#!/usr/bin/env python

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## This file is part of the test suite of the Qt Toolkit.

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import sys

from PyQt4.QtCore import *

from PyQt4.QtGui import *

from PyQt4.QtSvg import QSvgGenerator

if __name__ == "__main__":

    app = QApplication(sys.argv)

    #device = QSvgGenerator()

    #device.setFileName("qpen-dashpattern.svg")

    #device.setSize(QSize(216, 144))

    #device.setResolution(72)

    device = QImage(192, 144, QImage.Format_ARGB32)

    device.fill(qRgba(0, 0, 0, 0))

    #resolution = device.resolution() # dpi

    #dpp = resolution / 72.0

    p = QPainter()

    p.begin(device)

    width = 8

    pen = QPen()

    pen.setWidth(width)

    pen.setDashPattern([4, 2])

    pen.setCapStyle(Qt.FlatCap)

    faded_pen = QPen()

    faded_pen.setWidth(width)

    faded_pen.setDashPattern([4, 2])

    faded_pen.setColor(QColor(160, 160, 160))

    faded_pen.setCapStyle(Qt.FlatCap)

    font = QFont("Monospace")

    font.setPointSize(12)

    p.setFont(font)

    p.setBrush(QColor(160, 0, 0))

    for x in range(-6, 9):

        if x % 4 == 0:

            length = 6

        else:

            length = 2

        p.drawLine(64 + x * width, 4, 64 + x * width, 4 + length)

        p.drawLine(64 + x * width, 136, 64 + x * width, 136 - length)

    offsets = (0, 2, 3.5, 4, 5, 6)

    for i in range(len(offsets)):

        offset = offsets[i]

        pen.setDashOffset(offset)

        p.setPen(faded_pen)

        p.drawLine(64 - offset * width, 20 + (i * 20), 64, 20 + (i * 20))

        p.setPen(pen)

        p.drawLine(64, 20 + (i * 20), 128, 20 + (i * 20))

        p.drawText(150, 25 + (i * 20), str(offset))

    p.end()

    device.save("qpen-dashpattern.png")

    sys.exit()