#!/usr/bin/env python

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## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2016 The Qt Company Ltd.
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## This file is part of the Qt for Python examples of the Qt Toolkit.
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"""PySide2 port of the widgets/painting/basicdrawing example from Qt v5.x, originating from PyQt"""

from PySide2.QtCore import QPoint, QRect, QSize, Qt, qVersion
from PySide2.QtGui import (QBrush, QConicalGradient, QLinearGradient, QPainter,
        QPainterPath, QPalette, QPen, QPixmap, QPolygon, QRadialGradient)
from PySide2.QtWidgets import (QApplication, QCheckBox, QComboBox, QGridLayout,
        QLabel, QSpinBox, QWidget)

import basicdrawing_rc


class RenderArea(QWidget):
    points = QPolygon([
        QPoint(10, 80),
        QPoint(20, 10),
        QPoint(80, 30),
        QPoint(90, 70)
    ])

    Line, Points, Polyline, Polygon, Rect, RoundedRect, Ellipse, Arc, Chord, \
            Pie, Path, Text, Pixmap = range(13)

    def __init__(self, parent=None):
        super(RenderArea, self).__init__(parent)

        self.pen = QPen()
        self.brush = QBrush()
        self.pixmap = QPixmap()

        self.shape = RenderArea.Polygon
        self.antialiased = False
        self.transformed = False
        self.pixmap.load(':/images/qt-logo.png')

        self.setBackgroundRole(QPalette.Base)
        self.setAutoFillBackground(True)

    def minimumSizeHint(self):
        return QSize(100, 100)

    def sizeHint(self):
        return QSize(400, 200)

    def setShape(self, shape):
        self.shape = shape
        self.update()

    def setPen(self, pen):
        self.pen = pen
        self.update()

    def setBrush(self, brush):
        self.brush = brush
        self.update()

    def setAntialiased(self, antialiased):
        self.antialiased = antialiased
        self.update()

    def setTransformed(self, transformed):
        self.transformed = transformed
        self.update()

    def paintEvent(self, event):
        rect = QRect(10, 20, 80, 60)

        path = QPainterPath()
        path.moveTo(20, 80)
        path.lineTo(20, 30)
        path.cubicTo(80, 0, 50, 50, 80, 80)

        startAngle = 30 * 16
        arcLength = 120 * 16

        painter = QPainter(self)
        painter.setPen(self.pen)
        painter.setBrush(self.brush)
        if self.antialiased:
            painter.setRenderHint(QPainter.Antialiasing)

        for x in range(0, self.width(), 100):
            for y in range(0, self.height(), 100):
                painter.save()
                painter.translate(x, y)
                if self.transformed:
                    painter.translate(50, 50)
                    painter.rotate(60.0)
                    painter.scale(0.6, 0.9)
                    painter.translate(-50, -50)

                if self.shape == RenderArea.Line:
                    painter.drawLine(rect.bottomLeft(), rect.topRight())
                elif self.shape == RenderArea.Points:
                    painter.drawPoints(RenderArea.points)
                elif self.shape == RenderArea.Polyline:
                    painter.drawPolyline(RenderArea.points)
                elif self.shape == RenderArea.Polygon:
                    painter.drawPolygon(RenderArea.points)
                elif self.shape == RenderArea.Rect:
                    painter.drawRect(rect)
                elif self.shape == RenderArea.RoundedRect:
                    painter.drawRoundedRect(rect, 25, 25, Qt.RelativeSize)
                elif self.shape == RenderArea.Ellipse:
                    painter.drawEllipse(rect)
                elif self.shape == RenderArea.Arc:
                    painter.drawArc(rect, startAngle, arcLength)
                elif self.shape == RenderArea.Chord:
                    painter.drawChord(rect, startAngle, arcLength)
                elif self.shape == RenderArea.Pie:
                    painter.drawPie(rect, startAngle, arcLength)
                elif self.shape == RenderArea.Path:
                    painter.drawPath(path)
                elif self.shape == RenderArea.Text:
                    painter.drawText(rect, Qt.AlignCenter,
                                     "PySide 2\nQt %s" % qVersion())
                elif self.shape == RenderArea.Pixmap:
                    painter.drawPixmap(10, 10, self.pixmap)

                painter.restore()

        painter.setPen(self.palette().dark().color())
        painter.setBrush(Qt.NoBrush)
        painter.drawRect(QRect(0, 0, self.width() - 1, self.height() - 1))


