class CharacterWidget(QWidget):
characterSelected = pyqtSignal(str)
def __init__(self, parent=None):
super(CharacterWidget, self).__init__(parent)
self.displayFont = QFont()
self.squareSize = 24
self.columns = 16
self.lastKey = -1
self.setMouseTracking(True)
def updateFont(self, fontFamily):
self.displayFont.setFamily(fontFamily)
self.squareSize = max(24, QFontMetrics(self.displayFont).xHeight() * 3)
self.adjustSize()
self.update()
def updateSize(self, fontSize):
fontSize, _ = fontSize.toInt()
self.displayFont.setPointSize(fontSize)
self.squareSize = max(24, QFontMetrics(self.displayFont).xHeight() * 3)
self.adjustSize()
self.update()
def updateStyle(self, fontStyle):
fontDatabase = QFontDatabase()
oldStrategy = self.displayFont.styleStrategy()
self.displayFont = fontDatabase.font(self.displayFont.family(),
fontStyle,
self.displayFont.pointSize())
self.displayFont.setStyleStrategy(oldStrategy)
self.squareSize = max(24, QFontMetrics(self.displayFont).xHeight() * 3)
self.adjustSize()
self.update()
def updateFontMerging(self, enable):
if enable:
self.displayFont.setStyleStrategy(QFont.PreferDefault)
else:
self.displayFont.setStyleStrategy(QFont.NoFontMerging)
self.adjustSize()
self.update()
def sizeHint(self):
return QSize(self.columns * self.squareSize,
(65536 / self.columns) * self.squareSize)
def mouseMoveEvent(self, event):
widgetPosition = self.mapFromGlobal(event.globalPos())
key = (widgetPosition.y() // self.squareSize
) * self.columns + widgetPosition.x() // self.squareSize
text = '<p>Character: <span style="font-size: 24pt; font-family: %s">%s</span><p>Value: 0x%x' % (
self.displayFont.family(), self._chr(key), key)
QToolTip.showText(event.globalPos(), text, self)
def mousePressEvent(self, event):
if event.button() == Qt.LeftButton:
self.lastKey = (event.y() // self.squareSize
) * self.columns + event.x() // self.squareSize
key_ch = self._chr(self.lastKey)
if unicodedata.category(key_ch) != 'Cn':
self.characterSelected.emit(key_ch)
self.update()
else:
super(CharacterWidget, self).mousePressEvent(event)
def paintEvent(self, event):
painter = QPainter(self)
painter.fillRect(event.rect(), Qt.white)
painter.setFont(self.displayFont)
redrawRect = event.rect()
beginRow = redrawRect.top() // self.squareSize
endRow = redrawRect.bottom() // self.squareSize
beginColumn = redrawRect.left() // self.squareSize
endColumn = redrawRect.right() // self.squareSize
painter.setPen(Qt.gray)
for row in range(beginRow, endRow + 1):
for column in range(beginColumn, endColumn + 1):
painter.drawRect(column * self.squareSize,
row * self.squareSize, self.squareSize,
self.squareSize)
fontMetrics = QFontMetrics(self.displayFont)
painter.setPen(Qt.black)
for row in range(beginRow, endRow + 1):
for column in range(beginColumn, endColumn + 1):
key = row * self.columns + column
painter.setClipRect(column * self.squareSize,
row * self.squareSize, self.squareSize,
self.squareSize)
if key == self.lastKey:
painter.fillRect(column * self.squareSize + 1,
row * self.squareSize + 1,
self.squareSize, self.squareSize, Qt.red)
key_ch = self._chr(key)
painter.drawText(
column * self.squareSize + (self.squareSize / 2) -
fontMetrics.width(key_ch) / 2,
row * self.squareSize + 4 + fontMetrics.ascent(), key_ch)
@staticmethod
def _chr(codepoint):
try:
# Python v2.
return unichr(codepoint)
except NameError:
