callbacks.c

Linux下的具有图形界面的小通讯录

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <gtk/gtk.h>

#include "stdio.h"
#include "string.h"
#include "callbacks.h"
#include "interface.h"
#include "support.h"

/*定义状态栏提示显示时间，单位：毫秒*/
#define INTERVAL 5000

/*定义变量*/
int id=0;
int fanwei=0;

GtkWidget *entry1;
GtkWidget *entry2;
GtkWidget *entry3;
GtkWidget *entry4;
GtkWidget *clist;
GtkWidget *clist_chaxun;
GtkWidget *entry_guanjianci;
GtkWidget *jiansuo_fanwei;
GtkWidget *statusbar;
GtkWidget *error;
GtkWidget *file_error;

char *guanjianci="";
int msgid_i;
int msgid_s;
int msgid_d;
int msgid_n;
int msgid_j;

int timeout;

/*定义数据结构体*/
struct data
{
char data_1[50];
char data_2[50];
char data_3[50];
char data_4[50];
};

gint timeout_callback(gpointer data)
{
/*销毁状态栏过期的提示*/	
gtk_statusbar_pop(GTK_STATUSBAR(statusbar),msgid_i);
gtk_statusbar_pop(GTK_STATUSBAR(statusbar),msgid_s);
gtk_statusbar_pop(GTK_STATUSBAR(statusbar),msgid_d);
gtk_statusbar_pop(GTK_STATUSBAR(statusbar),msgid_j);	
guint j=gtk_statusbar_push(GTK_STATUSBAR(statusbar),msgid_n,"准备就绪！      测试数据库V1.0    作者：孙新贺");	
return;
}

void 
file_to_clist()
{
/*从文件中读取数据以显示在CLIST中*/	
gtk_clist_clear(GTK_CLIST(clist));
FILE *fp_r;
	if((fp_r=fopen("data.md","rb"))==NULL)
		{
		/*显示文件错误信息*/
		file_error = create_file_error ();
 		gtk_widget_show (file_error);
		return;
		}
struct data data_out;
/*查询记录个数，返回的i为记录个数＋1*/
	int i=0;
	while(!feof(fp_r))
		{
		fread(&data_out,sizeof(struct data),1,fp_r);
		i=i+1;
		}
	rewind(fp_r);
/*根据记录个数取记录，个数为i-1*/
	int j=0;
while(j<=i-2)
		{
		fread(&data_out,sizeof(struct data),1,fp_r);
		gchar *list[4]={"","","",""};
		list[0]=data_out.data_1;
		list[1]=data_out.data_2;
		list[2]=data_out.data_3;
		list[3]=data_out.data_4;
		gtk_clist_append (GTK_CLIST (clist), list);
		j++;
		}
fclose(fp_r);
}

gboolean
on_window1_delete_event                (GtkWidget       *widget,
                                        GdkEvent        *event,
                                        gpointer         user_data)
{
gtk_main_quit();
  return FALSE;
}


void
on________q_1_activate                 (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
gtk_main_quit();
	return FALSE;
}


void
on_about1_activate                     (GtkMenuItem     *menuitem,
                                        gpointer         user_data)
{
GtkWidget *aboutdialog1;
aboutdialog1 = create_aboutdialog1 ();
 gtk_widget_show (aboutdialog1);
}



void
on_save_clicked                        (GtkButton       *button,
                                        gpointer         user_data)
{
/* 更新需要修改的记录*/		
struct data  data_new;
		strcpy(data_new.data_1,gtk_entry_get_text(GTK_ENTRY(entry1)));
		strcpy(data_new.data_2,gtk_entry_get_text(GTK_ENTRY(entry2)));
		strcpy(data_new.data_3,gtk_entry_get_text(GTK_ENTRY(entry3)));
		strcpy(data_new.data_4,gtk_entry_get_text(GTK_ENTRY(entry4)));										
FILE *fp;
if((fp=fopen("data.md","rb+"))==NULL)
	{
	/*显示文件错误信息*/
	file_error = create_file_error ();
 	gtk_widget_show (file_error);	
	return;
	}
/*定位至主键值指向的记录*/
fseek(fp,id*sizeof(struct data),0);
if(fwrite(&data_new,sizeof(struct data),1,fp)!=1)
	{
	/*显示文件错误信息*/
	file_error = create_file_error ();
 	gtk_widget_show (file_error);		
	return;
	}
	fclose(fp);		
/* 刷新CLIST显示*/	
file_to_clist();	
/* 更新状态栏*/		
msgid_s=gtk_statusbar_get_context_id(GTK_STATUSBAR(statusbar),"");
guint j=gtk_statusbar_push(GTK_STATUSBAR(statusbar),msgid_s,"记录更新成功！");
gtk_timeout_remove(timeout);
timeout=gtk_timeout_add(INTERVAL,timeout_callback,NULL);
}


