:

用pyopengl代替了pyqt的函数https://gitee.com/marchand/python-cad-gitee/tree/master/%E6%91%B8%E7%B4%A2%E7%95%8C%E9%9D%A2/4

一定的UI交互

为什么叫一定的？因为不复杂，很简陋；不就是一定的吗？

这里其实也就获取一下参数就没了。。用不了多高级的UI。

PyQt5弹出窗口--QInputDialog, QMessageBox, QFileDialoghttps://blog.csdn.net/weixin_50113231/article/details/124102931获取一下数字

import sys
from PyQt5.QtWidgets import *


class MyWindow(QWidget):

    def __init__(self):
        super().__init__()

        self.setWindowTitle('PyQt5 弹出窗口')
        self.resize(400, 300)
        # 加了self为全局布局，没加为局部布局
        h1 = QHBoxLayout(self)
        btn = QPushButton('弹出窗口')
        btn.clicked.connect(self.do_btn)
        h1.addWidget(btn)

    def do_btn(self, event):  # 输入：整数

        # 后面四个数字的作用依次是 初始值 最小值 最大值 步幅
        value, ok = QInputDialog.getInt(self, "输入框标题", "这是提示信息\n\n请输入整数:", 37, -10000, 10000, 2)
        print(value)

        # # 1为默认选中选项目，True/False 列表框是否可编辑。 
        # items = ["Spring", "Summer", "Fall", "Winter"]
        # value, ok = QInputDialog.getItem(self, "输入框标题", "这是提示信息\n\n请选择季节:", items, 1, True)
        # print(value)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyWindow()
    win.show()
    sys.exit(app.exec_())

获取一下文件路径

import sys
from PyQt5.QtWidgets import *


class MyWindow(QWidget):

    def __init__(self):
        super().__init__()

        self.setWindowTitle('PyQt5 弹出窗口')
        self.resize(400, 300)
        # 加了self为全局布局，没加为局部布局
        h1 = QHBoxLayout(self)
        btn = QPushButton('弹出窗口')
        btn.clicked.connect(self.do_btn)
        h1.addWidget(btn)

    def do_btn(self, event):
        #dir_ = QFileDialog.getExistingDirectory(self, "选取文件夹", "E:/")  # 起始路径

        # # 设置文件扩展名过滤,注意用双分号间隔
        #打开一个文件（获取文件路径）
        file_, filetype = QFileDialog.getOpenFileName(self, "选取文件", "E:/", "All Files (*);;Text Files (*.dxf)")       
        print(file_)

        #保存文件
        #file_, ok = QFileDialog.getSaveFileName(self, "文件保存", "C:/", "All Files (*);;Text Files (*.txt)")

        # #另存文件
        # file_, ok = QFileDialog.getSaveFileName(self, "文件另存为", "C:/", "All Files (*);;Text Files (*.txt)")



if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = MyWindow()
    win.show()
    sys.exit(app.exec_())

UI做到这个程度，也就够用了。