IdRole = Qt.UserRole

class Window(QWidget):
    def __init__(self):
        super(Window, self).__init__()

        self.renderArea = RenderArea()

        self.shapeComboBox = QComboBox()
        self.shapeComboBox.addItem("Polygon", RenderArea.Polygon)
        self.shapeComboBox.addItem("Rectangle", RenderArea.Rect)
        self.shapeComboBox.addItem("Rounded Rectangle", RenderArea.RoundedRect)
        self.shapeComboBox.addItem("Ellipse", RenderArea.Ellipse)
        self.shapeComboBox.addItem("Pie", RenderArea.Pie)
        self.shapeComboBox.addItem("Chord", RenderArea.Chord)
        self.shapeComboBox.addItem("Path", RenderArea.Path)
        self.shapeComboBox.addItem("Line", RenderArea.Line)
        self.shapeComboBox.addItem("Polyline", RenderArea.Polyline)
        self.shapeComboBox.addItem("Arc", RenderArea.Arc)
        self.shapeComboBox.addItem("Points", RenderArea.Points)
        self.shapeComboBox.addItem("Text", RenderArea.Text)
        self.shapeComboBox.addItem("Pixmap", RenderArea.Pixmap)

        shapeLabel = QLabel("&Shape:")
        shapeLabel.setBuddy(self.shapeComboBox)

        self.penWidthSpinBox = QSpinBox()
        self.penWidthSpinBox.setRange(0, 20)
        self.penWidthSpinBox.setSpecialValueText("0 (cosmetic pen)")

        penWidthLabel = QLabel("Pen &Width:")
        penWidthLabel.setBuddy(self.penWidthSpinBox)

        self.penStyleComboBox = QComboBox()
        self.penStyleComboBox.addItem("Solid", Qt.SolidLine)
        self.penStyleComboBox.addItem("Dash", Qt.DashLine)
        self.penStyleComboBox.addItem("Dot", Qt.DotLine)
        self.penStyleComboBox.addItem("Dash Dot", Qt.DashDotLine)
        self.penStyleComboBox.addItem("Dash Dot Dot", Qt.DashDotDotLine)
        self.penStyleComboBox.addItem("None", Qt.NoPen)

        penStyleLabel = QLabel("&Pen Style:")
        penStyleLabel.setBuddy(self.penStyleComboBox)

        self.penCapComboBox = QComboBox()
        self.penCapComboBox.addItem("Flat", Qt.FlatCap)
        self.penCapComboBox.addItem("Square", Qt.SquareCap)
        self.penCapComboBox.addItem("Round", Qt.RoundCap)

        penCapLabel = QLabel("Pen &Cap:")
        penCapLabel.setBuddy(self.penCapComboBox)

        self.penJoinComboBox = QComboBox()
        self.penJoinComboBox.addItem("Miter", Qt.MiterJoin)
        self.penJoinComboBox.addItem("Bevel", Qt.BevelJoin)
        self.penJoinComboBox.addItem("Round", Qt.RoundJoin)

        penJoinLabel = QLabel("Pen &Join:")
        penJoinLabel.setBuddy(self.penJoinComboBox)

        self.brushStyleComboBox = QComboBox()
        self.brushStyleComboBox.addItem("Linear Gradient",
                Qt.LinearGradientPattern)
        self.brushStyleComboBox.addItem("Radial Gradient",
                Qt.RadialGradientPattern)
        self.brushStyleComboBox.addItem("Conical Gradient",
                Qt.ConicalGradientPattern)
        self.brushStyleComboBox.addItem("Texture", Qt.TexturePattern)
        self.brushStyleComboBox.addItem("Solid", Qt.SolidPattern)
        self.brushStyleComboBox.addItem("Horizontal", Qt.HorPattern)
        self.brushStyleComboBox.addItem("Vertical", Qt.VerPattern)
        self.brushStyleComboBox.addItem("Cross", Qt.CrossPattern)
        self.brushStyleComboBox.addItem("Backward Diagonal", Qt.BDiagPattern)
        self.brushStyleComboBox.addItem("Forward Diagonal", Qt.FDiagPattern)
        self.brushStyleComboBox.addItem("Diagonal Cross", Qt.DiagCrossPattern)
        self.brushStyleComboBox.addItem("Dense 1", Qt.Dense1Pattern)
        self.brushStyleComboBox.addItem("Dense 2", Qt.Dense2Pattern)
        self.brushStyleComboBox.addItem("Dense 3", Qt.Dense3Pattern)
        self.brushStyleComboBox.addItem("Dense 4", Qt.Dense4Pattern)
        self.brushStyleComboBox.addItem("Dense 5", Qt.Dense5Pattern)
        self.brushStyleComboBox.addItem("Dense 6", Qt.Dense6Pattern)
        self.brushStyleComboBox.addItem("Dense 7", Qt.Dense7Pattern)
        self.brushStyleComboBox.addItem("None", Qt.NoBrush)

        brushStyleLabel = QLabel("&Brush Style:")
        brushStyleLabel.setBuddy(self.brushStyleComboBox)

