class ScalableDial(QDial):
# enum CustomPaintMode
CUSTOM_PAINT_MODE_NULL = 0 # default (NOTE: only this mode has label gradient)
CUSTOM_PAINT_MODE_CARLA_WET = 1 # color blue-green gradient (reserved #3)
CUSTOM_PAINT_MODE_CARLA_VOL = 2 # color blue (reserved #3)
CUSTOM_PAINT_MODE_CARLA_L = 3 # color yellow (reserved #4)
CUSTOM_PAINT_MODE_CARLA_R = 4 # color yellow (reserved #4)
CUSTOM_PAINT_MODE_CARLA_PAN = 5 # color yellow (reserved #3)
CUSTOM_PAINT_MODE_COLOR = 6 # color, selectable (reserved #3)
CUSTOM_PAINT_MODE_ZITA = 7 # custom zita knob (reserved #6)
CUSTOM_PAINT_MODE_NO_GRADIENT = 8 # skip label gradient
# enum Orientation
HORIZONTAL = 0
VERTICAL = 1
HOVER_MIN = 0
HOVER_MAX = 9
MODE_DEFAULT = 0
MODE_LINEAR = 1
# signals
dragStateChanged = pyqtSignal(bool)
realValueChanged = pyqtSignal(float)
def __init__(self, parent, index=0):
QDial.__init__(self, parent)
self.fDialMode = self.MODE_LINEAR
self.fMinimum = 0.0
self.fMaximum = 1.0
self.fRealValue = 0.0
self.fPrecision = 10000
self.fIsInteger = False
self.fIsHovered = False
self.fIsPressed = False
self.fHoverStep = self.HOVER_MIN
self.fLastDragPos = None
self.fLastDragValue = 0.0
self.fIndex = index
self.fImage = QSvgWidget(":/scalable/dial_03.svg")
self.fImageNum = "01"
if self.fImage.sizeHint().width() > self.fImage.sizeHint().height():
self.fImageOrientation = self.HORIZONTAL
else:
self.fImageOrientation = self.VERTICAL
self.fLabel = ""
self.fLabelPos = QPointF(0.0, 0.0)
self.fLabelFont = QFont(self.font())
self.fLabelFont.setPixelSize(8)
self.fLabelWidth = 0
self.fLabelHeight = 0
if self.palette().window().color().lightness() > 100:
# Light background
c = self.palette().dark().color()
self.fLabelGradientColor1 = c
self.fLabelGradientColor2 = QColor(c.red(), c.green(), c.blue(), 0)
self.fLabelGradientColorT = [
self.palette().buttonText().color(),
self.palette().mid().color()
]
else:
# Dark background
self.fLabelGradientColor1 = QColor(0, 0, 0, 255)
self.fLabelGradientColor2 = QColor(0, 0, 0, 0)
self.fLabelGradientColorT = [Qt.white, Qt.darkGray]
self.fLabelGradient = QLinearGradient(0, 0, 0, 1)
self.fLabelGradient.setColorAt(0.0, self.fLabelGradientColor1)
self.fLabelGradient.setColorAt(0.6, self.fLabelGradientColor1)
self.fLabelGradient.setColorAt(1.0, self.fLabelGradientColor2)
self.fLabelGradientRect = QRectF(0.0, 0.0, 0.0, 0.0)
self.fCustomPaintMode = self.CUSTOM_PAINT_MODE_NULL
self.fCustomPaintColor = QColor(0xff, 0xff, 0xff)
self.updateSizes()
# Fake internal value, custom precision
QDial.setMinimum(self, 0)
QDial.setMaximum(self, self.fPrecision)
QDial.setValue(self, 0)
self.valueChanged.connect(self.slot_valueChanged)
def getIndex(self):
return self.fIndex
def getBaseSize(self):
return self.fImageBaseSize
def forceWhiteLabelGradientText(self):
self.fLabelGradientColor1 = QColor(0, 0, 0, 255)
self.fLabelGradientColor2 = QColor(0, 0, 0, 0)
self.fLabelGradientColorT = [Qt.white, Qt.darkGray]
def setLabelColor(self, enabled, disabled):
self.fLabelGradientColor1 = QColor(0, 0, 0, 255)
self.fLabelGradientColor2 = QColor(0, 0, 0, 0)
self.fLabelGradientColorT = [enabled, disabled]
def updateSizes(self):
if isinstance(self.fImage, QPixmap):
self.fImageWidth = self.fImage.width()
self.fImageHeight = self.fImage.height()
else:
self.fImageWidth = self.fImage.sizeHint().width()
self.fImageHeight = self.fImage.sizeHint().height()
if self.fImageWidth < 1:
self.fImageWidth = 1
if self.fImageHeight < 1:
self.fImageHeight = 1
if self.fImageOrientation == self.HORIZONTAL:
self.fImageBaseSize = self.fImageHeight
self.fImageLayersCount = self.fImageWidth / self.fImageHeight
else:
self.fImageBaseSize = self.fImageWidth
self.fImageLayersCount = self.fImageHeight / self.fImageWidth
self.setMinimumSize(self.fImageBaseSize,
self.fImageBaseSize + self.fLabelHeight + 5)
self.setMaximumSize(self.fImageBaseSize,
self.fImageBaseSize + self.fLabelHeight + 5)
if not self.fLabel:
self.fLabelHeight = 0
self.fLabelWidth = 0
return
self.fLabelWidth = QFontMetrics(self.fLabelFont).width(self.fLabel)
self.fLabelHeight = QFontMetrics(self.fLabelFont).height()
self.fLabelPos.setX(
float(self.fImageBaseSize) / 2.0 - float(self.fLabelWidth) / 2.0)
if self.fImageNum in ("01", "02", "07", "08", "09", "10"):
self.fLabelPos.setY(self.fImageBaseSize + self.fLabelHeight)
elif self.fImageNum in ("11", ):
self.fLabelPos.setY(self.fImageBaseSize +
self.fLabelHeight * 2 / 3)
else:
self.fLabelPos.setY(self.fImageBaseSize + self.fLabelHeight / 2)
self.fLabelGradient.setStart(0, float(self.fImageBaseSize) / 2.0)
self.fLabelGradient.setFinalStop(
0, self.fImageBaseSize + self.fLabelHeight + 5)
self.fLabelGradientRect = QRectF(
float(self.fImageBaseSize) / 8.0,
