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这篇文章将为大家详细讲解有关python3+PyQt5如何实现自定义窗口部件Counters,小编觉得挺实用的,因此分享给大家做个参考,希望大家阅读完这篇文章后可以有所收获。
成都创新互联专注为客户提供全方位的互联网综合服务,包含不限于网站设计制作、成都网站设计、岚皋网络推广、微信平台小程序开发、岚皋网络营销、岚皋企业策划、岚皋品牌公关、搜索引擎seo、人物专访、企业宣传片、企业代运营等,从售前售中售后,我们都将竭诚为您服务,您的肯定,是我们大的嘉奖;成都创新互联为所有大学生创业者提供岚皋建站搭建服务,24小时服务热线:18980820575,官方网址:www.cdcxhl.com本文有两个例子如下:
/home/yrd/eric_workspace/chap11/counters.py。
/home/yrd/eric_workspace/chap11/counters_dnd.py
第二个例子在第一个例子的基础上实现能通过鼠标拖拽球到不同的网格中。
/home/yrd/eric_workspace/chap11/counters.py
#!/usr/bin/env python3 from PyQt5.QtCore import (QRectF, QSize, Qt) from PyQt5.QtWidgets import (QApplication, QSizePolicy,QWidget) from PyQt5.QtGui import QPainter,QPen BLANK, RED, YELLOW = range(3) class CountersWidget(QWidget): def __init__(self, parent=None): super(CountersWidget, self).__init__(parent) self.setSizePolicy(QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)) self.grid = [[BLANK] * 3 for i in range(3)] self.selected = [0, 0] self.setMinimumSize(self.minimumSizeHint()) def sizeHint(self): return QSize(200, 200) def minimumSizeHint(self): return QSize(100, 100) def mousePressEvent(self, event): xOffset = self.width() / 3 yOffset = self.height() / 3 if event.x() < xOffset: x = 0 elif event.x() < 2 * xOffset: x = 1 else: x = 2 if event.y() < yOffset: y = 0 elif event.y() < 2 * yOffset: y = 1 else: y = 2 cell = self.grid[x][y] if cell == BLANK: cell = RED elif cell == RED: cell = YELLOW else: cell = BLANK self.grid[x][y] = cell self.selected = [x, y] self.update() def keyPressEvent(self, event): if event.key() == Qt.Key_Left: self.selected[0] = (2 if self.selected[0] == 0 else self.selected[0] - 1) elif event.key() == Qt.Key_Right: self.selected[0] = (0 if self.selected[0] == 2 else self.selected[0] + 1) elif event.key() == Qt.Key_Up: self.selected[1] = (2 if self.selected[1] == 0 else self.selected[1] - 1) elif event.key() == Qt.Key_Down: self.selected[1] = (0 if self.selected[1] == 2 else self.selected[1] + 1) elif event.key() == Qt.Key_Space: x, y = self.selected cell = self.grid[x][y] if cell == BLANK: cell = RED elif cell == RED: cell = YELLOW else: cell = BLANK self.grid[x][y] = cell self.update() def paintEvent(self, event=None): painter = QPainter(self) painter.setRenderHint(QPainter.Antialiasing, True) xOffset = self.width() / 3 yOffset = self.height() / 3 for x in range(3): for y in range(3): cell = self.grid[x][y] rect = (QRectF(x * xOffset, y * yOffset, xOffset, yOffset).adjusted(0.5, 0.5, -0.5, -0.5)) color = None if cell == RED: color = Qt.red elif cell == YELLOW: color = Qt.yellow if color is not None: painter.save() painter.setPen(Qt.black) painter.setBrush(color) painter.drawEllipse(rect.adjusted(2, 2, -2, -2)) painter.restore() if [x, y] == self.selected: painter.setPen(QPen(Qt.blue, 3)) else: painter.setPen(Qt.black) painter.drawRect(rect) if __name__ == "__main__": import sys app = QApplication(sys.argv) form = CountersWidget() form.setWindowTitle("Counters") form.show() app.exec_()
/home/yrd/eric_workspace/chap11/counters_dnd.py
