linux下gtk+一个将字符串大写化的小示例

来源：互联网发布：linux下查看当前用户编辑：程序博客网时间：2024/06/03 20:48

首先用glade画图形界面:
这里写图片描述

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：
这里写图片描述

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