float(self.fImageBaseSize) / 2.0,
float(self.fImageBaseSize * 3) / 4.0,
self.fImageBaseSize + self.fLabelHeight + 5)
def setCustomPaintMode(self, paintMode):
if self.fCustomPaintMode == paintMode:
return
self.fCustomPaintMode = paintMode
self.update()
def setCustomPaintColor(self, color):
if self.fCustomPaintColor == color:
return
self.fCustomPaintColor = color
self.update()
def setLabel(self, label):
if self.fLabel == label:
return
self.fLabel = label
self.updateSizes()
self.update()
def setIndex(self, index):
self.fIndex = index
def setImage(self, imageId):
self.fImageNum = "%02i" % imageId
if imageId in (2, 6, 7, 8, 9, 10, 11, 12, 13):
img = ":/bitmaps/dial_%s%s.png" % (self.fImageNum,
"" if self.isEnabled() else "d")
else:
img = ":/scalable/dial_%s%s.svg" % (self.fImageNum, ""
if self.isEnabled() else "d")
if img.endswith(".png"):
if not isinstance(self.fImage, QPixmap):
self.fImage = QPixmap()
else:
if not isinstance(self.fImage, QSvgWidget):
self.fImage = QSvgWidget()
self.fImage.load(img)
if self.fImage.width() > self.fImage.height():
self.fImageOrientation = self.HORIZONTAL
else:
self.fImageOrientation = self.VERTICAL
# special svgs
if self.fCustomPaintMode == self.CUSTOM_PAINT_MODE_NULL:
# reserved for carla-wet, carla-vol, carla-pan and color
if self.fImageNum == "03":
self.fCustomPaintMode = self.CUSTOM_PAINT_MODE_COLOR
# reserved for carla-L and carla-R
elif self.fImageNum == "04":
self.fCustomPaintMode = self.CUSTOM_PAINT_MODE_CARLA_L
# reserved for zita
elif self.fImageNum == "06":
self.fCustomPaintMode = self.CUSTOM_PAINT_MODE_ZITA
self.updateSizes()
self.update()
def setPrecision(self, value, isInteger):
self.fPrecision = value
self.fIsInteger = isInteger
QDial.setMaximum(self, value)
def setMinimum(self, value):
self.fMinimum = value
def setMaximum(self, value):
self.fMaximum = value
def rvalue(self):
return self.fRealValue
def setValue(self, value, emitSignal=False):
if self.fRealValue == value or isnan(value):
return
if value <= self.fMinimum:
qtValue = 0
self.fRealValue = self.fMinimum
elif value >= self.fMaximum:
qtValue = self.fPrecision
self.fRealValue = self.fMaximum
else:
qtValue = round(
float(value - self.fMinimum) /
float(self.fMaximum - self.fMinimum) * self.fPrecision)
self.fRealValue = value
# Block change signal, we'll handle it ourselves
self.blockSignals(True)
QDial.setValue(self, qtValue)
self.blockSignals(False)
if emitSignal:
self.realValueChanged.emit(self.fRealValue)
@pyqtSlot(int)
def slot_valueChanged(self, value):
self.fRealValue = float(value) / self.fPrecision * (
self.fMaximum - self.fMinimum) + self.fMinimum
self.realValueChanged.emit(self.fRealValue)
@pyqtSlot()
def slot_updateImage(self):
self.setImage(int(self.fImageNum))
def minimumSizeHint(self):
return QSize(self.fImageBaseSize, self.fImageBaseSize)
def sizeHint(self):
return QSize(self.fImageBaseSize, self.fImageBaseSize)
def changeEvent(self, event):
QDial.changeEvent(self, event)
# Force svg update if enabled state changes
if event.type() == QEvent.EnabledChange:
self.slot_updateImage()
def enterEvent(self, event):
self.fIsHovered = True
if self.fHoverStep == self.HOVER_MIN:
self.fHoverStep = self.HOVER_MIN + 1
QDial.enterEvent(self, event)
def leaveEvent(self, event):
self.fIsHovered = False
if self.fHoverStep == self.HOVER_MAX:
self.fHoverStep = self.HOVER_MAX - 1
QDial.leaveEvent(self, event)
def mousePressEvent(self, event):
if self.fDialMode == self.MODE_DEFAULT:
return QDial.mousePressEvent(self, event)
if event.button() == Qt.LeftButton:
self.fIsPressed = True
self.fLastDragPos = event.pos()
self.fLastDragValue = self.fRealValue
self.dragStateChanged.emit(True)
def mouseMoveEvent(self, event):
if self.fDialMode == self.MODE_DEFAULT:
return QDial.mouseMoveEvent(self, event)
if not self.fIsPressed:
return
range = (self.fMaximum - self.fMinimum) / 4.0
pos = event.pos()
dx = range * float(pos.x() - self.fLastDragPos.x()) / self.width()
dy = range * float(pos.y() - self.fLastDragPos.y()) / self.height()
value = self.fLastDragValue + dx - dy
if value < self.fMinimum:
value = self.fMinimum
elif value > self.fMaximum:
value = self.fMaximum
elif self.fIsInteger:
value = float(round(value))
self.setValue(value, True)
def mouseReleaseEvent(self, event):
if self.fDialMode == self.MODE_DEFAULT:
return QDial.mouseReleaseEvent(self, event)
if self.fIsPressed:
self.fIsPressed = False
self.dragStateChanged.emit(False)
def paintEvent(self, event):
painter = QPainter(self)
event.accept()
painter.save()
painter.setRenderHint(QPainter.Antialiasing, True)
if self.fLabel:
if self.fCustomPaintMode == self.CUSTOM_PAINT_MODE_NULL:
painter.setPen(self.fLabelGradientColor2)
painter.setBrush(self.fLabelGradient)
