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Merge pull request #24 from nucleic/bitmap-buttons
Bitmap buttons
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| #------------------------------------------------------------------------------ | ||
| # Copyright (c) 2013, Nucleic Development Team. | ||
| # | ||
| # Distributed under the terms of the Modified BSD License. | ||
| # | ||
| # The full license is in the file COPYING.txt, distributed with this software. | ||
| #------------------------------------------------------------------------------ | ||
| from PyQt4.QtCore import QPoint, QRect | ||
| from PyQt4.QtGui import QAbstractButton, QColor, QPainter, QStyle, QStyleOption | ||
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| class QBitmapButton(QAbstractButton): | ||
| """ A button widget which renders a bitmap. | ||
| This class is used to render the various maximize, restore, and | ||
| close buttons in the docking framework. Bitmap images are chosen | ||
| for rendering so that the button can be fully styled using Qt | ||
| style sheets. | ||
| """ | ||
| _bitmap = None | ||
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| def bitmap(self): | ||
| """ Get the bitmap associated with the button. | ||
| """ | ||
| return self._bitmap | ||
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| def setBitmap(self, bitmap): | ||
| """ Set the bitmap associate with the button. | ||
| """ | ||
| self._bitmap = bitmap | ||
| self.update() | ||
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| def sizeHint(self): | ||
| """ Get the size hint for the bitmap button. | ||
| The size hint of the button is equal to it's icon size. | ||
| """ | ||
| return self.minimumSizeHint() | ||
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| def minimumSizeHint(self): | ||
| """ Get the minimum size hint for the bitmap button. | ||
| The minimum size hint of the button is equal to it's icon size. | ||
| """ | ||
| return self.iconSize() | ||
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| def enterEvent(self, event): | ||
| """ Handle the enter event for the button. | ||
| """ | ||
| if self.isEnabled(): | ||
| self.update() | ||
| super(QBitmapButton, self).enterEvent(event) | ||
|
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| def leaveEvent(self, event): | ||
| """ Handle the leave event for the button. | ||
| """ | ||
| if self.isEnabled(): | ||
| self.update() | ||
| super(QBitmapButton, self).leaveEvent(event) | ||
|
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| def styleOption(self): | ||
| """ Get a filled style option for the button. | ||
| Returns | ||
| ------- | ||
| result : QStyleOption | ||
| A style option initialized for the current button state. | ||
| """ | ||
| opt = QStyleOption() | ||
| opt.initFrom(self) | ||
| opt.state |= QStyle.State_AutoRaise | ||
| is_down = self.isDown() | ||
| is_enabled = self.isEnabled() | ||
| is_checked = self.isChecked() | ||
| under_mouse = self.underMouse() | ||
| if is_enabled and under_mouse and not is_checked and not is_down: | ||
| opt.state |= QStyle.State_Raised | ||
| if is_checked: | ||
| opt.state |= QStyle.State_On | ||
| if is_down: | ||
| opt.state |= QStyle.State_Sunken | ||
| return opt | ||
|
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| def drawBitmap(self, opt, painter): | ||
| """ Draw the bitmap for the button. | ||
| The bitmap will be drawn with the foreground color set by | ||
| the style sheet and the style option. | ||
| Parameters | ||
| ---------- | ||
| opt : QStyleOption | ||
| The style option to use for drawing. | ||
| painter : QPainter | ||
| The painter to use for drawing. | ||
| """ | ||
| bmp = self._bitmap | ||
| if bmp is not None: | ||
| # hack to get the current stylesheet foreground color | ||
| hint = QStyle.SH_GroupBox_TextLabelColor | ||
| fg = self.style().styleHint(hint, opt, self) | ||
| # mask signed to unsigned which 'fromRgba' requires | ||
| painter.setPen(QColor.fromRgba(0xffffffff & fg)) | ||
| size = self.size() | ||
| im_size = bmp.size() | ||
| x = size.width() / 2 - im_size.width() / 2 | ||
| y = size.height() / 2 - im_size.height() / 2 | ||
| source = QRect(QPoint(0, 0), im_size) | ||
| dest = QRect(QPoint(x, y), im_size) | ||
| painter.drawPixmap(dest, bmp, source) | ||
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| def paintEvent(self, event): | ||
| """ Handle the paint event for the button. | ||
| """ | ||
| painter = QPainter(self) | ||
| opt = self.styleOption() | ||
| self.style().drawPrimitive(QStyle.PE_Widget, opt, painter, self) | ||
| self.drawBitmap(opt, painter) |
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