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 <gtk/gtk.h>
#include <string.h>

#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：