painter.drawRect(self.fLabelGradientRect)
painter.setFont(self.fLabelFont)
painter.setPen(
self.fLabelGradientColorT[0 if self.isEnabled() else 1])
painter.drawText(self.fLabelPos, self.fLabel)
if self.isEnabled():
normValue = float(self.fRealValue -
self.fMinimum) / float(self.fMaximum -
self.fMinimum)
curLayer = int((self.fImageLayersCount - 1) * normValue)
if self.fImageOrientation == self.HORIZONTAL:
xpos = self.fImageBaseSize * curLayer
ypos = 0.0
else:
xpos = 0.0
ypos = self.fImageBaseSize * curLayer
source = QRectF(xpos, ypos, self.fImageBaseSize,
self.fImageBaseSize)
if isinstance(self.fImage, QPixmap):
target = QRectF(0.0, 0.0, self.fImageBaseSize,
self.fImageBaseSize)
painter.drawPixmap(target, self.fImage, source)
else:
self.fImage.renderer().render(painter, source)
# Custom knobs (Dry/Wet and Volume)
if self.fCustomPaintMode in (self.CUSTOM_PAINT_MODE_CARLA_WET,
self.CUSTOM_PAINT_MODE_CARLA_VOL):
# knob color
colorGreen = QColor(0x5D, 0xE7,
0x3D).lighter(100 + self.fHoverStep * 6)
colorBlue = QColor(0x3E, 0xB8,
0xBE).lighter(100 + self.fHoverStep * 6)
# draw small circle
ballRect = QRectF(8.0, 8.0, 15.0, 15.0)
ballPath = QPainterPath()
ballPath.addEllipse(ballRect)
#painter.drawRect(ballRect)
tmpValue = (0.375 + 0.75 * normValue)
ballValue = tmpValue - floor(tmpValue)
ballPoint = ballPath.pointAtPercent(ballValue)
# draw arc
startAngle = 218 * 16
spanAngle = -255 * 16 * normValue
if self.fCustomPaintMode == self.CUSTOM_PAINT_MODE_CARLA_WET:
painter.setBrush(colorBlue)
painter.setPen(QPen(colorBlue, 0))
painter.drawEllipse(
QRectF(ballPoint.x(), ballPoint.y(), 2.2, 2.2))
gradient = QConicalGradient(15.5, 15.5, -45)
gradient.setColorAt(0.0, colorBlue)
gradient.setColorAt(0.125, colorBlue)
gradient.setColorAt(0.625, colorGreen)
gradient.setColorAt(0.75, colorGreen)
gradient.setColorAt(0.76, colorGreen)
gradient.setColorAt(1.0, colorGreen)
painter.setBrush(gradient)
painter.setPen(QPen(gradient, 3))
else:
painter.setBrush(colorBlue)
painter.setPen(QPen(colorBlue, 0))
painter.drawEllipse(
QRectF(ballPoint.x(), ballPoint.y(), 2.2, 2.2))
painter.setBrush(colorBlue)
painter.setPen(QPen(colorBlue, 3))
painter.drawArc(4.0, 4.0, 26.0, 26.0, startAngle, spanAngle)
# Custom knobs (L and R)
elif self.fCustomPaintMode in (self.CUSTOM_PAINT_MODE_CARLA_L,
self.CUSTOM_PAINT_MODE_CARLA_R):
# knob color
color = QColor(0xAD, 0xD5,
0x48).lighter(100 + self.fHoverStep * 6)
# draw small circle
ballRect = QRectF(7.0, 8.0, 11.0, 12.0)
ballPath = QPainterPath()
ballPath.addEllipse(ballRect)
#painter.drawRect(ballRect)
tmpValue = (0.375 + 0.75 * normValue)
ballValue = tmpValue - floor(tmpValue)
ballPoint = ballPath.pointAtPercent(ballValue)
painter.setBrush(color)
painter.setPen(QPen(color, 0))
painter.drawEllipse(
QRectF(ballPoint.x(), ballPoint.y(), 2.0, 2.0))
# draw arc
if self.fCustomPaintMode == self.CUSTOM_PAINT_MODE_CARLA_L:
startAngle = 218 * 16
spanAngle = -255 * 16 * normValue
else:
startAngle = 322.0 * 16
spanAngle = 255.0 * 16 * (1.0 - normValue)
painter.setPen(QPen(color, 2.5))
painter.drawArc(3.5, 3.5, 22.0, 22.0, startAngle, spanAngle)
# Custom knobs (Color)
elif self.fCustomPaintMode == self.CUSTOM_PAINT_MODE_COLOR:
# knob color
color = self.fCustomPaintColor.lighter(100 +
self.fHoverStep * 6)
# draw small circle
ballRect = QRectF(8.0, 8.0, 15.0, 15.0)
ballPath = QPainterPath()
ballPath.addEllipse(ballRect)
tmpValue = (0.375 + 0.75 * normValue)
ballValue = tmpValue - floor(tmpValue)
ballPoint = ballPath.pointAtPercent(ballValue)
# draw arc
startAngle = 218 * 16
spanAngle = -255 * 16 * normValue
painter.setBrush(color)
painter.setPen(QPen(color, 0))
painter.drawEllipse(
QRectF(ballPoint.x(), ballPoint.y(), 2.2, 2.2))
painter.setBrush(color)
painter.setPen(QPen(color, 3))
painter.drawArc(4.0, 4.8, 26.0, 26.0, startAngle, spanAngle)
# Custom knobs (Zita)
elif self.fCustomPaintMode == self.CUSTOM_PAINT_MODE_ZITA:
a = normValue * pi * 1.5 - 2.35
r = 10.0
x = 10.5
y = 10.5
x += r * sin(a)
y -= r * cos(a)
painter.setBrush(Qt.black)
painter.setPen(QPen(Qt.black, 2))
painter.drawLine(QPointF(11.0, 11.0), QPointF(x, y))
# Custom knobs
else:
painter.restore()
return
if self.HOVER_MIN < self.fHoverStep < self.HOVER_MAX:
self.fHoverStep += 1 if self.fIsHovered else -1
QTimer.singleShot(20, self.update)
else: # isEnabled()
target = QRectF(0.0, 0.0, self.fImageBaseSize, self.fImageBaseSize)
if isinstance(self.fImage, QPixmap):
painter.drawPixmap(target, self.fImage, target)
else:
self.fImage.renderer().render(painter, target)
painter.restore()
def resizeEvent(self, event):
QDial.resizeEvent(self, event)
self.updateSizes()
class SvgDiagram(E5MainWindow):
"""
Class implementing a dialog showing a SVG graphic.
