Python QPainter.drawLine方法代码示例

# 需要导入模块: from PyQt5.Qt import QPainter [as 别名]
# 或者: from PyQt5.Qt.QPainter import drawLine [as 别名]
    def paintEvent(self, ev):
        p = QPainter(self)
        p.setClipRect(ev.rect())
        palette = self.palette()
        p.setPen(palette.color(QPalette.WindowText))
        if not self.is_first:
            p.drawLine(0, 0, self.width(), 0)
        try:
            for row in self.rows:
                for cell in row:
                    p.save()
                    try:
                        cell.draw(p, self.width(), palette)
                    finally:
                        p.restore()

        finally:
            p.end()

# 需要导入模块: from PyQt5.Qt import QPainter [as 别名]
# 或者: from PyQt5.Qt.QPainter import drawLine [as 别名]
    def paint_line_numbers(self, ev):
        painter = QPainter(self.line_number_area)
        painter.fillRect(ev.rect(), self.line_number_palette.color(QPalette.Base))

        block = self.firstVisibleBlock()
        num = block.blockNumber()
        top = int(self.blockBoundingGeometry(block).translated(self.contentOffset()).top())
        bottom = top + int(self.blockBoundingRect(block).height())
        painter.setPen(self.line_number_palette.color(QPalette.Text))
        change_starts = {x[0] for x in self.changes}

        while block.isValid() and top <= ev.rect().bottom():
            r = ev.rect()
            if block.isVisible() and bottom >= r.top():
                text = unicode(self.line_number_map.get(num, ''))
                is_start = text != '-' and num in change_starts
                if is_start:
                    painter.save()
                    f = QFont(self.font())
                    f.setBold(True)
                    painter.setFont(f)
                    painter.setPen(self.line_number_palette.color(QPalette.BrightText))
                if text == '-':
                    painter.drawLine(r.left() + 2, (top + bottom)//2, r.right() - 2, (top + bottom)//2)
                else:
                    if self.right:
                        painter.drawText(r.left() + 3, top, r.right(), self.fontMetrics().height(),
                                Qt.AlignLeft, text)
                    else:
                        painter.drawText(r.left() + 2, top, r.right() - 5, self.fontMetrics().height(),
                                Qt.AlignRight, text)
                if is_start:
                    painter.restore()
            block = block.next()
            top = bottom
            bottom = top + int(self.blockBoundingRect(block).height())
            num += 1

# 需要导入模块: from PyQt5.Qt import QPainter [as 别名]
# 或者: from PyQt5.Qt.QPainter import drawLine [as 别名]
    def paintEvent(self, event):
        w = self.viewport().rect().width()
        painter = QPainter(self.viewport())
        painter.setClipRect(event.rect())
        floor = event.rect().bottom()
        ceiling = event.rect().top()
        fv = self.firstVisibleBlock().blockNumber()
        origin = self.contentOffset()
        doc = self.document()
        lines = []

        for num, text in self.headers:
            top, bot = num, num + 3
            if bot < fv:
                continue
            y_top = self.blockBoundingGeometry(doc.findBlockByNumber(top)).translated(origin).y()
            y_bot = self.blockBoundingGeometry(doc.findBlockByNumber(bot)).translated(origin).y()
            if max(y_top, y_bot) < ceiling:
                continue
            if min(y_top, y_bot) > floor:
                break
            painter.setFont(self.heading_font)
            br = painter.drawText(3, y_top, w, y_bot - y_top - 5, Qt.TextSingleLine, text)
            painter.setPen(QPen(self.palette().text(), 2))
            painter.drawLine(0, br.bottom()+3, w, br.bottom()+3)

        for top, bot, kind in self.changes:
            if bot < fv:
                continue
            y_top = self.blockBoundingGeometry(doc.findBlockByNumber(top)).translated(origin).y()
            y_bot = self.blockBoundingGeometry(doc.findBlockByNumber(bot)).translated(origin).y()
            if max(y_top, y_bot) < ceiling:
                continue
            if min(y_top, y_bot) > floor:
                break
            if y_top != y_bot:
                painter.fillRect(0,  y_top, w, y_bot - y_top, self.diff_backgrounds[kind])
            lines.append((y_top, y_bot, kind))
            if top in self.images:
                img, maxw = self.images[top][:2]
                if bot > top + 1 and not img.isNull():
                    y_top = self.blockBoundingGeometry(doc.findBlockByNumber(top+1)).translated(origin).y() + 3
                    y_bot -= 3
                    scaled, imgw, imgh = fit_image(img.width(), img.height(), w - 3, y_bot - y_top)
                    painter.setRenderHint(QPainter.SmoothPixmapTransform, True)
                    painter.drawPixmap(QRect(3, y_top, imgw, imgh), img)

        painter.end()
        PlainTextEdit.paintEvent(self, event)
        painter = QPainter(self.viewport())
        painter.setClipRect(event.rect())
        for top, bottom, kind in sorted(lines, key=lambda (t, b, k):{'replace':0}.get(k, 1)):
            painter.setPen(QPen(self.diff_foregrounds[kind], 1))
            painter.drawLine(0, top, w, top)
            painter.drawLine(0, bottom - 1, w, bottom - 1)