def paintEvent(self, event):
QFrame.paintEvent(self, event)
text = QDateTime.currentDateTime().toString(Qt.SystemLocaleLongDate)
logicalRect = QRectF(QPointF(0, 0), QSizeF(QFontMetrics(self.font()).size(Qt.TextSingleLine, text)))
physicalRect, frameWidth = QRectF(self.rect()), self.frameWidth()
physicalRect.adjust(frameWidth, frameWidth, -frameWidth, -frameWidth)
scaleForWidth = physicalRect.width() / logicalRect.width()
scaleForHeight = physicalRect.height() / logicalRect.height()
logicalRect.moveTo(frameWidth / scaleForWidth , frameWidth / scaleForHeight)
painter = QStylePainter(self)
painter.scale(scaleForWidth, scaleForHeight)
painter.drawText(logicalRect, Qt.AlignCenter, text)
def paintEvent(self, event):
QFrame.paintEvent(self, event)
text = QDateTime.currentDateTime().toString(Qt.SystemLocaleLongDate)
logicalRect = QRectF(
QPointF(0, 0),
QSizeF(QFontMetrics(self.font()).size(Qt.TextSingleLine, text)))
physicalRect, frameWidth = QRectF(self.rect()), self.frameWidth()
physicalRect.adjust(frameWidth, frameWidth, -frameWidth, -frameWidth)
scaleForWidth = physicalRect.width() / logicalRect.width()
scaleForHeight = physicalRect.height() / logicalRect.height()
logicalRect.moveTo(frameWidth / scaleForWidth,
frameWidth / scaleForHeight)
painter = QStylePainter(self)
painter.scale(scaleForWidth, scaleForHeight)
painter.drawText(logicalRect, Qt.AlignCenter, text)
class MainWindow(QWidget):
def __init__(self):
super(MainWindow, self).__init__()
# na pozici [0, 0] se šířkou 50px a výškou 50px
# musíme ho vykreslit my, protože je to pouze abstraktní objekt (abstrakní ve smyslu, že nám pouze uchovává data a poskytuje potřebné výpočty)
self.__drag_and_drop_rect = QRectF(QPointF(), QSizeF(50, 50))
self.__rect_color = QColor("red")
self.__mouse_pressed = False
def paintEvent(self, _):
"""
:type _: QPaintEvent
"""
painter = QPainter(self)
painter.setBrush(QBrush(self.__rect_color))
painter.setPen(QPen(self.__rect_color))
painter.drawRect(self.__drag_and_drop_rect)
def mousePressEvent(self, mouse_event):
"""
:type mouse_event: QMouseEvent
"""
# je v bod kliknutí v obdelníku?
self.__mouse_pressed = self.__drag_and_drop_rect.contains(mouse_event.pos())
def mouseReleaseEvent(self, _):
"""
:type _: QMouseEvent
"""
self.__mouse_pressed = False
def mouseMoveEvent(self, mouse_event):
"""
:type mouse_event: QMouseEvent
"""
if not self.__mouse_pressed:
return
# přesuň obdelník na pozici kurzoru
self.__drag_and_drop_rect.moveTo(mouse_event.pos())
# obnov okno(zavolá se metoda paintEvent)
self.update()
def paintEvent(self, event):
# TODO: Use QPainter.drawPixmapFragments on Qt 4.7
opt = QStyleOption()
opt.initFrom(self)
pixmap = self.__shadowPixmap
shadow_rect = QRectF(opt.rect)
widget_rect = QRectF(self.widget().geometry())
widget_rect.moveTo(self.radius_, self.radius_)
left = top = right = bottom = self.radius_
pixmap_rect = QRectF(QPointF(0, 0), QSizeF(pixmap.size()))
# Shadow casting rectangle in the source pixmap.
pixmap_shadow_rect = pixmap_rect.adjusted(left, top, -right, -bottom)
source_rects = self.__shadowPixmapFragments(pixmap_rect,
pixmap_shadow_rect)
target_rects = self.__shadowPixmapFragments(shadow_rect, widget_rect)
painter = QPainter(self)
for source, target in zip(source_rects, target_rects):
painter.drawPixmap(target, pixmap, source)
painter.end()