"""
ZoomLevels = [
1, 3, 5, 7, 9,
10, 20, 30, 50, 67, 80, 90,
100,
110, 120, 133, 150, 170, 200, 240, 300, 400,
500, 600, 700, 800, 900, 1000,
]
ZoomLevelDefault = 100
def __init__(self, svgFile, parent=None, name=None):
"""
Constructor
@param svgFile filename of a SVG graphics file to show (string)
@param parent parent widget of the view (QWidget)
@param name name of the view widget (string)
"""
super(SvgDiagram, self).__init__(parent)
if name:
self.setObjectName(name)
else:
self.setObjectName("SvgDiagram")
self.setWindowTitle(self.tr("SVG-Viewer"))
self.svgWidget = QSvgWidget()
self.svgWidget.setObjectName("svgWidget")
self.svgWidget.setBackgroundRole(QPalette.Base)
self.svgWidget.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)
self.svgView = QScrollArea()
self.svgView.setObjectName("svgView")
self.svgView.setBackgroundRole(QPalette.Dark)
self.svgView.setWidget(self.svgWidget)
self.setCentralWidget(self.svgView)
self.__zoomWidget = E5ZoomWidget(
UI.PixmapCache.getPixmap("zoomOut.png"),
UI.PixmapCache.getPixmap("zoomIn.png"),
UI.PixmapCache.getPixmap("zoomReset.png"), self)
self.statusBar().addPermanentWidget(self.__zoomWidget)
self.__zoomWidget.setMapping(
SvgDiagram.ZoomLevels, SvgDiagram.ZoomLevelDefault)
self.__zoomWidget.valueChanged.connect(self.__doZoom)
# polish up the dialog
self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint()))
self.zoom = 1.0
self.svgFile = svgFile
self.svgWidget.load(self.svgFile)
self.svgWidget.resize(self.svgWidget.renderer().defaultSize())
self.__initActions()
self.__initContextMenu()
self.__initToolBars()
self.grabGesture(Qt.PinchGesture)
def __initActions(self):
"""
Private method to initialize the view actions.
"""
self.closeAct = \
QAction(UI.PixmapCache.getIcon("close.png"),
self.tr("Close"), self)
self.closeAct.triggered.connect(self.close)
self.printAct = \
QAction(UI.PixmapCache.getIcon("print.png"),
self.tr("Print"), self)
self.printAct.triggered.connect(self.__printDiagram)
self.printPreviewAct = \
QAction(UI.PixmapCache.getIcon("printPreview.png"),
self.tr("Print Preview"), self)
self.printPreviewAct.triggered.connect(self.__printPreviewDiagram)
def __initContextMenu(self):
"""
Private method to initialize the context menu.
"""
self.__menu = QMenu(self)
self.__menu.addAction(self.closeAct)
self.__menu.addSeparator()
self.__menu.addAction(self.printPreviewAct)
self.__menu.addAction(self.printAct)
self.setContextMenuPolicy(Qt.CustomContextMenu)
self.customContextMenuRequested.connect(self.__showContextMenu)
def __showContextMenu(self, coord):
"""
Private slot to show the context menu of the listview.
@param coord the position of the mouse pointer (QPoint)
"""
self.__menu.popup(self.mapToGlobal(coord))
def __initToolBars(self):
"""
Private method to populate the toolbars with our actions.
"""
self.windowToolBar = QToolBar(self.tr("Window"), self)
self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize)
self.windowToolBar.addAction(self.closeAct)
self.graphicsToolBar = QToolBar(self.tr("Graphics"), self)
self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize)
self.graphicsToolBar.addAction(self.printPreviewAct)
self.graphicsToolBar.addAction(self.printAct)
self.addToolBar(Qt.TopToolBarArea, self.windowToolBar)
self.addToolBar(Qt.TopToolBarArea, self.graphicsToolBar)
def getDiagramName(self):
"""
Public method to retrieve a name for the diagram.
@return name for the diagram
"""
return self.svgFile
def wheelEvent(self, evt):
"""
Protected method to handle wheel events.
@param evt reference to the wheel event (QWheelEvent)
"""
if evt.modifiers() & Qt.ControlModifier:
if qVersion() >= "5.0.0":
delta = evt.angleDelta().y()
else:
delta = evt.delta()
if delta < 0:
self.__zoomOut()
else:
self.__zoomIn()
evt.accept()
return
super(SvgDiagram, self).wheelEvent(evt)
def event(self, evt):
"""
Public method handling events.
