def paintEvent(self, event):
contents_y = self.edit.verticalScrollBar().value()
page_bottom = contents_y + self.edit.viewport().height()
font_metrics = self.fontMetrics()
current_block = self.edit.document().findBlock(
self.edit.textCursor().position())
painter = QPainter(self)
painter.setPen(Qt.darkGray)
line_count = 0
first_pos = -1
posdiff = 0
# Iterate over all text blocks in the document.
block = self.edit.document().begin()
while block.isValid():
line_count += 1
# the top left position of the block in the document
if posdiff == 0:
position_y = self.edit.document().documentLayout(
).blockBoundingRect(block).topLeft().y()
if first_pos == -1:
first_pos = position_y
else:
posdiff = position_y - first_pos
else:
position_y += posdiff
# check if the position of the block is out side of visible area
if position_y > page_bottom:
break
# we want the line number for the selected line to be bold.
bold = False
if block == current_block:
bold = True
font = painter.font()
font.setBold(True)
painter.setFont(font)
painter.setPen(Qt.black)
# Draw the line number right justified at the y position of the
# line. 3 is the magic padding number. drawText(x, y, text)
painter.drawText(
self.width() - font_metrics.width(str(line_count)) - 3,
position_y - contents_y + font_metrics.ascent(),
str(line_count))
if bold:
font = painter.font()
font.setBold(False)
painter.setFont(font)
painter.setPen(Qt.darkGray)
block = block.next()
self.highest_line = line_count
painter.end()
QWidget.paintEvent(self, event)
def paintEvent(self, event):
painter = QPainter(self)
# Hello world
# ブラシ（塗りつぶし）の色を黒に
painter.setBrush(Qt.black)
# ペン（線描画）の色も黒に
painter.setPen(Qt.black)
# 背景を描く
# self.rect()はwidgetのサイズを返すので、widget全体を埋める四角形を描画する
# ペンとブラシの色が黒なので背景色は真っ黒
painter.drawRect(self.rect())
# ペン（線描画）の色を白にする
painter.setPen(Qt.white)
# フォントサイズを変更する
font = painter.font()
# つらさはできるだけ大きく表現したほうが良い
# 周りが気づくように
font.setPointSize(80)
painter.setFont(font)
# テキストを描画する
x = 0 # 左端
y = self.rect().height() * 0.5 # 上下の中心
painter.drawText(x, y, "TSU☆RA☆I")
def paintEvent(self, event):
contents_y = self.edit.verticalScrollBar().value()
page_bottom = contents_y + self.edit.viewport().height()
font_metrics = self.fontMetrics()
current_block = self.edit.document().findBlock(self.edit.textCursor().position())
painter = QPainter(self)
painter.setPen(Qt.darkGray)
line_count = 0
# Iterate over all text blocks in the document.
block = self.edit.document().begin()
while block.isValid():
line_count += 1
# the top left position of the block in the document
position = self.edit.document().documentLayout().blockBoundingRect(block).topLeft()
# check if the position of the block is out side of visible area
if position.y() > page_bottom:
break
# we want the line number for the selected line to be bold.
bold = False
if block == current_block:
bold = True
font = painter.font()
font.setBold(True)
painter.setFont(font)
painter.setPen(Qt.black)
# Draw the line number right justified at the y position of the
# line. 3 is the magic padding number. drawText(x, y, text)
painter.drawText(
self.width() - font_metrics.width(str(line_count)) - 3,
round(position.y()) - contents_y + font_metrics.ascent() + self.edit.document().documentMargin(),
str(line_count),
)
if bold:
font = painter.font()
font.setBold(False)
painter.setFont(font)
painter.setPen(Qt.darkGray)
block = block.next()
self.highest_line = line_count
painter.end()
QWidget.paintEvent(self, event)
