~doctormo/python-snippets/lp-merge-request-example

# [SNIPPET_NAME: Load an Image and detect click events]

# [SNIPPET_CATEGORIES: Clutter]

# [SNIPPET_DESCRIPTION: Render a graphic using clutter and detect user click on the image, also demonstrates using the clutter library in a functional style and OO style]

# [SNIPPET_AUTHOR: Oliver Marks <oly@digitaloctave.com>]

# [SNIPPET_LICENSE: GPL]

import clutter

#create a clutter stage and set the display size 

stage = clutter.Stage()

stage.set_size(400, 400)

#load the image for the buttons

img=clutter.cogl.texture_new_from_file('button.png',clutter.cogl.TEXTURE_NO_SLICING, clutter.cogl.PIXEL_FORMAT_ANY)

#example create button from class  start

class button(clutter.Texture):

    def __init__(self,id,row=1,padding=10):

        clutter.Texture.__init__(self)

        self.row=row

        self.id=id

        self.set_size (100,100)

        self.set_position (id*100,self.row*100)

        self.set_cogl_texture(img)

        self.set_reactive(True)

        #call click method on button clicked

        self.connect("button-press-event",self.clicked)

    def clicked(self,stage, event):

        print "class click="+str(self.id)+" row "+str(self.row)

#list of button class

buttonlist1=[]

for i in range(0,10):

    buttonlist1.append(button(i))

#add the buttons to the stage 

for b in buttonlist1:

    stage.add(b)

#example create button from class end

#example class with collection of button class 

class buttons:

    def __init__(self):

        self.buttonlist=[]

        self.count=0

        for i in range(0,10):

            self.buttonlist.append(button(self.count,row=2))

            #stage.add(self.buttonlist[self.count])

            self.count+=1

    #iter method so we can step through all buttons in a for loop

    def __iter__(self):

        for i in self.buttonlist:

            yield i

    #append a new button

    def append(self,btton):

        self.buttonlist.append(self.count)

        self.count+=1

#crate instance of buttons class

#append buttons class to stage

buttonlist2=buttons()

for b in buttonlist2:

    stage.add(b)

#example class with collection of button class end

#example of creating button with function calls start

#function call back on hit of button

def button_click(stage, event):

    print "no class test button press"

rectangle_actor = clutter.Texture()

rectangle_actor.set_size (100,100)

rectangle_actor.set_cogl_texture(img)

rectangle_actor.set_reactive(True)

#call button_click function

rectangle_actor.connect("button-press-event", button_click)

#add non class button

stage.add(rectangle_actor)

#example of creating button with function calls end

#show everything in the stage

stage.show_all()

stage.connect("destroy",clutter.main_quit)

#main clutter loop

clutter.main()