linux下gtk+一个将字符串大写化的小示例

首先用glade画图形界面:

并且设置gtk元素名称(ID)以及设置事件回调函数。

下面写代码:

#include  #include  #define UI_PATH "./entry.ui" #define MAIN_WINDOW "window" #define CHK_EDITABLE "chk_editable" #define CHK_VISIBLE "chk_visible" void editable_toggled(GtkWidget *self,GtkEntry *entry){ //gtk_entry_set_editable(entry,GTK_TOGGLE_BUTTON(self)->active); printf("%s:enter function\n",__func__); gtk_editable_set_editable((GtkEditable*)entry,gtk_toggle_button_get_active(
        GTK_TOGGLE_BUTTON(self)));
} void visible_toggled(GtkWidget *self,GtkEntry *entry){
    //gtk_entry_set_visibility(entry,GTK_TOGGLE_BUTTON(self)->active); printf("%s:enter function\n",__func__); gtk_entry_set_visibility(entry,gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(self)));
} void entry_changed(GtkWidget *self,gpointer user_data){ gchar *text = (gchar*)gtk_entry_get_text(GTK_ENTRY(self)); printf("%s:text is %s\n",__func__,text); text = g_ascii_strup(text,strlen(text)); gtk_entry_set_text(GTK_ENTRY(self),text);
} int main(int argc,char **argv){ GtkWidget *w; GError *error; gtk_init(&argc,&argv); GtkBuilder *builder = gtk_builder_new(); if(!gtk_builder_add_from_file(builder,UI_PATH,&error)){ g_critical("Couldn't load builder file: %s",error->message); g_error_free(error);
    } w = GTK_WIDGET(gtk_builder_get_object(builder,MAIN_WINDOW)); if(!w){ g_critical("Widget \"%s\" is missing in file %s",MAIN_WINDOW,UI_PATH);
    } gtk_window_set_title(GTK_WINDOW(w),"clist todo list"); gtk_window_set_default_size(GTK_WINDOW(w),300,100); gtk_window_set_position(GTK_WINDOW(w),GTK_WIN_POS_CENTER_ALWAYS); gtk_container_set_border_width(GTK_CONTAINER(w),5); gtk_builder_connect_signals(builder,NULL); g_object_unref(builder); gtk_widget_show_all(w); gtk_main(); return 0;
}

GtkEntry有2个更改事件，分别是activate和changed；前者在文本输入控件内按回车时触发，后者当文本控件内部的文本发生变化时触发。

编译完毕执行效果如下：