python3+PyQt5實(shí)現(xiàn)自定義窗口部件Counters
本文通過Python3+PyQt5實(shí)現(xiàn)自定義部件–Counters自定 窗口部件。這個(gè)窗口是3*3的網(wǎng)格。本文有兩個(gè)例子如下:
/home/yrd/eric_workspace/chap11/counters.py。
/home/yrd/eric_workspace/chap11/counters_dnd.py
第二個(gè)例子在第一個(gè)例子的基礎(chǔ)上實(shí)現(xiàn)能通過鼠標(biāo)拖拽球到不同的網(wǎng)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_()
運(yùn)行結(jié)果:
以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
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