# Python v3.
return chr(codepoint)
class CharacterWidget(QWidget):
characterSelected = pyqtSignal(str)
def __init__(self, parent=None):
super(CharacterWidget, self).__init__(parent)
self.displayFont = QFont()
self.squareSize = 24
self.columns = 16
self.lastKey = -1
self.setMouseTracking(True)
def updateFont(self, fontFamily):
self.displayFont.setFamily(fontFamily)
self.squareSize = max(24, QFontMetrics(self.displayFont).xHeight() * 3)
self.adjustSize()
self.update()
def updateSize(self, fontSize):
fontSize, _ = fontSize.toInt()
self.displayFont.setPointSize(fontSize)
self.squareSize = max(24, QFontMetrics(self.displayFont).xHeight() * 3)
self.adjustSize()
self.update()
def updateStyle(self, fontStyle):
fontDatabase = QFontDatabase()
oldStrategy = self.displayFont.styleStrategy()
self.displayFont = fontDatabase.font(self.displayFont.family(),
fontStyle, self.displayFont.pointSize())
self.displayFont.setStyleStrategy(oldStrategy)
self.squareSize = max(24, QFontMetrics(self.displayFont).xHeight() * 3)
self.adjustSize()
self.update()
def updateFontMerging(self, enable):
if enable:
self.displayFont.setStyleStrategy(QFont.PreferDefault)
else:
self.displayFont.setStyleStrategy(QFont.NoFontMerging)
self.adjustSize()
self.update()
def sizeHint(self):
return QSize(self.columns * self.squareSize,
(65536 / self.columns) * self.squareSize)
def mouseMoveEvent(self, event):
widgetPosition = self.mapFromGlobal(event.globalPos())
key = (widgetPosition.y() // self.squareSize) * self.columns + widgetPosition.x() // self.squareSize
text = '<p>Character: <span style="font-size: 24pt; font-family: %s">%s</span><p>Value: 0x%x' % (self.displayFont.family(), self._chr(key), key)
QToolTip.showText(event.globalPos(), text, self)
def mousePressEvent(self, event):
if event.button() == Qt.LeftButton:
self.lastKey = (event.y() // self.squareSize) * self.columns + event.x() // self.squareSize
key_ch = self._chr(self.lastKey)
if unicodedata.category(key_ch) != 'Cn':
self.characterSelected.emit(key_ch)
self.update()
else:
super(CharacterWidget, self).mousePressEvent(event)
def paintEvent(self, event):
painter = QPainter(self)
painter.fillRect(event.rect(), Qt.white)
painter.setFont(self.displayFont)
redrawRect = event.rect()
beginRow = redrawRect.top() // self.squareSize
endRow = redrawRect.bottom() // self.squareSize
beginColumn = redrawRect.left() // self.squareSize
endColumn = redrawRect.right() // self.squareSize
painter.setPen(Qt.gray)
for row in range(beginRow, endRow + 1):
for column in range(beginColumn, endColumn + 1):
painter.drawRect(column * self.squareSize,
row * self.squareSize, self.squareSize,
self.squareSize)
fontMetrics = QFontMetrics(self.displayFont)
painter.setPen(Qt.black)
for row in range(beginRow, endRow + 1):
for column in range(beginColumn, endColumn + 1):
key = row * self.columns + column
painter.setClipRect(column * self.squareSize,
row * self.squareSize, self.squareSize,
self.squareSize)
if key == self.lastKey:
painter.fillRect(column * self.squareSize + 1,
row * self.squareSize + 1, self.squareSize,
self.squareSize, Qt.red)
key_ch = self._chr(key)
painter.drawText(column * self.squareSize + (self.squareSize / 2) - fontMetrics.width(key_ch) / 2,
row * self.squareSize + 4 + fontMetrics.ascent(),
key_ch)
@staticmethod
def _chr(codepoint):
try:
# Python v2.
return unichr(codepoint)
except NameError:
# Python v3.
return chr(codepoint)
