[Gtk programming]Teach you to create check menu item, radio menu item

luojiafeng1984

This article will teach you how to create pop-up menu, sub menu, check menu item, radio menu item, separator menu item, and make a menu item grayed by GTK. the reason for I write this article is I did not found any document about pop-up menu, check menu item, radio menu item in GTK 2.0 reference manual. I hope the article will be useful for you.Thank you for viewing.I will be so sorry if my bad English writting confused you.

In order to create a menu, please call the gtk_menu_new() function;this function returns a pointer to a menu widget.

GtkWidget *gtk_menu_new( void );

In order to create a menu item, please call one of the below three functions:

GtkWidget *gtk_menu_item_new( void ); GtkWidget *gtk_menu_item_new_with_label( const char *label ); GtkWidget *gtk_menu_item_new_with_mnemnonic( const char *label );

the only parameter of the gtk_menu_item_new_with_label() functionrequired is menu text to display;the parameter of thegtk_menu_item_new_with_mnemnonic() function is same to that of thegtk_menu_item_new_with_label() function, but this gtk_menu_item_new_with_mnemnonic() function create a menu item with an underlined accelerator.all of the three functions return a pointer to a menu item widget;

In order to create a check menu item, please call the gtk_check_menu_item_new_with_label() function;the only parameter this function required is check menu item text todisplay,this function returns a pointer to a check menu item widget.

GtkWidget *gtk_check_menu_item_new_with_lab(const char *label);

In order to create a radio menu item, please call the gtk_radio_menu_item_new_with_label() function;the only parameter this function required is radio menu item text todisplay,this function returns a pointer to a radio menu item widget.

GtkWidget *gtk_radio_menu_item_new_with_lab(const char *label);

In order to create a separator menu item, please call the gtk_separator_menu_item_new() function;this function returns a pointer to a separator menu item widget.

GtkWidget* gtk_separator_menu_item_new(void);

In order to make a menuitem grayed, please call the gtk_widget_set_sensitive() function;this function enable or disable a widget, the first parameter is awidget to enable or disable, the second parameter takes a TRUE or FALSEvalue, which decide enable or disable the widget.

void gtk_widget_set_sensitive(GtkWidget* widget, gboolean sensitive);

In order to append a menuitem to a menu, please call the gtk_menu_shell_append() function;this function append a menu item to a menu, the first parameter is a menu widget, the second parameter is a menu item to append.

void gtk_menu_shell_append (GetWidget* menu, GetWidget* menu_item);

In order to pop up a menu, please call the gtk_menu_popup() function;this function pop up a menu, the first parameter is a menu to pop up.the second parameter is parent menu shell, which usually takes a NULLvalue. the third parameter is parent menu item, which usually takes aNULL value, the fourth parameter is menu position function, whichusually takes a NULL value, the fifths parameter is a pointer to theparameter of the fourth parameter, which usually takes a NULL value,the sixth  parameter takes the value of the member "button" of theGdkEventButton structure, the seventh parameter takes the member "time"of the GdkEventButton structure.

void gtk_menu_popup(GtkMenu *menu, GtkWidget *parent_menu_shell,         GtkWidget *parent_menu_item, GtkMenuPositionFunc func, gpointer data,         guint button, guint32 activate_time);

In order to append a submenu to a menu item, please call the gtk_menu_item_set_submenu() function;this function append a submenu to a menu item,the first parameter is parent menu item, the second parameter is a menu to append.

void gtk_menu_item_set_submenu(GtkMenuItem *menu_item,GtkWidget *submenu);