#!/usr/bin/env python3 from PyQt5.QtCore import (QRectF, QSize, Qt) from PyQt5.QtWidgets import (QApplication, QSizePolicy,QWidget) from PyQt5.QtGui import QPainter,QPen,QPixmap,QCursor BLANK, RED, YELLOW = range(3) class CountersWidget(QWidget): def __init__(self, parent=None): super(CountersWidget, self).__init__(parent) self.setSizePolicy(QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)) self.grid = [[BLANK] * 3 for i in range(3)] self.selected = [0, 0] self.setMinimumSize(self.minimumSizeHint()) def sizeHint(self): return QSize(200, 200) def minimumSizeHint(self): return QSize(100, 100) def _xFromEventX(self, event): xOffset = self.width() / 3 if event.x() < xOffset: x = 0 elif event.x() < 2 * xOffset: x = 1 else: x = 2 return x def _yFromEventY(self, event): yOffset = self.width() / 3 if event.y() < yOffset: y = 0 elif event.y() < 2 * yOffset: y = 1 else: y = 2 return y def mouseDoubleClickEvent(self, event): x = self._xFromEventX(event) y = self._yFromEventY(event) cell = self.grid[x][y] if cell == BLANK: cell = RED elif cell == RED: cell = YELLOW else: cell = BLANK self.grid[x][y] = cell self.selected = [x, y] self.update() def keyPressEvent(self, event): if event.key() == Qt.Key_Left: self.selected[0] = (2 if self.selected[0] == 0 else self.selected[0] - 1) elif event.key() == Qt.Key_Right: self.selected[0] = (0 if self.selected[0] == 2 else self.selected[0] + 1) elif event.key() == Qt.Key_Up: self.selected[1] = (2 if self.selected[1] == 0 else self.selected[1] - 1) elif event.key() == Qt.Key_Down: self.selected[1] = (0 if self.selected[1] == 2 else self.selected[1] + 1) elif event.key() == Qt.Key_Space: x, y = self.selected cell = self.grid[x][y] if cell == BLANK: cell = RED elif cell == RED: cell = YELLOW else: cell = BLANK self.grid[x][y] = cell self.update() def paintEvent(self, event=None): painter = QPainter(self) painter.setRenderHint(QPainter.Antialiasing, True) xOffset = self.width() / 3 yOffset = self.height() / 3 for x in range(3): for y in range(3): cell = self.grid[x][y] rect = (QRectF(x * xOffset, y * yOffset, xOffset, yOffset).adjusted(0.5, 0.5, -0.5, -0.5)) color = None if cell == RED: color = Qt.red elif cell == YELLOW: color = Qt.yellow if color is not None: painter.save() painter.setPen(Qt.black) painter.setBrush(color) painter.drawEllipse(rect.adjusted(2, 2, -2, -2)) painter.restore() if [x, y] == self.selected: painter.setPen(QPen(Qt.blue, 3)) else: painter.setPen(Qt.black) painter.drawRect(rect) def mousePressEvent(self, event): self.x = self._xFromEventX(event) self.y = self._yFromEventY(event) cell = self.grid[self.x][self.y] color = Qt.darkGray if cell == RED: color = Qt.red elif cell == YELLOW: color = Qt.yellow pixmap = QPixmap(12, 12) pixmap.fill(color) self.setCursor(QCursor(pixmap)) def mouseReleaseEvent(self, event): x = self._xFromEventX(event) y = self._yFromEventY(event) if self.x != x or self.y != y: cell = self.grid[self.x][self.y] self.grid[self.x][self.y] = BLANK self.grid[x][y] = cell self.selected = [x, y] self.update() self.setCursor(Qt.ArrowCursor) if __name__ == "__main__": import sys app = QApplication(sys.argv) form = CountersWidget() form.setWindowTitle("Counters") form.show() app.exec_()
运行结果:
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