        otherOptionsLabel = QLabel("Other Options:")
        self.antialiasingCheckBox = QCheckBox("&Antialiasing")
        self.transformationsCheckBox = QCheckBox("&Transformations")

        self.shapeComboBox.activated.connect(self.shapeChanged)
        self.penWidthSpinBox.valueChanged.connect(self.penChanged)
        self.penStyleComboBox.activated.connect(self.penChanged)
        self.penCapComboBox.activated.connect(self.penChanged)
        self.penJoinComboBox.activated.connect(self.penChanged)
        self.brushStyleComboBox.activated.connect(self.brushChanged)
        self.antialiasingCheckBox.toggled.connect(self.renderArea.setAntialiased)
        self.transformationsCheckBox.toggled.connect(self.renderArea.setTransformed)

        mainLayout = QGridLayout()
        mainLayout.setColumnStretch(0, 1)
        mainLayout.setColumnStretch(3, 1)
        mainLayout.addWidget(self.renderArea, 0, 0, 1, 4)
        mainLayout.setRowMinimumHeight(1, 6)
        mainLayout.addWidget(shapeLabel, 2, 1, Qt.AlignRight)
        mainLayout.addWidget(self.shapeComboBox, 2, 2)
        mainLayout.addWidget(penWidthLabel, 3, 1, Qt.AlignRight)
        mainLayout.addWidget(self.penWidthSpinBox, 3, 2)
        mainLayout.addWidget(penStyleLabel, 4, 1, Qt.AlignRight)
        mainLayout.addWidget(self.penStyleComboBox, 4, 2)
        mainLayout.addWidget(penCapLabel, 5, 1, Qt.AlignRight)
        mainLayout.addWidget(self.penCapComboBox, 5, 2)
        mainLayout.addWidget(penJoinLabel, 6, 1, Qt.AlignRight)
        mainLayout.addWidget(self.penJoinComboBox, 6, 2)
        mainLayout.addWidget(brushStyleLabel, 7, 1, Qt.AlignRight)
        mainLayout.addWidget(self.brushStyleComboBox, 7, 2)
        mainLayout.setRowMinimumHeight(8, 6)
        mainLayout.addWidget(otherOptionsLabel, 9, 1, Qt.AlignRight)
        mainLayout.addWidget(self.antialiasingCheckBox, 9, 2)
        mainLayout.addWidget(self.transformationsCheckBox, 10, 2)
        self.setLayout(mainLayout)

        self.shapeChanged()
        self.penChanged()
        self.brushChanged()
        self.antialiasingCheckBox.setChecked(True)

        self.setWindowTitle("Basic Drawing")

    def shapeChanged(self):
        shape = self.shapeComboBox.itemData(self.shapeComboBox.currentIndex(),
                IdRole)
        self.renderArea.setShape(shape)

    def penChanged(self):
        width = self.penWidthSpinBox.value()
        style = Qt.PenStyle(self.penStyleComboBox.itemData(
                self.penStyleComboBox.currentIndex(), IdRole))
        cap = Qt.PenCapStyle(self.penCapComboBox.itemData(
                self.penCapComboBox.currentIndex(), IdRole))
        join = Qt.PenJoinStyle(self.penJoinComboBox.itemData(
                self.penJoinComboBox.currentIndex(), IdRole))

        self.renderArea.setPen(QPen(Qt.blue, width, style, cap, join))

    def brushChanged(self):
        style = Qt.BrushStyle(self.brushStyleComboBox.itemData(
                self.brushStyleComboBox.currentIndex(), IdRole))

        if style == Qt.LinearGradientPattern:
            linearGradient = QLinearGradient(0, 0, 100, 100)
            linearGradient.setColorAt(0.0, Qt.white)
            linearGradient.setColorAt(0.2, Qt.green)
            linearGradient.setColorAt(1.0, Qt.black)
            self.renderArea.setBrush(QBrush(linearGradient))
        elif style == Qt.RadialGradientPattern:
            radialGradient = QRadialGradient(50, 50, 50, 70, 70)
            radialGradient.setColorAt(0.0, Qt.white)
            radialGradient.setColorAt(0.2, Qt.green)
            radialGradient.setColorAt(1.0, Qt.black)
            self.renderArea.setBrush(QBrush(radialGradient))
        elif style == Qt.ConicalGradientPattern:
            conicalGradient = QConicalGradient(50, 50, 150)
            conicalGradient.setColorAt(0.0, Qt.white)
            conicalGradient.setColorAt(0.2, Qt.green)
            conicalGradient.setColorAt(1.0, Qt.black)
            self.renderArea.setBrush(QBrush(conicalGradient))
        elif style == Qt.TexturePattern:
            self.renderArea.setBrush(QBrush(QPixmap(':/images/brick.png')))
        else:
            self.renderArea.setBrush(QBrush(Qt.green, style))


if __name__ == '__main__':

    import sys

    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())
