Demo.applet.deprecated.CoordinatesDemo.py Maven / Gradle / Ivy

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"""A rough translation of an example from the Java Tutorial
http://java.sun.com/docs/books/tutorial/

This example shows how to do very simple Canvas Drawing
"""

from java import applet, awt
from pawt import GridBag


class CoordinatesDemo(applet.Applet):
    def init(self):
        bag = GridBag(self)

        self.framedArea = FramedArea(self)
        bag.addRow(self.framedArea, weighty=1.0, fill='BOTH')

        self.label = awt.Label('Click within the framed area')
        bag.addRow(self.label, weightx=1.0, weighty=0.0, fill='HORIZONTAL')

    def updateLabel(self, point):
        text = 'Click occurred at coordinate (%d, %d).'
        self.label.text = text % (point.x, point.y)


class FramedArea(awt.Panel):
    def __init__(self, controller):
        self.background = awt.Color.lightGray
        self.setLayout(awt.GridLayout(1, 0))

        self.add(CoordinateArea(controller))

    def getInsets(self):
        return awt.Insets(4, 4, 5, 5)

    def paint(self, g):
        d = self.size

        g.color = self.background
        g.draw3DRect(0, 0, d.width-1, d.height-1, 1)
        g.draw3DRect(3, 3, d.width-7, d.height-7, 1)


class CoordinateArea(awt.Canvas):
    def __init__(self, controller):
        self.mousePressed = self.push
        self.controller = controller

    def push(self, e):
        try:
            self.point.x = e.x
            self.point.y = e.y
        except AttributeError:
            self.point = awt.Point(e.x, e.y)

        self.repaint()

    def paint(self, g):
        if hasattr(self, 'point'):
            self.controller.updateLabel(self.point)
            g.fillRect(self.point.x-1, self.point.y-1, 2, 2)


if __name__ == '__main__':
    import pawt
    pawt.test(CoordinatesDemo(), size=(300, 200))