@param evt reference to the event (QEvent)
@return flag indicating, if the event was handled (boolean)
"""
if evt.type() == QEvent.Gesture:
self.gestureEvent(evt)
return True
return super(SvgDiagram, self).event(evt)
def gestureEvent(self, evt):
"""
Protected method handling gesture events.
@param evt reference to the gesture event (QGestureEvent
"""
pinch = evt.gesture(Qt.PinchGesture)
if pinch:
if pinch.state() == Qt.GestureStarted:
pinch.setScaleFactor(self.__zoom() / 100)
else:
self.__doZoom(int(pinch.scaleFactor() * 100))
evt.accept()
###########################################################################
## Private menu handling methods below.
###########################################################################
def __adjustScrollBar(self, scrollBar, factor):
"""
Private method to adjust a scrollbar by a certain factor.
@param scrollBar reference to the scrollbar object (QScrollBar)
@param factor factor to adjust by (float)
"""
scrollBar.setValue(
int(factor * scrollBar.value() +
((factor - 1) * scrollBar.pageStep() / 2)))
def __levelForZoom(self, zoom):
"""
Private method determining the zoom level index given a zoom factor.
@param zoom zoom factor (integer)
@return index of zoom factor (integer)
"""
try:
index = SvgDiagram.ZoomLevels.index(zoom)
except ValueError:
for index in range(len(SvgDiagram.ZoomLevels)):
if zoom <= SvgDiagram.ZoomLevels[index]:
break
return index
def __doZoom(self, value):
"""
Private method to set the zoom value in percent.
@param value zoom value in percent (integer)
"""
oldValue = self.__zoom()
if value != oldValue:
self.svgWidget.resize(value / 100 * self.svgWidget.sizeHint())
factor = value / oldValue
self.__adjustScrollBar(self.svgView.horizontalScrollBar(), factor)
self.__adjustScrollBar(self.svgView.verticalScrollBar(), factor)
self.__zoomWidget.setValue(value)
def __zoomIn(self):
"""
Private method to zoom into the SVG.
"""
index = self.__levelForZoom(self.__zoom())
if index < len(SvgDiagram.ZoomLevels) - 1:
self.__doZoom(SvgDiagram.ZoomLevels[index + 1])
def __zoomOut(self):
"""
Private method to zoom out of the SVG.
"""
index = self.__levelForZoom(self.__zoom())
if index > 0:
self.__doZoom(SvgDiagram.ZoomLevels[index - 1])
def __zoomReset(self):
"""
Private method to reset the zoom value.
"""
self.__doZoom(SvgDiagram.ZoomLevels[SvgDiagram.ZoomLevelDefault])
def __zoom(self):
"""
Private method to get the current zoom factor in percent.
@return current zoom factor in percent (integer)
"""
return int(self.svgWidget.width() /
self.svgWidget.sizeHint().width() * 100.0)
def __printDiagram(self):
"""
Private slot called to print the diagram.
"""
printer = QPrinter(mode=QPrinter.ScreenResolution)
printer.setFullPage(True)
if Preferences.getPrinter("ColorMode"):
printer.setColorMode(QPrinter.Color)
else:
printer.setColorMode(QPrinter.GrayScale)
if Preferences.getPrinter("FirstPageFirst"):
printer.setPageOrder(QPrinter.FirstPageFirst)
else:
printer.setPageOrder(QPrinter.LastPageFirst)
printerName = Preferences.getPrinter("PrinterName")
if printerName:
printer.setPrinterName(printerName)
printDialog = QPrintDialog(printer, self)
if printDialog.exec_():
self.__print(printer)
def __printPreviewDiagram(self):
"""
Private slot called to show a print preview of the diagram.
"""
from PyQt5.QtPrintSupport import QPrintPreviewDialog
printer = QPrinter(mode=QPrinter.ScreenResolution)
printer.setFullPage(True)
if Preferences.getPrinter("ColorMode"):
printer.setColorMode(QPrinter.Color)
else:
printer.setColorMode(QPrinter.GrayScale)
if Preferences.getPrinter("FirstPageFirst"):
printer.setPageOrder(QPrinter.FirstPageFirst)
else:
printer.setPageOrder(QPrinter.LastPageFirst)
printer.setPageMargins(
Preferences.getPrinter("LeftMargin") * 10,
Preferences.getPrinter("TopMargin") * 10,
Preferences.getPrinter("RightMargin") * 10,
Preferences.getPrinter("BottomMargin") * 10,
QPrinter.Millimeter
)
printerName = Preferences.getPrinter("PrinterName")
if printerName:
printer.setPrinterName(printerName)
preview = QPrintPreviewDialog(printer, self)
preview.paintRequested[QPrinter].connect(self.__print)
preview.exec_()
def __print(self, printer):
"""
Private slot to the actual printing.
