GTK编程基础----状态栏、文本输入构件、组合框

GTK编程基础----状态栏、文本输入构件、组合框

2014-07-17 23:14
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目录(?)[-]

状态栏 Statusbars状态栏Statusbars是一些简单的构件一般用来显示文本消息它将文本消息压入到一个栈里面当弹出当前消息时将重新显示前一条文本消息看下***体的代码实现
文本输入构件 Text Entries文本输入构件Entry widget允许在一个单行文本框里输入和显示一行文本文本可以用函数进行操作如将新的文本替换前插追加到文本输入构件的当前内容中

状态栏 Statusbars

状态栏(Statusbars)是一些简单的构件，一般用来显示文本消息。它将文本消息压入到一个栈里面，当弹出当前消息时，将重新显示前一条文本消息。看下***体的代码实现：

[cpp]
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/*File:statusbar.c
*Date:2013-12-22
*Author:sjin
*Mail:413977243@qq.com
*/

#include <gtk/gtk.h>
#include <stdlib.h>
#include <glib.h>

GtkWidget *status_bar;

void push_item(GtkWidget *widget,gpointer data)
{
static int count = 1;
char buf[20] = {'\0'};

g_snprintf(buf,20,"Item %d",count++);
//将新消息加到状态栏
gtk_statusbar_push(GTK_STATUSBAR(status_bar),GPOINTER_TO_INT(data),buf);
return;
}

void pop_item(GtkWidget *widget,gpointer data)
{
//删除在栈中给定上下文标识符最上面的一个消息
gtk_statusbar_pop(GTK_STATUSBAR(status_bar),GPOINTER_TO_INT(data));
return;
}

int main(int argc, char*argv[])
{
GtkWidget *window;
GtkWidget *button;
GtkWidget *vbox;
gint context_id;

//初始化GTK
gtk_init(&argc,&argv);
//创建最上层主窗口
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
//连接信号"delete_event",使得窗口关闭时发生
g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(gtk_main_quit),NULL);
//设置窗口标题
gtk_window_set_title(GTK_WINDOW(window),"GTK 状态栏工具");
//设定窗口的默认宽高
//gtk_window_set_default_size(GTK_WINDOW(window),200,300);
//设定窗口的位置,让窗口总在最前端
gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER);
//设定容器边框的宽度
gtk_container_set_border_width(GTK_CONTAINER(window),20);

vbox = gtk_vbox_new(FALSE,1);
gtk_container_add(GTK_CONTAINER(window),vbox);
gtk_widget_show(vbox);

//创建一个状态栏
status_bar = gtk_statusbar_new();
gtk_box_pack_start(GTK_BOX(vbox),status_bar,TRUE,TRUE,0);
gtk_widget_show(status_bar);

//获得上下文的标识符
context_id = gtk_statusbar_get_context_id(GTK_STATUSBAR(status_bar),"Statusbar example");

button = gtk_button_new_with_label("push_item");
g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(push_item),GINT_TO_POINTER(context_id));
gtk_box_pack_start(GTK_BOX(vbox),button,TRUE,TRUE,2);
gtk_widget_show(button);

button = gtk_button_new_with_label("pop last item");
g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(pop_item),GINT_TO_POINTER(context_id));
gtk_box_pack_start(GTK_BOX(vbox),button,TRUE,TRUE,2);
gtk_widget_show(button);

gtk_widget_show_all(window);
gtk_main();
return FALSE;
}

文本输入构件 Text Entries

文本输入构件(Entry widget)允许在一个单行文本框里输入和显示一行文本。文本可以用函数进行操作，如将新的文本替换、前插、追加到文本输入构件的当前内容中。

[cpp]
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/*File:text_entry.c
*Date:2013-12-28
*Author:sjin
*Mail:413977243@qq.com
*/

