misc.c

开发linux应用-用gtk+和gdk开发linux图形用户界面应用－－的实例

/*
 * Sample GUI application front end.
 *
 * Auth: Eric Harlow
 *
 */

#include <gtk/gtk.h>

extern GtkWidget           *win_main;
extern GtkAcceleratorTable *accelerator_table;
extern GtkTooltips         *tooltips;

//
// CreateWidgetFromXpm
//
// Using the window information and the string with the icon color/data, 
// create a widget that represents the data.  Once done, this widget can
// be added to buttons or other container widgets.
//
GtkWidget *CreateWidgetFromXpm (GtkWidget *window, gchar **xpm_data)
{
    GdkBitmap *mask;
    GdkPixmap *pixmap_data;
    GtkWidget *pixmap_widget;

    pixmap_data = gdk_pixmap_create_from_xpm_d (
                                 win_main->window, 
                                 &mask,
                                 NULL,
                                 (gchar **) xpm_data);

    pixmap_widget = gtk_pixmap_new (pixmap_data, mask);
    gtk_widget_show (pixmap_widget);

    return (pixmap_widget);
}



//
// CreateMenuItem
//
// Creates an item and puts it in the menu and returns the item.
//
// menu - container menu
// szName - Name of the menu - NULL for a separator
// szAccel - Acceleration string - "^C" for Control-C
// szTip - Tool tips
// func - Call back function
// data - call back function data
//
// returns new menuitem
//
GtkWidget *CreateMenuItem (GtkWidget *menu, 
                           char *szName, 
                           char *szAccel,
                           char *szTip, 
                           GtkSignalFunc func,
                           gpointer data)
{
    GtkWidget *menuitem;

    // --- If there's a name, create the item and put a
    // --- Signal handler on it.
    if (szName && strlen (szName)) {
        menuitem = gtk_menu_item_new_with_label (szName);
        gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
                    GTK_SIGNAL_FUNC(func), data);
    } else {
        // --- Create a separator
        menuitem = gtk_menu_item_new ();
    }

    // --- Add menu item to the menu and show it.
    gtk_menu_append (GTK_MENU (menu), menuitem);
    gtk_widget_show (menuitem);

    // --- If there was an accelerator
    if (szAccel && szAccel[0] == '^') {
        gtk_widget_install_accelerator (menuitem, 
                                        accelerator_table,
                                        "activate", 
                                        szAccel[1], 
                                        GDK_CONTROL_MASK);
    }

    // --- If there was a tool tip
    if (szTip && strlen (szTip)) {
        gtk_tooltips_set_tip (tooltips, menuitem, szTip, NULL);
    }

    return (menuitem);
}


//
// CreateMenuCheck
//
// Create a menu checkbox
//
// menu - container menu
// szName - name of the menu
// func - Call back function.
// data - call back function data
//
// returns new menuitem
// 
GtkWidget *CreateMenuCheck (GtkWidget *menu, 
                            char *szName, 
                            GtkSignalFunc func, 
                            gpointer data)
{
    GtkWidget *menuitem;

    // --- Create menu item
    menuitem = gtk_check_menu_item_new_with_label (szName);

    // --- Add it to the menu
    gtk_menu_append (GTK_MENU (menu), menuitem);
    gtk_widget_show (menuitem);

    // --- Listen for "toggled" messages
    gtk_signal_connect (GTK_OBJECT (menuitem), "toggled",
                        GTK_SIGNAL_FUNC(func), data);

    return (menuitem);
}


//
// CreateSubMenu
//
// Create a submenu off the menubar.
//
// menubar - obviously, the menu bar.
// szName - Label given to the new submenu
//
// returns new menu widget
//
GtkWidget *CreateSubMenu (GtkWidget *menubar, char *szName)
{
    GtkWidget *menuitem;
    GtkWidget *menu;
 
    // --- Create menu
    menuitem = gtk_menu_item_new_with_label (szName);

    // --- Add it to the menubar
    gtk_widget_show (menuitem);
    gtk_menu_append (GTK_MENU (menubar), menuitem);

    // --- Get a menu and attach to the menuitem
    menu = gtk_menu_new ();
    gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), menu);

    // --- Viola!
    return (menu);
}


//
// CreateBarSubMenu
//
// Create a submenu within an existing submenu.  (In other words, it's not
// the menubar.)
//
// menu - existing submenu
// szName - label to be given to the new submenu off of this submenu
//
// returns new menu widget 
// 
GtkWidget *CreateBarSubMenu (GtkWidget *menu, char *szName)
{
    GtkWidget *menuitem;
    GtkWidget *submenu;
 
    // --- Create menu
    menuitem = gtk_menu_item_new_with_label (szName);

    // --- Add it to the menubar
    gtk_menu_bar_append (GTK_MENU_BAR (menu), menuitem);
    gtk_widget_show (menuitem);

    // --- Get a menu and attach to the menuitem
    submenu = gtk_menu_new ();
    gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);

    // --- Viola!
    return (submenu);
}