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Zooming QtQuick Painted item using contents size
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| #!/usr/bin/env python3 | |
| from PyQt5.QtGui import QPainter | |
| from PyQt5.QtCore import * | |
| from PyQt5.QtQuick import * | |
| from PyQt5.QtWidgets import * | |
| class Item(QQuickPaintedItem): | |
| def __init__(self, useBoundRect, parent=None): | |
| super().__init__(parent) | |
| self._ubr = useBoundRect | |
| def getBoundRect(self): | |
| if self._ubr: | |
| return self.contentsBoundingRect() | |
| else: | |
| return QRectF(0, 0, self.width(), self.height()) | |
| def paint(self, painter): | |
| br = self.getBoundRect() | |
| font = painter.font() | |
| painter.drawText(br, Qt.TextWordWrap | Qt.AlignCenter, 'Hello, cruel world!') | |
| class Window(QMainWindow): | |
| def __init__(self, parent=None): | |
| super().__init__(parent) | |
| self._win = QQuickWindow() | |
| self._cont = QWidget.createWindowContainer(self._win) | |
| self._items = [] | |
| self.setCentralWidget(self._cont) | |
| self.resize(420, 400) | |
| def add_item(self, useBoundRect, x, y, w, h, ss, cw, ch, cs, col): | |
| root = self._win.contentItem() | |
| it = Item(useBoundRect, root) | |
| it.setX(x) | |
| it.setY(y) | |
| it.setScale(ss) | |
| it.setWidth(w) | |
| it.setHeight(h) | |
| it.setContentsScale(cs) | |
| it.setContentsSize(QSize(cw, ch)) | |
| it.setFillColor(col) | |
| self._items.append(it) | |
| return it | |
| if __name__ == '__main__': | |
| import sys | |
| app = QApplication(sys.argv) | |
| win = Window() | |
| win.show() | |
| # First and second rows: painting uses contentsBoundingRect() | |
| # First row: just use item's scale. Content is low-res, but scaled | |
| # BoRect, x y w h scale cw ch cscale, color | |
| win.add_item(True, 10, 10, 100, 50, 1, -1, -1, 1, Qt.green) | |
| win.add_item(True, 150, 20, 100, 50, 1.5, -1, -1, 1, Qt.yellow) | |
| win.add_item(True, 275, 10, 100, 50, 0.5, -1, -1, 1, Qt.yellow) | |
| # Second row: scale the contents instead of the item | |
| # BoRect, x y w h scale cw ch cscale, color | |
| win.add_item(True, 10, 100, 1, 1, 1, 100, 50, 1, Qt.red) | |
| win.add_item(True, 125, 100, 1, 1, 1, 100, 50, 1.5, Qt.magenta) | |
| win.add_item(True, 300, 100, 1, 1, 1, 50, 25, 0.5, Qt.magenta) | |
| # Third and fourth rows: painting uses width() and height() | |
| # Third row: scale the item, same result as before | |
| win.add_item(False, 10, 210, 100, 50, 1, -1, -1, 1, Qt.darkGreen) | |
| win.add_item(False, 150, 220, 100, 50, 1.5, -1, -1, 1, Qt.darkYellow) | |
| win.add_item(False, 275, 220, 100, 50, 0.5, -1, -1, 1, Qt.darkYellow) | |
| # Fourth row: scale the content | |
| win.add_item(False, 10, 300, 100, 50, 1, 100, 50, 1, Qt.darkRed) | |
| win.add_item(False, 125, 300, 100, 50, 1, 100, 50, 1.5, Qt.darkMagenta) | |
| win.add_item(False, 300, 300, 100, 50, 1, 50, 25, 0.5, Qt.darkMagenta) | |
| # BoRect, x y w h scale cw ch cscale, color | |
| sys.exit(app.exec_()) |
Revision 4 fixes a little bug for the 0.5 scales on rows 62 and 72 (contents size was wrong).
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Screenshot of 3rd revision:
https://drive.google.com/file/d/0B3kFbLpbTB6aZ0FWdjBBdEZKWE0/view?usp=sharing