#include<gtk/gtk.h>
#include <stdio.h>
#include <stdlib.h>

static GtkWidget* entry1;
static GtkWidget* entry2;

void on_button_clicked (GtkWidget* button,gpointer data)
{
/*void gtk_entry_set_text(Gtk_Entry *entry,const gchr *text)
* 将新的内容取代文本输入构件当前的内容。
*const gchar *gtk_entry_get_text(GtkEntry *entry)
* 获得当前文本输入构件的内容
*/
if((int)data == 1){
gtk_entry_set_text(GTK_ENTRY(entry1),"");
gtk_entry_set_text(GTK_ENTRY(entry2),"");
} else if ((int)data == 2){
const gchar* username = gtk_entry_get_text(GTK_ENTRY(entry1));
const gchar* password = gtk_entry_get_text(GTK_ENTRY(entry2));
g_print("用户名是：%s",username);
g_print("\n");
g_print("密码是：%s\n",password);
} else if((int)data == 3){
/*改变文本空的可编辑状态*/
gtk_editable_set_editable(GTK_EDITABLE(entry1),GTK_TOGGLE_BUTTON(button)->active);
gtk_editable_set_editable(GTK_EDITABLE(entry2),GTK_TOGGLE_BUTTON(button)->active);
}
}

int main(int argc,char* argv[])
{
GtkWidget* window;
GtkWidget* box;
GtkWidget* box1;
GtkWidget* box2;
GtkWidget* box3;
GtkWidget* label1;
GtkWidget* label2;
GtkWidget* button;
GtkWidget* sep;
//初始化
gtk_init(&argc,&argv);
//设置窗口
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(G_OBJECT(window),"destroy",G_CALLBACK(gtk_main_quit),NULL);
gtk_window_set_title(GTK_WINDOW(window),"登录窗口");
gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER);
gtk_container_set_border_width(GTK_CONTAINER(window),20);

box = gtk_vbox_new(FALSE,0);
gtk_container_add(GTK_CONTAINER(window),box);
box1 = gtk_hbox_new(FALSE,0);
gtk_box_pack_start(GTK_BOX(box),box1,FALSE,FALSE,5);
box2 = gtk_hbox_new(FALSE,0);
gtk_box_pack_start(GTK_BOX(box),box2,FALSE,FALSE,5);
sep = gtk_hseparator_new();//分割线
gtk_box_pack_start(GTK_BOX(box),sep,FALSE,FALSE,5);
box3 = gtk_hbox_new(FALSE,0);
gtk_box_pack_start(GTK_BOX(box),box3,TRUE,TRUE,5);


label1 = gtk_label_new("用户名：");
entry1 = gtk_entry_new();
gtk_box_pack_start(GTK_BOX(box1),label1,FALSE,FALSE,5);
gtk_box_pack_start(GTK_BOX(box1),entry1,FALSE,FALSE,5);

label2 = gtk_label_new("密 码：");
entry2 = gtk_entry_new();
/*设置输入文本不可见*/
gtk_entry_set_visibility(GTK_ENTRY(entry2),FALSE);
gtk_box_pack_start(GTK_BOX(box2),label2,FALSE,FALSE,5);
gtk_box_pack_start(GTK_BOX(box2),entry2,FALSE,FALSE,5);

button = gtk_check_button_new_with_label("Editable");
g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(on_button_clicked),(gpointer)3);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button),TRUE);
gtk_box_pack_start(GTK_BOX(box3),button,TRUE,TRUE,10);
gtk_widget_show(button);

button = gtk_button_new_with_label("清空");
g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(on_button_clicked),(gpointer)1);
gtk_box_pack_start(GTK_BOX(box3),button,TRUE,TRUE,10);
gtk_widget_show(button);

button = gtk_button_new_with_label("确认");
g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(on_button_clicked),(gpointer)2);
g_signal_connect_swapped(G_OBJECT(button),"clicked",G_CALLBACK(gtk_widget_destroy),window);
gtk_box_pack_start(GTK_BOX(box3),button,TRUE,TRUE,5);
gtk_widget_show(button);


gtk_widget_show_all(window);
gtk_main();
return FALSE;
}

组合框 Combo Box

组合框(combo box)是另一个很简单的构件，实际上它仅仅是其它构件的集合。从用户的观点来说，这个构件是由一个文本输入构件和一个下拉菜单组成的，用户可以从一个预先定义的列表里面选择一个选项，同时，用户也可以直接在文本框里面输入文本.