@param printer reference to the printer object (QPrinter)
"""
painter = QPainter()
painter.begin(printer)
# calculate margin and width of printout
font = QFont("times", 10)
painter.setFont(font)
fm = painter.fontMetrics()
fontHeight = fm.lineSpacing()
marginX = printer.pageRect().x() - printer.paperRect().x()
marginX = Preferences.getPrinter("LeftMargin") * \
int(printer.resolution() / 2.54) - marginX
marginY = printer.pageRect().y() - printer.paperRect().y()
marginY = Preferences.getPrinter("TopMargin") * \
int(printer.resolution() / 2.54) - marginY
width = printer.width() - marginX - \
Preferences.getPrinter("RightMargin") * \
int(printer.resolution() / 2.54)
height = printer.height() - fontHeight - 4 - marginY - \
Preferences.getPrinter("BottomMargin") * \
int(printer.resolution() / 2.54)
# write a foot note
s = self.tr("Diagram: {0}").format(self.getDiagramName())
tc = QColor(50, 50, 50)
painter.setPen(tc)
painter.drawRect(marginX, marginY, width, height)
painter.drawLine(marginX, marginY + height + 2,
marginX + width, marginY + height + 2)
painter.setFont(font)
painter.drawText(marginX, marginY + height + 4, width,
fontHeight, Qt.AlignRight, s)
# render the diagram
painter.setViewport(marginX, marginY, width, height)
self.svgWidget.renderer().render(painter)
painter.end()
class LEDButton(QPushButton):
# unset
UNSET = -1
# normal
OFF = 0
BLUE = 1
GREEN = 2
RED = 3
YELLOW = 4
# extra
CALF = 5
def __init__(self, parent):
QPushButton.__init__(self, parent)
self.fLastColor = self.UNSET
self.fColor = self.UNSET
self.fImage = QSvgWidget()
self.fImage.load(":/scalable/led_off.svg")
self.fRect = QRectF(self.fImage.rect())
self.setCheckable(True)
self.setText("")
self.setColor(self.BLUE)
def setColor(self, color):
self.fColor = color
if color == self.CALF:
self.fLastColor = self.UNSET
if self._loadImageNowIfNeeded():
if isinstance(self.fImage, QPixmap):
size = self.fImage.width()
else:
size = self.fImage.sizeHint().width()
self.fRect = QRectF(self.fImage.rect())
self.setFixedSize(self.fImage.size())
def paintEvent(self, event):
painter = QPainter(self)
event.accept()
self._loadImageNowIfNeeded()
if isinstance(self.fImage, QPixmap):
size = self.fImage.width()
rect = QRectF(0, 0, size, size)
painter.drawPixmap(rect, self.fImage, rect)
else:
size = self.fImage.sizeHint().width()
rect = QRectF(0, 0, size, size)
self.fImage.renderer().render(painter, rect)
def _loadImageNowIfNeeded(self):
if self.isChecked():
if self.fLastColor == self.fColor:
return
if self.fColor == self.OFF:
img = ":/scalable/led_off.svg"
elif self.fColor == self.BLUE:
img = ":/scalable/led_blue.svg"
elif self.fColor == self.GREEN:
img = ":/scalable/led_green.svg"
elif self.fColor == self.RED:
img = ":/scalable/led_red.svg"
elif self.fColor == self.YELLOW:
img = ":/scalable/led_yellow.svg"
elif self.fColor == self.CALF:
img = ":/bitmaps/led_calf_on.png"
else:
return False
self.fLastColor = self.fColor
elif self.fLastColor != self.OFF:
img = ":/bitmaps/led_calf_off.png" if self.fColor == self.CALF else ":/scalable/led_off.svg"
self.fLastColor = self.OFF
else:
return False
if img.endswith(".png"):
if not isinstance(self.fImage, QPixmap):
self.fImage = QPixmap()
else:
if not isinstance(self.fImage, QSvgWidget):
self.fImage = QSvgWidget()
self.fImage.load(img)
self.update()
return True
class SvgDiagram(E5MainWindow):
"""
Class implementing a dialog showing a SVG graphic.
"""
ZoomLevels = [
1,
3,
5,
7,
9,
10,
20,
30,
50,
67,
80,
90,
100,
110,
120,
133,
150,
170,
200,
240,
300,
400,
500,
600,
700,
800,
900,
1000,
]
ZoomLevelDefault = 100
def __init__(self, svgFile, parent=None, name=None):
"""
Constructor
@param svgFile filename of a SVG graphics file to show (string)
@param parent parent widget of the view (QWidget)
@param name name of the view widget (string)
"""
super(SvgDiagram, self).__init__(parent)
if name:
self.setObjectName(name)
else:
self.setObjectName("SvgDiagram")
self.setWindowTitle(self.tr("SVG-Viewer"))
self.svgWidget = QSvgWidget()
self.svgWidget.setObjectName("svgWidget")
self.svgWidget.setBackgroundRole(QPalette.Base)
self.svgWidget.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)
self.svgView = QScrollArea()
self.svgView.setObjectName("svgView")
self.svgView.setBackgroundRole(QPalette.Dark)
self.svgView.setWidget(self.svgWidget)
self.setCentralWidget(self.svgView)
self.__zoomWidget = E5ZoomWidget(
UI.PixmapCache.getPixmap("zoomOut.png"),
UI.PixmapCache.getPixmap("zoomIn.png"),
UI.PixmapCache.getPixmap("zoomReset.png"), self)
self.statusBar().addPermanentWidget(self.__zoomWidget)
self.__zoomWidget.setMapping(SvgDiagram.ZoomLevels,
SvgDiagram.ZoomLevelDefault)
self.__zoomWidget.valueChanged.connect(self.__doZoom)
# polish up the dialog
self.resize(QSize(800, 600).expandedTo(self.minimumSizeHint()))
self.zoom = 1.0
self.svgFile = svgFile
self.svgWidget.load(self.svgFile)
self.svgWidget.resize(self.svgWidget.renderer().defaultSize())
self.__initActions()
self.__initContextMenu()
self.__initToolBars()
self.grabGesture(Qt.PinchGesture)
def __initActions(self):
"""
Private method to initialize the view actions.
"""
self.closeAct = \
QAction(UI.PixmapCache.getIcon("close.png"),
self.tr("Close"), self)
self.closeAct.triggered.connect(self.close)
self.printAct = \
QAction(UI.PixmapCache.getIcon("print.png"),
self.tr("Print"), self)
self.printAct.triggered.connect(self.__printDiagram)
self.printPreviewAct = \
QAction(UI.PixmapCache.getIcon("printPreview.png"),
self.tr("Print Preview"), self)
self.printPreviewAct.triggered.connect(self.__printPreviewDiagram)
def __initContextMenu(self):
"""
Private method to initialize the context menu.