[ 本帖最后由 luojiafeng1984 于 2008-6-21 12:15 编辑 ]

luojiafeng1984

#ifndef __GTKMENU_H__ #define __GTKMENU_H__ #include <gtk/gtk.h> void on_left_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_top_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_right_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_bottom_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_toolbar_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_statusbar_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_normal_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_normal_menuitem2_active(GtkMenuItem *menuitem, gpointer data); void on_high_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_middle_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_low_menuitem_active(GtkMenuItem *menuitem, gpointer data); void on_popup_menuitem_active(GtkMenuItem *menuitem, gpointer data);    GtkWidget* CreateMenuItem(gchar* menuitemtext, GCallback func); GtkWidget* CreateRadioMenuItem(GSList* group, gchar* menuitemtext, GCallback func); GtkWidget* CreateSeparatorMenuItem();    GtkWidget* CreateCheckMenuItem(gchar* menuitemtext, GCallback func, gboolean checked); GtkWidget* CreateSubMenu(); GtkWidget* CreatePopupMenu(); #endif

luojiafeng1984

#include "GtkMenu.h" #include <stdio.h> void on_left_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Left\n"); } void on_top_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Top\n"); } void on_right_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Right\n"); } void on_bottom_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Bottom\n"); } void on_toolbar_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Toolbar\n"); } void on_statusbar_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Statusbar\n"); } void on_normal_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Normal menuitem\n"); } void on_normal_menuitem2_active(GtkMenuItem *menuitem, gpointer data) {     printf("Normal menuitem2\n"); } void on_high_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("High\n"); } void on_middle_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("middle\n"); } void on_low_menuitem_active(GtkMenuItem *menuitem, gpointer data) {     printf("Low\n"); } void on_popup_menuitem_active(GtkMenuItem *menuitem, gpointer data) { } /* * Function: CreateMenuItem * Description: the function create a normal menu item * Parameters:menuitemtext[in] menu text to display                              func [in] call back function of the menu item * Returns: a pointer to a menu item widget */         GtkWidget* CreateMenuItem(gchar* menuitemtext, GCallback func) {     GtkWidget *menuitem = gtk_menu_item_new_with_label (menuitemtext);     g_signal_connect( menuitem, "activate", G_CALLBACK(func), NULL);     return menuitem; } /* * Function: CreateRadioMenuItem * Description: the function create a radio menu item * Parameters:group[in] the radio menu item will be created will append to this group                              menuitemtext[in] menu text to display                              func [in] call back function of the menu item * Returns: a pointer to a radio menu item widget */         GtkWidget* CreateRadioMenuItem(GSList* group, gchar* menuitemtext, GCallback func) {     GtkWidget *menuitem = gtk_radio_menu_item_new_with_label (group, menuitemtext);     g_signal_connect( menuitem, "activate", G_CALLBACK(func), NULL);     return menuitem; } /* * Function: CreateSeparatorMenuItem * Description: the function create a separator menu item * Parameters:none * Returns: a pointer to a separator menu item widget */         GtkWidget* CreateSeparatorMenuItem() {     return gtk_separator_menu_item_new(); } /* * Function: CreateCheckMenuItem * Description: the function create a check menu item * Parameters:menuitemtext[in] menu text to display; func [in] call back function of the menu item;  checked[in] which takes a TRUE or FALSE value and decide to check or uncheck the menu item * Returns: a pointer to a check menu item widget */                     GtkWidget* CreateCheckMenuItem(gchar* menuitemtext, GCallback func, gboolean checked) {     GtkWidget* menuitem = gtk_check_menu_item_new_with_label (menuitemtext);     g_signal_connect( menuitem, "activate", G_CALLBACK(func), NULL);     gtk_check_menu_item_set_active((GtkCheckMenuItem *)menuitem, checked);     return menuitem; } /* * Function: CreateSubMenu * Description: the function create a submenu * Parameter:none * Returns: a pointer to a menu widget */ GtkWidget* CreateSubMenu() {   GtkWidget* menu = gtk_menu_new ();   GtkWidget* menu_item = CreateRadioMenuItem(NULL, "High", GTK_SIGNAL_FUNC(on_high_menuitem_active));   GtkWidget* normal_menu_item;   GSList* group = gtk_radio_menu_item_get_group((GtkRadioMenuItem *)menu_item);   gtk_menu_shell_append (GTK_MENU_SHELL(menu), menu_item);   gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateRadioMenuItem(group, "Middle", GTK_SIGNAL_FUNC(on_middle_menuitem_active)));   gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateRadioMenuItem(group, "Low", GTK_SIGNAL_FUNC(on_low_menuitem_active)));   gtk_widget_show_all(menu);   return menu; } /* * Function: CreatePopupMenu * Description: the function create a pop-up menu * Parameter:none * Returns: a pointer to a menu widget */ GtkWidget* CreatePopupMenu() {     /* create a menu */     GtkWidget* menu = gtk_menu_new ();   GtkWidget* menu_item = CreateRadioMenuItem(NULL, "Left", GTK_SIGNAL_FUNC(on_left_menuitem_active));   GtkWidget* normal_menu_item;   GtkWidget* popmenuitem;   /* append radio menu items to the menu */   GSList* group = gtk_radio_menu_item_get_group((GtkRadioMenuItem *)menu_item);   gtk_menu_shell_append (GTK_MENU_SHELL(menu), menu_item);   gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateRadioMenuItem(group, "Top", GTK_SIGNAL_FUNC(on_top_menuitem_active)));   gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateRadioMenuItem(group, "Right", GTK_SIGNAL_FUNC(on_right_menuitem_active)));   gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateRadioMenuItem(group, "Bottom", GTK_SIGNAL_FUNC(on_bottom_menuitem_active)));      /* append separator menu item to the menu */   gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateSeparatorMenuItem());      /* append check menu items to the menu */     gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateCheckMenuItem("Toolbar", GTK_SIGNAL_FUNC(on_toolbar_menuitem_active), TRUE));     gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateCheckMenuItem("Statusbar", GTK_SIGNAL_FUNC(on_statusbar_menuitem_active), FALSE));   gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateSeparatorMenuItem());      /* append normal menu items to the menu */   normal_menu_item = CreateMenuItem("Normal menuitem", GTK_SIGNAL_FUNC(on_normal_menuitem_active));   gtk_menu_shell_append (GTK_MENU_SHELL(menu), normal_menu_item);      /* disable a normal menu item */   gtk_widget_set_sensitive(GTK_WIDGET(normal_menu_item), FALSE);      gtk_menu_shell_append (GTK_MENU_SHELL(menu), CreateMenuItem("Normal menuitem2", GTK_SIGNAL_FUNC(on_normal_menuitem2_active)));      /* create a submenu and append to a menu item */   popmenuitem = CreateMenuItem("Popup", GTK_SIGNAL_FUNC(on_popup_menuitem_active));   gtk_menu_shell_append (GTK_MENU_SHELL(menu), popmenuitem);   gtk_menu_item_set_submenu((GtkMenuItem *)popmenuitem, CreateSubMenu());      gtk_widget_show_all(menu);   return menu; }

