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GTK入门导读(Container物件)

/* This function rotates the position of the tabs */
void rotate_book (GtkButton *button, GtkNotebook *notebook)
{
gtk_notebook_set_tab_pos (notebook, (notebook->tab_pos +1) %4);
}

/* Add/Remove the page tabs and the borders */
void tabsborder_book (GtkButton *button, GtkNotebook *notebook)
{
gint tval = FALSE;
gint bval = FALSE;
if (notebook->show_tabs == 0)
tval = TRUE;
if (notebook->show_border == 0)
bval = TRUE;

gtk_notebook_set_show_tabs (notebook, tval);
gtk_notebook_set_show_border (notebook, bval);
}

/* Remove a page from the notebook */
void remove_book (GtkButton *button, GtkNotebook *notebook)
{
gint page;

page = gtk_notebook_current_page(notebook);
gtk_notebook_remove_page (notebook, page);
/* Need to refresh the widget --
This forces the widget to redraw itself. */
gtk_widget_draw(GTK_WIDGET(notebook), NULL);
}

void destroy (GtkWidget *widget, gpointer *data)
{
gtk_main_quit ();
}

int main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *button;
GtkWidget *table;
GtkWidget *notebook;
GtkWidget *frame;
GtkWidget *label;
GtkWidget *checkbutton;
int i;
char bufferf[32];
char bufferl[32];

gtk_init (&argc, &argv);

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

gtk_signal_connect (GTK_OBJECT (window), \"destroy\",
GTK_SIGNAL_FUNC (destroy), NULL);

gtk_container_border_width (GTK_CONTAINER (window), 10);

table = gtk_table_new(2,6,TRUE);
gtk_container_add (GTK_CONTAINER (window), table);

/* Create a new notebook, place the position of the tabs */
notebook = gtk_notebook_new ();
gtk_notebook_set_tab_pos (GTK_NOTEBOOK (notebook), GTK_POS_TOP);
gtk_table_attach_defaults(GTK_TABLE(table), notebook, 0,6,0,1);
gtk_widget_show(notebook);

/* lets append a bunch of pages to the notebook */
for (i=0; i < 5; i++) {
sprintf(bufferf, \"Append Frame %d\", i+1);
sprintf(bufferl, \"Page %d\", i+1);

frame = gtk_frame_new (bufferf);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
gtk_widget_set_usize (frame, 100, 75);
gtk_widget_show (frame);

label = gtk_label_new (bufferf);
gtk_container_add (GTK_CONTAINER (frame), label);
gtk_widget_show (label);

label = gtk_label_new (bufferl);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), frame, label);
}

/* now lets add a page to a specific spot */
checkbutton = gtk_check_button_new_with_label (\"Check me please!\");
gtk_widget_set_usize(checkbutton, 100, 75);
gtk_widget_show (checkbutton);

label = gtk_label_new (\"Add spot\");
gtk_container_add (GTK_CONTAINER (checkbutton), label);
gtk_widget_show (label);
label = gtk_label_new (\"Add page\");
gtk_notebook_insert_page (GTK_NOTEBOOK (notebook), checkbutton, label, 2);

/* Now finally lets prepend pages to the notebook */
for (i=0; i < 5; i++) {
sprintf(bufferf, \"Prepend Frame %d\", i+1);
sprintf(bufferl, \"PPage %d\", i+1);

frame = gtk_frame_new (bufferf);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
gtk_widget_set_usize (frame, 100, 75);
gtk_widget_show (frame);

label = gtk_label_new (bufferf);
gtk_container_add (GTK_CONTAINER (frame), label);
gtk_widget_show (label);

label = gtk_label_new (bufferl);
gtk_notebook_prepend_page (GTK_NOTEBOOK(notebook), frame, label);
}

/* Set what page to start at (page 4) */
gtk_notebook_set_page (GTK_NOTEBOOK(notebook), 3);

/* create a bunch of buttons */
button = gtk_button_new_with_label (\"close\");
gtk_signal_connect_object (GTK_OBJECT (button), \"clicked\",
GTK_SIGNAL_FUNC (destroy), NULL);
gtk_table_attach_defaults(GTK_TABLE(table), button, 0,1,1,2);
gtk_widget_show(button);

button = gtk_button_new_with_label (\"next page\");
gtk_signal_connect_object (GTK_OBJECT (button), \"clicked\",
(GtkSignalFunc) gtk_notebook_next_page,
GTK_OBJECT (notebook));
gtk_table_attach_defaults(GTK_TABLE(table), button, 1,2,1,2);
gtk_widget_show(button);

button = gtk_button_new_with_label (\"prev page\");
gtk_signal_connect_object (GTK_OBJECT (button), \"clicked\",
(GtkSignalFunc) gtk_notebook_prev_page,
GTK_OBJECT (notebook));
gtk_table_attach_defaults(GTK_TABLE(table), button, 2,3,1,2);
gtk_widget_show(button);

button = gtk_button_new_with_label (\"tab position\");
gtk_signal_connect_object (GTK_OBJECT (button), \"clicked\",
(GtkSignalFunc) rotate_book, GTK_OBJECT(notebook));
gtk_table_attach_defaults(GTK_TABLE(table), button, 3,4,1,2);
gtk_widget_show(button);

