[pygame] Re: New GUI

[Kamilche <kamilche@xxxxxxxxxxxx>]

Marcus wanted an example of how events could be handled better.
I've worked up an example of how the mainline code could look, if the
event handling were done using a more VB-like structure.

import kamgui

# This example creates a screen with 2 buttons and 3 labels.

# -------------------------------------------------------------
# App level features handled with this code:
# -------------------------------------------------------------
# Clicking the buttons updates the status label.
# Moving the mouse updates the mousepos label.
# The fps label is updated when the global 'FPS' event is fired.

# --------------------------------------------------------------
# Engine level 'automatic' features:
# --------------------------------------------------------------
# The buttons automatically hilight when you hover the
# mouse over them, and unhilight when you leave.

# Clicking the button sets the focus to the button,
# and draws it with a border around it and darker text.

# Events that are targeted to a specific control, propagate
# up the ownership hierarchy until the event is handled.
# If no control is listening, the event is silently ignored.

# Events that are sent to no specific control,
# are broadcast to all 'listening' controls.

# To make a control listen, simply add the event name to the
# 'events' listbox for that control. In this example,
# the app is listening for 'MousePos' and 'FPS.'

# All these engine level features are handled behind the scenes.



class MyApp(kamgui.App):
    events = ['MousePos', 'FPS']

    def On_Initialize(self, e):
        ' Create the controls '
        self.mousepos = kamgui.Label(parent = self,
                        fontcolor = kamgui.constants.YELLOW)
        button = kamgui.Button(parent = self, pos = [100, 100],
                 name = 'DoNothing', caption = 'Do Nothing')
        button = kamgui.Button(parent = self, pos = [150, 210],
		name = 'DoSomething', caption = 'Do Something',
		size = [200, 50])
        self.fps = kamgui.Label(parent = self, text = 'FPS',
                pos =(self.size[0], 0), align = 'r',
		fontcolor = kamgui.constants.DKGREEN)
        self.status = kamgui.Label(parent = self,
		text = 'Welcome to KamGUI!',
                pos = (0, self.size[1]), align = 'lb')

    def On_Terminate(self, e):
        ' Quit the app'
        print 'Quitting MyApp'

    def On_FPS(self, e):
        ' Display FPS'
        self.fps.SetText('%d FPS' % e.value)

    def On_MousePos(self, e):
        ' Display current mouse position'
        self.mousepos.SetText(e.pos)

    def DoSomething_Click(self, e):
        ' Do something when button is clicked.'
        self.status.SetText('Did something.')

    def DoNothing_Click(self, e):
        ' Do nothing.'
        self.status.SetText('Did nothing.')


MyApp().Run()