python3+PyQt5 實現自定義窗口部件--Counters自定窗口部件

2019-11-08 02:32:41

字體：大中小

來源：轉載

供稿：網友

本文通過Python3+PyQt5實現自定義部件–Counters自定窗口部件。這個窗口是3*3的網格。本文有兩個例子如下： /home/yrd/eric_workspace/chap11/counters.py。 /home/yrd/eric_workspace/chap11/counters_dnd.py 第二個例子在第一個例子的基礎上實現能通過鼠標拖拽球到不同的網格中。

/home/yrd/eric_workspace/chap11/counters.py

#!/usr/bin/env python3from PyQt5.QtCore import (QRectF, QSize, Qt)from PyQt5.QtWidgets import (Qapplication, QSizePolicy,QWidget)from PyQt5.QtGui import QPainter,QPenBLANK, 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 python3from PyQt5.QtCore import (QRectF, QSize, Qt)from PyQt5.QtWidgets import (QApplication, QSizePolicy,QWidget)from PyQt5.QtGui import QPainter,QPen,QPixmap,QCursorBLANK, 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_()

運行結果：這里寫圖片描述