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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>9.2. Arrows</title><meta name="generator" content="DocBook XSL Stylesheets V1.65.1"><link rel="home" href="index.html" title="PyGTK 2.0 Tutorial"><link rel="up" href="ch-MiscellaneousWidgets.html" title="Chapter 9. Miscellaneous Widgets"><link rel="previous" href="ch-MiscellaneousWidgets.html" title="Chapter 9. Miscellaneous Widgets"><link rel="next" href="sec-TooltipsObject.html" title="9.3. The Tooltips Object"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">9.2. Arrows</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch-MiscellaneousWidgets.html">Prev</a> </td><th width="60%" align="center">Chapter 9. Miscellaneous Widgets</th><td width="20%" align="right"> <a accesskey="n" href="sec-TooltipsObject.html">Next</a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sec-Arrows"></a>9.2. Arrows</h2></div></div><div></div></div><p>The <tt class="classname">Arrow</tt> widget draws an arrowhead,
facing in a number of possible directions and having a number of possible
styles. It can be very useful when placed on a button in many applications.
Like the <tt class="classname">Label</tt> widget, it emits no signals.</p><p>There are only two calls for manipulating an
<tt class="classname">Arrow</tt> widget:</p><table border="0" bgcolor="#E0E0E0" width="100%"><tr><td><pre class="programlisting">
arrow = gtk.Arrow(<b class="parameter"><tt>arrow_type</tt></b>, <b class="parameter"><tt>shadow_type</tt></b>)
arrow.set(<b class="parameter"><tt>arrow_type</tt></b>, <b class="parameter"><tt>shadow_type</tt></b>)
</pre></td></tr></table><p>The first creates a new arrow widget with the indicated type and
appearance. The second allows these values to be altered retrospectively.
The <i class="parameter"><tt>arrow_type</tt></i> argument may take one of the following
values:</p><table border="0" bgcolor="#E0E0E0" width="100%"><tr><td><pre class="programlisting">
ARROW_UP
ARROW_DOWN
ARROW_LEFT
ARROW_RIGHT
</pre></td></tr></table><p>These values obviously indicate the direction in which the arrow
will point. The <i class="parameter"><tt>shadow_type</tt></i> argument may take one of
these values:</p><table border="0" bgcolor="#E0E0E0" width="100%"><tr><td><pre class="programlisting">
SHADOW_IN
SHADOW_OUT # the default
SHADOW_ETCHED_IN
SHADOW_ETCHED_OUT
</pre></td></tr></table><p>The <a href="examples/arrow.py" target="_top"><span><b class="command">arrow.py</b></span></a> example program
briefly illustrates their use.
<a href="sec-Arrows.html#arrowsfig" title="Figure 9.2. Arrows Buttons Examples">Figure 9.2, “Arrows Buttons Examples”</a> illustrates the result of running the
program:</p><div class="figure"><a name="arrowsfig"></a><p class="title"><b>Figure 9.2. Arrows Buttons Examples</b></p><div class="mediaobject" align="center"><img src="figures/arrows.png" align="middle" alt="Arrows Buttons Examples"></div></div><p>The source code for <a href="examples/arrow.py" target="_top"><span><b class="command">arrow.py</b></span></a> is:</p><table border="0" bgcolor="#E0E0E0" width="100%"><tr><td><pre class="programlisting">
1 #!/usr/bin/env python
2
3 # example arrow.py
4
5 import pygtk
6 pygtk.require('2.0')
7 import gtk
8
9 # Create an Arrow widget with the specified parameters
10 # and pack it into a button
11 def create_arrow_button(arrow_type, shadow_type):
12 button = gtk.Button();
13 arrow = gtk.Arrow(arrow_type, shadow_type);
14 button.add(arrow)
15 button.show()
16 arrow.show()
17 return button
18
19 class Arrows:
20 def __init__(self):
21 # Create a new window
22 window = gtk.Window(gtk.WINDOW_TOPLEVEL)
23
24 window.set_title("Arrow Buttons")
25
26 # It's a good idea to do this for all windows.
27 window.connect("destroy", lambda x: gtk.main_quit())
28
29 # Sets the border width of the window.
30 window.set_border_width(10)
31
32 # Create a box to hold the arrows/buttons
33 box = gtk.HBox(False, 0)
34 box.set_border_width(2)
35 window.add(box)
36
37 # Pack and show all our widgets
38 box.show()
39
40 button = create_arrow_button(gtk.ARROW_UP, gtk.SHADOW_IN)
41 box.pack_start(button, False, False, 3)
42
43 button = create_arrow_button(gtk.ARROW_DOWN, gtk.SHADOW_OUT)
44 box.pack_start(button, False, False, 3)
45
46 button = create_arrow_button(gtk.ARROW_LEFT, gtk.SHADOW_ETCHED_IN)
47 box.pack_start(button, False, False, 3)
48
49 button = create_arrow_button(gtk.ARROW_RIGHT, gtk.SHADOW_ETCHED_OUT)
50 box.pack_start(button, False, False, 3)
51
52 window.show()
53
54 def main():
55 gtk.main()
56 return 0
57
58 if __name__ == "__main__":
59 Arrows()
60 main()
</pre></td></tr></table></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch-MiscellaneousWidgets.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch-MiscellaneousWidgets.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sec-TooltipsObject.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 9. Miscellaneous Widgets </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 9.3. The Tooltips Object</td></tr></table></div></body></html>
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