luojiafeng1984

#include "GtkMenu.h" /* * Function:on_button_press_event * Description: call back funtion of the button press event * Returns: TRUE if the mouse right button be clicked, otherwise, retuns FALSE */ gboolean on_button_press_event(GtkWidget *widget, GdkEventButton *event) {     if (event-> button ==3)     {         gtk_menu_popup (GTK_MENU(CreatePopupMenu()), NULL, NULL, NULL, NULL, event->button, event->time);         return TRUE;     }     return FALSE; } int main( int   argc, char *argv[] ) {     GtkWidget *window;     GtkWidget *button;     GtkWidget *menu_items;     gtk_init (&argc, &argv);     /* create a new window */     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);     gtk_window_set_title (GTK_WINDOW (window), "GTK Radio Menu Item Test");     gtk_widget_set_usize(GTK_WIDGET(window), 300, 300);     g_signal_connect (G_OBJECT (window), "delete_event", G_CALLBACK (gtk_main_quit), NULL);         /* create a button*/     button = gtk_button_new_with_label( "right click here to display the pop-up menu" );     g_signal_connect (G_OBJECT (button), "button_press_event",G_CALLBACK (on_button_press_event), NULL);         gtk_container_add(GTK_CONTAINER(window), button);                 /* display the window */     gtk_widget_show_all (window);     gtk_main ();     return 0; }