"""
self.__menu = QMenu(self)
self.__menu.addAction(self.closeAct)
self.__menu.addSeparator()
self.__menu.addAction(self.printPreviewAct)
self.__menu.addAction(self.printAct)
self.setContextMenuPolicy(Qt.CustomContextMenu)
self.customContextMenuRequested.connect(self.__showContextMenu)
def __showContextMenu(self, coord):
"""
Private slot to show the context menu of the listview.
@param coord the position of the mouse pointer (QPoint)
"""
self.__menu.popup(self.mapToGlobal(coord))
def __initToolBars(self):
"""
Private method to populate the toolbars with our actions.
"""
self.windowToolBar = QToolBar(self.tr("Window"), self)
self.windowToolBar.setIconSize(UI.Config.ToolBarIconSize)
self.windowToolBar.addAction(self.closeAct)
self.graphicsToolBar = QToolBar(self.tr("Graphics"), self)
self.graphicsToolBar.setIconSize(UI.Config.ToolBarIconSize)
self.graphicsToolBar.addAction(self.printPreviewAct)
self.graphicsToolBar.addAction(self.printAct)
self.addToolBar(Qt.TopToolBarArea, self.windowToolBar)
self.addToolBar(Qt.TopToolBarArea, self.graphicsToolBar)
def getDiagramName(self):
"""
Public method to retrieve a name for the diagram.
@return name for the diagram
"""
return self.svgFile
def wheelEvent(self, evt):
"""
Protected method to handle wheel events.
@param evt reference to the wheel event (QWheelEvent)
"""
if evt.modifiers() & Qt.ControlModifier:
if qVersion() >= "5.0.0":
delta = evt.angleDelta().y()
else:
delta = evt.delta()
if delta < 0:
self.__zoomOut()
else:
self.__zoomIn()
evt.accept()
return
super(SvgDiagram, self).wheelEvent(evt)
def event(self, evt):
"""
Public method handling events.
@param evt reference to the event (QEvent)
@return flag indicating, if the event was handled (boolean)
"""
if evt.type() == QEvent.Gesture:
self.gestureEvent(evt)
return True
return super(SvgDiagram, self).event(evt)
def gestureEvent(self, evt):
"""
Protected method handling gesture events.
@param evt reference to the gesture event (QGestureEvent
"""
pinch = evt.gesture(Qt.PinchGesture)
if pinch:
if pinch.state() == Qt.GestureStarted:
pinch.setScaleFactor(self.__zoom() / 100)
else:
self.__doZoom(int(pinch.scaleFactor() * 100))
evt.accept()
###########################################################################
## Private menu handling methods below.
###########################################################################
def __adjustScrollBar(self, scrollBar, factor):
"""
Private method to adjust a scrollbar by a certain factor.
@param scrollBar reference to the scrollbar object (QScrollBar)
@param factor factor to adjust by (float)
"""
scrollBar.setValue(
int(factor * scrollBar.value() +
((factor - 1) * scrollBar.pageStep() / 2)))
def __levelForZoom(self, zoom):
"""
Private method determining the zoom level index given a zoom factor.
@param zoom zoom factor (integer)
@return index of zoom factor (integer)
"""
try:
index = SvgDiagram.ZoomLevels.index(zoom)
except ValueError:
for index in range(len(SvgDiagram.ZoomLevels)):
if zoom <= SvgDiagram.ZoomLevels[index]:
break
return index
def __doZoom(self, value):
"""
Private method to set the zoom value in percent.
@param value zoom value in percent (integer)
"""
oldValue = self.__zoom()
if value != oldValue:
self.svgWidget.resize(value / 100 * self.svgWidget.sizeHint())
factor = value / oldValue
self.__adjustScrollBar(self.svgView.horizontalScrollBar(), factor)
self.__adjustScrollBar(self.svgView.verticalScrollBar(), factor)
self.__zoomWidget.setValue(value)
def __zoomIn(self):
"""
Private method to zoom into the SVG.
"""
index = self.__levelForZoom(self.__zoom())
if index < len(SvgDiagram.ZoomLevels) - 1:
self.__doZoom(SvgDiagram.ZoomLevels[index + 1])
def __zoomOut(self):
"""
Private method to zoom out of the SVG.
"""
index = self.__levelForZoom(self.__zoom())
if index > 0:
self.__doZoom(SvgDiagram.ZoomLevels[index - 1])
def __zoomReset(self):
"""
Private method to reset the zoom value.
"""
self.__doZoom(SvgDiagram.ZoomLevels[SvgDiagram.ZoomLevelDefault])
def __zoom(self):
"""
Private method to get the current zoom factor in percent.
@return current zoom factor in percent (integer)
"""
return int(self.svgWidget.width() / self.svgWidget.sizeHint().width() *
100.0)
def __printDiagram(self):
"""
Private slot called to print the diagram.
"""
printer = QPrinter(mode=QPrinter.ScreenResolution)
printer.setFullPage(True)
if Preferences.getPrinter("ColorMode"):
printer.setColorMode(QPrinter.Color)
else:
printer.setColorMode(QPrinter.GrayScale)
if Preferences.getPrinter("FirstPageFirst"):
printer.setPageOrder(QPrinter.FirstPageFirst)
else:
printer.setPageOrder(QPrinter.LastPageFirst)
printerName = Preferences.getPrinter("PrinterName")
if printerName:
printer.setPrinterName(printerName)
printDialog = QPrintDialog(printer, self)
if printDialog.exec_():
self.__print(printer)
def __printPreviewDiagram(self):
"""
Private slot called to show a print preview of the diagram.
