/usr/share/help/de/gnome-devel-demos/spinbutton.c.page is in gnome-devel-docs 3.28.0-1.
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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 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | <?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="spinbutton.c" xml:lang="de">
<info>
<title type="text">SpinButton (C)</title>
<link type="guide" xref="c#entry"/>
<link type="seealso" xref="scale.c"/>
<link type="seealso" xref="label.c"/>
<link type="seealso" xref="grid.c"/>
<revision version="0.2" date="2012-07-05" status="draft"/>
<credit type="author copyright">
<name>Monica Kochofar</name>
<email its:translate="no">monicakochofar@gmail.com</email>
<years>2012</years>
</credit>
<desc>Retrieve an integer or floating point number</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Mario Blättermann</mal:name>
<mal:email>mario.blaettermann@gmail.com</mal:email>
<mal:years>2011, 2013</mal:years>
</mal:credit>
</info>
<title>SpinButton</title>
<media type="image" mime="image/png" src="media/spinbutton.png"/>
<p>Choose a number, by entering it or by clicking on the -/+ buttons!</p>
<code mime="text/x-csrc" style="numbered">
#include <gtk/gtk.h>
/* This is the callback function.
* It is a handler function which reacts to the signal.
* In this case, it will notify the user the value of their spinbutton
* as a label.
*/
static void
spin_clicked (GtkSpinButton *spinbutton,
gpointer user_data)
{
GtkWidget *label = user_data;
gint value = gtk_spin_button_get_value_as_int (spinbutton);
/* %d - Is used when printing integers.
* Note: Using g_strdup_printf returns a string that must be freed.
* (In which is done below)
*/
gchar *str = g_strdup_printf ("The number you selected is %d.", value);
gtk_label_set_text (GTK_LABEL (label), str);
g_free(str);
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
/* Declare variables */
GtkWidget *window;
GtkWidget *label;
GtkWidget *grid;
GtkWidget *spin_button;
GtkAdjustment *adjustment;
/* Create a window with a title, a border width, and a default size */
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "SpinButton Example");
gtk_window_set_default_size (GTK_WINDOW (window), 210, 70);
gtk_container_set_border_width (GTK_CONTAINER (window), 5);
/* Create a label to be shown in the window */
label = gtk_label_new ("Choose a number");
/* Create an adjustment representing an adjustable bounded value */
adjustment = gtk_adjustment_new (0, 0, 100, 1, 0, 0);
/* Create a spin button that is to be as wide as possible */
spin_button = gtk_spin_button_new (adjustment, 1, 0);
gtk_widget_set_hexpand (spin_button, TRUE);
/* Connecting the "value-changed" signal for the spinbutton
* to the appropriate callback function.
*/
g_signal_connect (spin_button,
"value-changed",
G_CALLBACK (spin_clicked),
label);
/* Create a grid and arrange everything accordingly */
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 10);
gtk_grid_set_column_homogeneous (GTK_GRID (grid), TRUE);
gtk_grid_attach (GTK_GRID (grid), spin_button, 0, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), label, 0, 1, 1, 1);
gtk_container_add (GTK_CONTAINER (window), grid);
gtk_widget_show_all (window);
}
int
main (int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}
</code>
<p>
In this sample we used the following:
</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkApplication.html">GtkApplication</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkWindow.html">GtkWindow</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkSpinButton.html">GtkSpinButton</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkLabel.html">GtkLabel</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkAdjustment.html">GtkAdjustment</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkGrid.html">GtkGrid</link></p></item>
</list>
</page>
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