gnome-devel-docs 3.28.0-1 / usr / share / help / gl / gnome-devel-demos / grid.py.page

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<?xml version="1.0" encoding="utf-8"?>
<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="grid.py" xml:lang="gl">
  <info>
    <title type="text">Grid (Python)</title>
    <link type="guide" xref="beginner.py#layout"/>
    <link type="seealso" xref="label.py"/>
    <link type="next" xref="separator.py"/>
    <revision version="0.2" date="2012-08-01" status="stub"/>

    <credit type="author copyright">
      <name>Tiffany Antopolski</name>
      <email its:translate="no">tiffany.antopolski@gmail.com</email>
      <years>2012</years>
    </credit>

    <credit type="author copyright">
      <name>Marta Maria Casetti</name>
      <email its:translate="no">mmcasetti@gmail.com</email>
      <years>2012</years>
    </credit>

    <desc>Pack widgets in rows and columns</desc>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Fran Dieguez</mal:name>
      <mal:email>frandieguez@gnome.org</mal:email>
      <mal:years>2012-2013.</mal:years>
    </mal:credit>
  </info>

  <title>Grade</title>

  <media type="image" mime="image/png" src="media/grid_simple.png"/>
  <p>Some labels in a grid.</p>

  <links type="section"/>

  <section id="code">
    <title>Código usado para xerar este exemplo</title>
    <code mime="text/python" style="numbered">from gi.repository import Gtk
import sys


class MyWindow(Gtk.ApplicationWindow):

    def __init__(self, app):
        Gtk.Window.__init__(self, title="Grid Example", application=app)

        # three labels
        label_top_left = Gtk.Label(label="This is Top Left")
        label_top_right = Gtk.Label(label="This is Top Right")
        label_bottom = Gtk.Label(label="This is Bottom")

        # a grid
        grid = Gtk.Grid()

        # some space between the columns of the grid
        grid.set_column_spacing(20)

        # in the grid:
        # attach the first label in the top left corner
        grid.attach(label_top_left, 0, 0, 1, 1)
        # attach the second label
        grid.attach(label_top_right, 1, 0, 1, 1)
        # attach the third label below the first label
        grid.attach_next_to(
            label_bottom, label_top_left, Gtk.PositionType.BOTTOM, 2, 1)

        # add the grid to the window
        self.add(grid)


class MyApplication(Gtk.Application):

    def __init__(self):
        Gtk.Application.__init__(self)

    def do_activate(self):
        win = MyWindow(self)
        win.show_all()

app = MyApplication()
exit_status = app.run(sys.argv)
sys.exit(exit_status)
</code>
  </section>

  <section id="methods">
    <title>Useful methods for a Grid widget</title>

    <list>
      <item><p>To attach a widget <code>child</code> in position <code>left, top</code> in a slot of given <code>width, height</code> use <code>attach(child, top, left, width, height)</code>. If a widget <code>sibling</code> is already in place, we can also use <code>attach_next_to(child, sibling, side, width, height)</code>, where <code>side</code> is one of <code>Gtk.PositionType.LEFT, Gtk.PositionType.RIGHT, Gtk.PositionType.TOP, Gtk.PositionType.BOTTOM</code>.</p></item>
      <item><p><code>insert_row(position)</code> and <code>insert_column(position)</code> do exactly what they say; children which are attached at or below this position are moved one row down, and children which span across this position are grown to span the new row. <code>insert_next_to(sibling, side)</code> inserts a row or column at the specified position. The new row or column is placed next to <code>sibling</code>, on the side determined by <code>side</code>; if side is <code>Gtk.PositionType.TOP</code> or <code>Gtk.PositionType.BOTTOM</code>, a row is inserted, if side is <code>Gtk.PositionType.LEFT</code> or <code>Gtk.PositionType.RIGHT</code>, a column is inserted.</p></item>
      <item><p><code>set_row_homogeneous(True)</code> and <code>set_column_homogeneous(True)</code> ensure that (respectively) every row or every column has the same width or height.</p></item>
      <item><p><code>set_row_spacing(spacing)</code> and <code>set_column_spacing(spacing)</code> force a spacing between (respectively) rows or columns. The value of <code>spacing</code> can be between <code>0</code>, which is the default value, and <code>32767</code>.</p></item>
    </list>

  </section>

  <section id="references">
    <title>API References</title>
    <p>Neste exemplo empregaremos o seguinte:</p>
    <list>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkApplication.html">GtkApplication</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkApplicationWindow.html">GtkApplicationWindow</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkLabel.html">GtkLabel</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkImage.html">GtkImage</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkGrid.html">GtkGrid</link></p></item>
    </list>
  </section>
</page>

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