"""
from PyQt5.QtPrintSupport import QPrintPreviewDialog
printer = QPrinter(mode=QPrinter.ScreenResolution)
printer.setFullPage(True)
if Preferences.getPrinter("ColorMode"):
printer.setColorMode(QPrinter.Color)
else:
printer.setColorMode(QPrinter.GrayScale)
if Preferences.getPrinter("FirstPageFirst"):
printer.setPageOrder(QPrinter.FirstPageFirst)
else:
printer.setPageOrder(QPrinter.LastPageFirst)
printer.setPageMargins(
Preferences.getPrinter("LeftMargin") * 10,
Preferences.getPrinter("TopMargin") * 10,
Preferences.getPrinter("RightMargin") * 10,
Preferences.getPrinter("BottomMargin") * 10, QPrinter.Millimeter)
printerName = Preferences.getPrinter("PrinterName")
if printerName:
printer.setPrinterName(printerName)
preview = QPrintPreviewDialog(printer, self)
preview.paintRequested[QPrinter].connect(self.__print)
preview.exec_()
def __print(self, printer):
"""
Private slot to the actual printing.
@param printer reference to the printer object (QPrinter)
"""
painter = QPainter()
painter.begin(printer)
# calculate margin and width of printout
font = QFont("times", 10)
painter.setFont(font)
fm = painter.fontMetrics()
fontHeight = fm.lineSpacing()
marginX = printer.pageRect().x() - printer.paperRect().x()
marginX = Preferences.getPrinter("LeftMargin") * \
int(printer.resolution() / 2.54) - marginX
marginY = printer.pageRect().y() - printer.paperRect().y()
marginY = Preferences.getPrinter("TopMargin") * \
int(printer.resolution() / 2.54) - marginY
width = printer.width() - marginX - \
Preferences.getPrinter("RightMargin") * \
int(printer.resolution() / 2.54)
height = printer.height() - fontHeight - 4 - marginY - \
Preferences.getPrinter("BottomMargin") * \
int(printer.resolution() / 2.54)
# write a foot note
s = self.tr("Diagram: {0}").format(self.getDiagramName())
tc = QColor(50, 50, 50)
painter.setPen(tc)
painter.drawRect(marginX, marginY, width, height)
painter.drawLine(marginX, marginY + height + 2, marginX + width,
marginY + height + 2)
painter.setFont(font)
painter.drawText(marginX, marginY + height + 4, width, fontHeight,
Qt.AlignRight, s)
# render the diagram
painter.setViewport(marginX, marginY, width, height)
self.svgWidget.renderer().render(painter)
painter.end()
class ScalableButton(QPushButton):
def __init__(self, parent):
QPushButton.__init__(self, parent)
self.fImageNormal = None
self.fImageDown = None
self.fImageHover = None
self.fImageRect = QRectF()
self.fIsHovered = False
self.fTopText = ""
self.fTopTextColor = QColor()
self.fTopTextFont = QFont()
self.setText("")
def setPixmaps(self, normal, down, hover):
self.fImageNormal = QPixmap()
self.fImageDown = QPixmap()
self.fImageHover = QPixmap()
self._loadImages(normal, down, hover)
def setSvgs(self, normal, down, hover):
self.fImageNormal = QSvgWidget()
self.fImageDown = QSvgWidget()
self.fImageHover = QSvgWidget()
self._loadImages(normal, down, hover)
def _loadImages(self, normal, down, hover):
self.fImageNormal.load(normal)
self.fImageDown.load(down)
self.fImageHover.load(hover)
if isinstance(self.fImageNormal, QPixmap):
width = self.fImageNormal.width()
height = self.fImageNormal.height()
else:
width = self.fImageNormal.sizeHint().width()
height = self.fImageNormal.sizeHint().height()
self.fImageRect = QRectF(0, 0, width, height)
self.setMinimumSize(width, height)
self.setMaximumSize(width, height)
def setTopText(self, text, color, font):
self.fTopText = text
self.fTopTextColor = color
self.fTopTextFont = font
def enterEvent(self, event):
self.fIsHovered = True
QPushButton.enterEvent(self, event)
def leaveEvent(self, event):
self.fIsHovered = False
QPushButton.leaveEvent(self, event)
def paintEvent(self, event):
painter = QPainter(self)
event.accept()
if self.fImageNormal is None:
return
if isinstance(self.fImageNormal, QPixmap):
self.paintEventPixmap(painter)
else:
self.paintEventSvg(painter)
if not self.fTopText:
return
painter.save()
painter.setPen(self.fTopTextColor)
painter.setBrush(self.fTopTextColor)
painter.setFont(self.fTopTextFont)
painter.drawText(QPointF(10, 16), self.fTopText)
painter.restore()
def paintEventPixmap(self, painter):
if not self.isEnabled():
painter.save()
painter.setOpacity(0.2)
painter.drawPixmap(self.fImageRect, self.fImageNormal,
self.fImageRect)
painter.restore()
elif self.isChecked() or self.isDown():
painter.drawPixmap(self.fImageRect, self.fImageDown,
self.fImageRect)
elif self.fIsHovered:
painter.drawPixmap(self.fImageRect, self.fImageHover,
self.fImageRect)
else:
painter.drawPixmap(self.fImageRect, self.fImageNormal,
self.fImageRect)
def paintEventSvg(self, painter):
if not self.isEnabled():
painter.save()
painter.setOpacity(0.2)
self.fImageNormal.renderer().render(painter, self.fImageRect)
painter.restore()
elif self.isChecked() or self.isDown():
self.fImageDown.renderer().render(painter, self.fImageRect)
elif self.fIsHovered:
self.fImageHover.renderer().render(painter, self.fImageRect)
else:
self.fImageNormal.renderer().render(painter, self.fImageRect)