Difference between revisions of "Features/GTK3/Porting/Typing Turtle"

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This page is being performed while I'm porting Typing Turtle Activity to Gtk3.
 
This page is being performed while I'm porting Typing Turtle Activity to Gtk3.
  
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There is a [ticket] with some useful information that I'm using on the porting and to keep tracking this port. Besides, this wiki page will be useful to write some code snippets about what are the difficulties that I'm having on the port and maybe can be useful for someone else.
+
There is a [http://bugs.sugarlabs.org/ticket/3772 ticket] with some useful information that I'm using on the porting and to keep tracking this port. Besides, this wiki page will be useful to write some code snippets about what are the difficulties that I'm having on the port and maybe can be useful for someone else.
  
 
I will take [[User:Humitos/PortingGetBooks|this guide]] as reference on the Gtk3 porting.
 
I will take [[User:Humitos/PortingGetBooks|this guide]] as reference on the Gtk3 porting.
 +
 +
= Port to Cairo =
  
 
'''README''': before to port this activity to GTK3, we should port it to Cairo as the first step and then move to GTK3.
 
'''README''': before to port this activity to GTK3, we should port it to Cairo as the first step and then move to GTK3.
 +
 +
== Code Snippets ==
 +
 +
=== Draw a rectangle ===
 +
 +
To draw a rectangle we used to do:
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gc = self.window.new_gc()
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gc.foreground = self.area.get_colormap().alloc_color(50000, 50000, 50000)
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self.area.window.draw_rectangle(gc, True, x, y, w, h)
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 +
The arguments for ''alloc_color'' are between 1-
 +
 +
now, with cairo we should do something like this
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cr.set_source_rgb(0.762, 0.762, 0.762)
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cr.rectangle(x, y, w, h)
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cr.fill()
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 +
 +
 +
gc.foreground = self.area.get_colormap().alloc_color(0, 0, 0)
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self.area.window.draw_rectangle(gc, False, x, y, w, h)
  
 
= Code Snippets =
 
= Code Snippets =
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Every entry was a tuple of (keycode, group, level). Now, this is an object with those attributes.
 
Every entry was a tuple of (keycode, group, level). Now, this is an object with those attributes.
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= Useful links =
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* http://cairographics.org/documentation/pycairo/2/index.html
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* http://www.pygtk.org/docs/pygtk/pangocairo-class-reference.html
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* http://www.pygtk.org/docs/pygtk/class-gdkdrawable.html

Revision as of 09:09, 25 July 2012

This page is being performed while I'm porting Typing Turtle Activity to Gtk3.

There is a ticket with some useful information that I'm using on the porting and to keep tracking this port. Besides, this wiki page will be useful to write some code snippets about what are the difficulties that I'm having on the port and maybe can be useful for someone else.

I will take this guide as reference on the Gtk3 porting.

Port to Cairo

README: before to port this activity to GTK3, we should port it to Cairo as the first step and then move to GTK3.

Code Snippets

Draw a rectangle

To draw a rectangle we used to do: 

gc = self.window.new_gc()
gc.foreground = self.area.get_colormap().alloc_color(50000, 50000, 50000)
self.area.window.draw_rectangle(gc, True, x, y, w, h)

The arguments for alloc_color are between 1-

now, with cairo we should do something like this 

cr.set_source_rgb(0.762, 0.762, 0.762)
cr.rectangle(x, y, w, h)
cr.fill()



gc.foreground = self.area.get_colormap().alloc_color(0, 0, 0)
self.area.window.draw_rectangle(gc, False, x, y, w, h)

Code Snippets

Gtk.Style.fg_gc

gc = self.get_style().fg_gc[Gtk.StateType.NORMAL]

replaced by: 

gc = self.get_style().fg[Gtk.StateType.NORMAL]


Gtk.DrawingArea

self.layout = self.create_pango_layout()
self.layout.set_text(self.title_original)

replaced by: 

self.layout = self.create_pango_layout()
self.layout.set_text(self.title_original, len(self.title_original)

self.lessonbuffer = Gtk.TextBuffer.new(self.tagtable)
self.lessontext = Gtk.TextView.new_with_buffer(self.lessonbuffer)

Gtk.TextTag

instructions_tag = Gtk.TextTag('instructions')

replaced by: 

instructions_tag = Gtk.TextTag.new('instructions')

Gdk.Keymap

entries = self.keymap.get_entries_for_keyval(keyval)

replaced by: 

valid, entries = self.keymap.get_entries_for_keyval(keyval)

Every entry was a tuple of (keycode, group, level). Now, this is an object with those attributes.

Useful links

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