[ 本帖最后由 luojiafeng1984 于 2008-6-21 12:08 编辑 ]

luojiafeng1984

编译用

gcc RadioMenuItem.c GtkMenu.c `pkg-config --cflags --libs gtk+-2.0`

luojiafeng1984

这篇文章将教你如何用GTK创建弹出菜单，子菜单，复选菜单项，单选菜单项，分隔菜单项，以及如何让一个菜单项变灰。我在GTK 2.0参考手册上没有找到关于弹出菜单项，复选菜单项，单选菜单项的文档，所以就写了这篇文章。希望对大家有用，谢谢看贴。我的英文写作能力很差，希望不要把你们搞晕了。

    要创建一个菜单，请调用gtk_menu_new() 函数，这个函数返回一个指向菜单构件的指针。

GtkWidget *gtk_menu_new( void );

    要创建一个菜单项，请调用下列三个函数之一:

GtkWidget *gtk_menu_item_new( void ); GtkWidget *gtk_menu_item_new_with_label( const char *label ); GtkWidget *gtk_menu_item_new_with_mnemnonic( const char *label );

    gtk_menu_item_new_with_label()函数所需要的唯一参数是要显示的菜单文字。gtk_menu_item_new_with_mnemnonic()函数的参数和gtk_menu_item_new_with_label()函数的参观者数一样，但是这个函数将创建一个带有下划线的快捷菜单项，所有这三个函数都返回一个指向菜单项构件的指针。

    要创建复选菜单项，请调用gtk_check_menu_item_new_with_label()函数。这个函数需要的唯一参数是要显示的复选菜单项文字。这个函数返回一个指向复选菜单项构件的指针。

GtkWidget *gtk_check_menu_item_new_with_lab(const char *label);

    要创建单选菜单项，请调用gtk_radio_menu_item_new_with_label()函数。这个函数需要的唯一 参数是要显示的单选菜单项文字。 这个函数返回一个指向单选菜单项构件的指针。

GtkWidget *gtk_radio_menu_item_new_with_lab(const char *label);

    要创建一个分隔菜单项，请调用 gtk_separator_menu_item_new()函数。这个函数返回一个指向分隔菜单项构件的指针。

GtkWidget* gtk_separator_menu_item_new(void);

    要使一个菜单项变灰，请调用gtk_widget_set_sensitive()函数，这个函数启用或禁用一个构件。第一个参数是要启用或禁用的构件，第二个参数取TRUE或FALSE值，该值决定启用或禁用一个构件。

void gtk_widget_set_sensitive(GtkWidget* widget, gboolean sensitive);

    为了追加一个菜单项到菜单，请调用gtk_menu_shell_append() 函数，这个函数的第一个参数是菜单项构件指针，第二个参数是要追加的菜单项。

void gtk_menu_shell_append (GetWidget* menu, GetWidget* menu_item);

    要弹出一个菜单，请调用gtk_menu_popup() 函数。这个函数弹出一个菜单，第一个参数是要弹出的菜单，第二个参数是父菜单shell, 通常取NULL值。第三个参数是父菜单项，通常取NULL值。第四个参数是菜单位置函数，通常取NULL值。第五个参数是第四个参数的参数，通常取NULL值。第六个参数取GdkEventButton结构体的button成员值。第七个参数取GdkEventButton结构体的time成员值。

void gtk_menu_popup(GtkMenu *menu, GtkWidget *parent_menu_shell,         GtkWidget *parent_menu_item, GtkMenuPositionFunc func, gpointer data,         guint button, guint32 activate_time);

    为了追加一个子菜单到菜单项，请调用gtk_menu_item_set_submenu()函数。这个函数追加一个子菜单到菜单项。第一个参数是父菜单项，第二个参数是要追加的子菜单。

void gtk_menu_item_set_submenu(GtkMenuItem *menu_item,GtkWidget *submenu);