# -*- coding: utf-8 -*-

"""
    【简介】
    不规则的，可以拖动的窗体实现例子
    
    
"""

import sys
from PySide6.QtWidgets import QApplication, QWidget
from PySide6.QtGui import QPixmap, QPainter, QCursor, QBitmap,QMouseEvent
from PySide6.QtCore import Qt
import os
os.chdir(os.path.dirname(__file__))

class ShapeWidget(QWidget):
    def __init__(self, parent=None):
        super(ShapeWidget, self).__init__(parent)
        self.setWindowTitle("不规则的，可以拖动的窗体实现例子")
        self.updatePix()

    # 显示不规则 pic
    def updatePix(self):
        # self.pix = QBitmap("./images/mask.png")
        self.pix = QBitmap("./images/mask2.png")
        self.resize(self.pix.size())
        self.setMask(self.pix)
        print(self.pix.size())
        self.dragPosition = None

    # 重定义鼠标按下响应函数mousePressEvent(QMouseEvent)和鼠标移动响应函数mouseMoveEvent(QMouseEvent)，使不规则窗体能响应鼠标事件，随意拖动。
    def mousePressEvent(self, event:QMouseEvent):
        if event.button() == Qt.LeftButton:
            self.m_drag = True
            self.m_DragPosition = event.globalPosition().toPoint() - self.pos()
            event.accept()
            self.setCursor(QCursor(Qt.OpenHandCursor))
        if event.button() == Qt.RightButton:
            self.close()

    def mouseMoveEvent(self, event:QMouseEvent):
        if Qt.LeftButton and self.m_drag:
            # 当左键移动窗体修改偏移值
            self.move(event.globalPosition().toPoint() - self.m_DragPosition)
            event.accept()

    def mouseReleaseEvent(self, event:QMouseEvent):
        self.m_drag = False
        self.setCursor(QCursor(Qt.ArrowCursor))

    # 一般 paintEvent 在窗体首次绘制加载， 要重新加载paintEvent 需要重新加载窗口使用 self.update() or  self.repaint()
    def paintEvent(self, event):
        painter = QPainter(self)
        painter.drawPixmap(0, 0, self.width(), self.height(), QPixmap("./images/boy.png"))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    form = ShapeWidget()
    form.show()
    app.exec()