button = gtk_button_new_with_label (\"tabs/border on/off\");
gtk_signal_connect_object (GTK_OBJECT (button), \"clicked\",
(GtkSignalFunc) tabsborder_book,
GTK_OBJECT (notebook));
gtk_table_attach_defaults(GTK_TABLE(table), button, 4,5,1,2);
gtk_widget_show(button);

button = gtk_button_new_with_label (\"remove page\");
gtk_signal_connect_object (GTK_OBJECT (button), \"clicked\",
(GtkSignalFunc) remove_book,
GTK_OBJECT(notebook));
gtk_table_attach_defaults(GTK_TABLE(table), button, 5,6,1,2);
gtk_widget_show(button);

gtk_widget_show(table);
gtk_widget_show(window);

gtk_main ();

return 0;
}

8.2 卷动视窗
卷动视窗是用来产生在视窗内可卷动的区域. 您可以在卷动视窗中插入任意种物件, 而不管视窗大小如何, 这些物件因为在卷动区域内, 因此都可以被用到.

您可以用以下函数来产生卷动视窗:

GtkWidget* gtk_scrolled_window_new (GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment);

第一个参数是水平调整方向, 第二个是垂直调整方向. 它们一般被设为NULL.

void gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
GtkPolicyType hscrollbar_policy,
GtkPolicyType vscrollbar_policy);

第一个参数是想要改变的视窗. 第二个是设定水平卷动的方式, 第三个是垂直卷动的方式.

policy可以是GTK_POLICY_AUTOMATIC, 或GTK_POLICY_ALWAYS. GTK_POLICY_AUTOMATIC会自动决定是否使用scrollbars. GTK_POLICY_ALWAYS则scrollbars始终在那里.

这里是个将100个双态按钮包进一个卷动视窗的范例.

#include

void destroy(GtkWidget *widget, gpointer *data)
{
gtk_main_quit();
}

int main (int argc, char *argv[])
{
static GtkWidget *window;
GtkWidget *scrolled_window;
GtkWidget *table;
GtkWidget *button;
char buffer[32];
int i, j;

gtk_init (&argc, &argv);

/* Create a new dialog window for the scrolled window to be
* packed into. A dialog is just like a normal window except it has a
* vbox and a horizontal seperator packed into it. It\"s just a shortcut
* for creating dialogs */
window = gtk_dialog_new ();
gtk_signal_connect (GTK_OBJECT (window), \"destroy\",
(GtkSignalFunc) destroy, NULL);
gtk_window_set_title (GTK_WINDOW (window), \"dialog\");
gtk_container_border_width (GTK_CONTAINER (window), 0);

/* create a new scrolled window. */
scrolled_window = gtk_scrolled_window_new (NULL, NULL);

gtk_container_border_width (GTK_CONTAINER (scrolled_window), 10);

/* the policy is one of GTK_POLICY AUTOMATIC, or GTK_POLICY_ALWAYS.
* GTK_POLICY_AUTOMATIC will automatically decide whether you need
* scrollbars, wheras GTK_POLICY_ALWAYS will always leave the scrollbars
* there. The first one is the horizontal scrollbar, the second,
* the vertical. */
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
/* The dialog window is created with a vbox packed into it. */
gtk_box_pack_start (GTK_BOX (GTK_DIALOG(window)->vbox), scrolled_window,
TRUE, TRUE, 0);
gtk_widget_show (scrolled_window);

/* create a table of 10 by 10 squares. */
table = gtk_table_new (10, 10, FALSE);

/* set the spacing to 10 on x and 10 on y */
gtk_table_set_row_spacings (GTK_TABLE (table), 10);
gtk_table_set_col_spacings (GTK_TABLE (table), 10);

/* pack the table into the scrolled window */
gtk_container_add (GTK_CONTAINER (scrolled_window), table);
gtk_widget_show (table);

/* this simply creates a grid of toggle buttons on the table
* to demonstrate the scrolled window. */
for (i = 0; i < 10; i++)
for (j = 0; j < 10; j++) {
sprintf (buffer, \"button (%d,%d)\\n\", i, j);
button = gtk_toggle_button_new_with_label (buffer);
gtk_table_attach_defaults (GTK_TABLE (table), button,
i, i+1, j, j+1);
gtk_widget_show (button);
}

/* Add a \"close\" button to the bottom of the dialog */
button = gtk_button_new_with_label (\"close\");
gtk_signal_connect_object (GTK_OBJECT (button), \"clicked\",
(GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT (window));

/* this makes it so the button is the default. */

GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (window)->action_area), button, TRUE, TRUE, 0);

/* This grabs this button to be the default button. Simply hitting
* the \"Enter\" key will cause this button to activate. */
gtk_widget_grab_default (button);
gtk_widget_show (button);

gtk_widget_show (window);

gtk_main();

return(0);
}

玩弄一下这个视窗. 您会看到scrollbars如何反应. 您也会想用用gtk_widget_set_usize()来设定视窗内定的大小.

发布人:netbull 来自:Linux开发指南

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