[cpp]
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#include <gtk/gtk.h>

void callback(GtkWidget *button,gpointer data)
{
printf("组合框发生改变\n");
if((int)data == 1){
gchar *ptr = gtk_entry_get_text(GTK_ENTRY(button));
printf("组合框A发生改变，内容是：%s\n",ptr);
}else if((int)data == 2) {
gchar *ptr = gtk_entry_get_text(GTK_ENTRY(button));
printf("组合框A发生改变，内容是：%s\n",ptr);
}
}
GtkWidget *create_item (gint i)
{
GtkWidget *item;
GtkWidget *label;
GtkWidget *hbox;
GtkWidget *image;
hbox = gtk_hbox_new(FALSE,0);
switch(i){
case 1:
image = gtk_image_new_from_stock(GTK_STOCK_YES,GTK_ICON_SIZE_MENU);
label = gtk_label_new("列表项一");
break;
case 2:
image = gtk_image_new_from_stock(GTK_STOCK_NO,GTK_ICON_SIZE_MENU);
label = gtk_label_new("列表项二");
break;
case 3:
image = gtk_image_new_from_stock(GTK_STOCK_HELP,GTK_ICON_SIZE_MENU);
label = gtk_label_new("列表项三");
break;
case 4:
image = gtk_image_new_from_stock(GTK_STOCK_OK,GTK_ICON_SIZE_MENU);
label = gtk_label_new("列表项四");
break;
case 5:
image = gtk_image_new_from_stock(GTK_STOCK_CANCEL,GTK_ICON_SIZE_MENU);
label = gtk_label_new("列表项五");
break;
}
gtk_box_pack_start(GTK_BOX(hbox),image,FALSE,FALSE,2);
gtk_box_pack_start(GTK_BOX(hbox),label,FALSE,FALSE,2);
item = gtk_list_item_new();
gtk_container_add(GTK_CONTAINER(item),hbox);
gtk_widget_show_all(item);
return item;
}
int main(int argc,char* argv[])
{
GtkWidget *window;
GtkWidget *combo;
GtkWidget *label;
GtkWidget *vbox;
GList *items = NULL;
GtkWidget *item;
items =g_list_append(items,"列表项A");
items =g_list_append(items,"列表项B");
items =g_list_append(items,"列表项C");
items =g_list_append(items,"列表项D");
items =g_list_append(items,"列表项E");
gtk_init(&argc,&argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(gtk_main_quit),NULL);
gtk_window_set_title(GTK_WINDOW(window),"下拉列表框");
gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER);
gtk_container_set_border_width(GTK_CONTAINER(window),20);

vbox = gtk_vbox_new(FALSE,0);
gtk_container_add(GTK_CONTAINER(window),vbox);
label = gtk_label_new("组合框A");
gtk_box_pack_start(GTK_BOX(vbox),label,FALSE,FALSE,5);
combo = gtk_combo_new();
gtk_box_pack_start(GTK_BOX(vbox),combo,FALSE,FALSE,5);
gtk_combo_set_popdown_strings(GTK_COMBO(combo),items);
g_signal_connect(G_OBJECT(GTK_COMBO(combo)->entry),"changed",G_CALLBACK(callback),(gpointer)1);

/************************另一种创建的方式******************************/
label = gtk_label_new("组合框B");
gtk_box_pack_start(GTK_BOX(vbox),label,FALSE,FALSE,5);
combo = gtk_combo_new();
gtk_box_pack_start(GTK_BOX(vbox),combo,FALSE,FALSE,5);
item = create_item(1);
gtk_combo_set_item_string(GTK_COMBO(combo),GTK_ITEM(item),"项目一");
gtk_container_add(GTK_CONTAINER(GTK_COMBO(combo)->list),item);
item = create_item(2);
gtk_combo_set_item_string(GTK_COMBO(combo),GTK_ITEM(item),"项目二");
gtk_container_add(GTK_CONTAINER(GTK_COMBO(combo)->list),item);
item = create_item(3);
gtk_combo_set_item_string(GTK_COMBO(combo),GTK_ITEM(item),"项目三");
gtk_container_add(GTK_CONTAINER(GTK_COMBO(combo)->list),item);
item = create_item(4);
gtk_combo_set_item_string(GTK_COMBO(combo),GTK_ITEM(item),"项目四");
gtk_container_add(GTK_CONTAINER(GTK_COMBO(combo)->list),item);
item = create_item(5);
gtk_combo_set_item_string(GTK_COMBO(combo),GTK_ITEM(item),"项目五");
gtk_container_add(GTK_CONTAINER(GTK_COMBO(combo)->list),item);
g_signal_connect(G_OBJECT(GTK_COMBO(combo)->entry),"changed",G_CALLBACK(callback),(gpointer)2);

gtk_widget_show_all(window);
gtk_main();
return FALSE;
}

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