void
on_insert_clicked                      (GtkButton       *button,
                                        gpointer         user_data)
{
struct data data_f;	
	strcpy(data_f.data_1,gtk_entry_get_text(GTK_ENTRY(entry1)));
	strcpy(data_f.data_2,gtk_entry_get_text(GTK_ENTRY(entry2)));
	strcpy(data_f.data_3,gtk_entry_get_text(GTK_ENTRY(entry3)));
	strcpy(data_f.data_4,gtk_entry_get_text(GTK_ENTRY(entry4)));
/*将记录写入文件*/
FILE *fp;
	if((fp=fopen("data.md","ab"))==NULL)
	{
	/*显示文件错误信息*/
	file_error = create_file_error ();
 	gtk_widget_show (file_error);
	return;
	}
if(fwrite(&data_f,sizeof(struct data),1,fp)!=1)
	{
	/*显示文件错误信息*/
	file_error = create_file_error ();
 	gtk_widget_show (file_error);	
	return;
	}
	fclose(fp);
/* 刷新CLIST显示*/		
file_to_clist();
/* 更新状态栏*/		
msgid_i=gtk_statusbar_get_context_id(GTK_STATUSBAR(statusbar),"");
guint j=gtk_statusbar_push(GTK_STATUSBAR(statusbar),msgid_i,"记录成功添加！");
gtk_timeout_remove(timeout);
timeout=gtk_timeout_add(INTERVAL,timeout_callback,NULL);	
}


void
on_delete_clicked                      (GtkButton       *button,
                                        gpointer         user_data)
{
/* 将要删除的记录标记为空记录*/		
struct data  data_null;
		strcpy(data_null.data_1,"");
		strcpy(data_null.data_2,"");
		strcpy(data_null.data_3,"");
		strcpy(data_null.data_4,"");										
FILE *fp;
if((fp=fopen("data.md","rb+"))==NULL)
		{printf("the file open error!\n");
		return;
		}
fseek(fp,id*sizeof(struct data),0);
if(fwrite(&data_null,sizeof(struct data),1,fp)!=1)
	{
	/*显示文件错误信息*/
	file_error = create_file_error ();
 	gtk_widget_show (file_error);
	return;
	}
	fclose(fp);		
/* 刷新CLIST显示*/	
file_to_clist();	
/* 更新状态栏*/		
msgid_d=gtk_statusbar_get_context_id(GTK_STATUSBAR(statusbar),"");
guint j=gtk_statusbar_push(GTK_STATUSBAR(statusbar),msgid_d,"记录删除成功！");
gtk_timeout_remove(timeout);
timeout=gtk_timeout_add(INTERVAL,timeout_callback,NULL);
}


void
on_window1_show                        (GtkWidget       *widget,
                                        gpointer         user_data)
{
/*初始化程序：查询构件，给指针赋指向*/
entry1=lookup_widget(GTK_WIDGET(widget),"entry1");
entry2=lookup_widget(GTK_WIDGET(widget),"entry2");
entry3=lookup_widget(GTK_WIDGET(widget),"entry3");
entry4=lookup_widget(GTK_WIDGET(widget),"entry4");
entry_guanjianci=lookup_widget(GTK_WIDGET(widget),"entry_guanjianci");	
clist=lookup_widget(GTK_WIDGET(widget),"clist");		
clist_chaxun=lookup_widget(GTK_WIDGET(widget),"clist_chaxun");
jiansuo_fanwei=lookup_widget(GTK_WIDGET(widget),"jiansuo_fanwei");
statusbar=lookup_widget(GTK_WIDGET(widget),"statusbar");
/* 刷新CLIST显示*/							
file_to_clist();

/*初始化状态栏显示*/		
msgid_n=gtk_statusbar_get_context_id(GTK_STATUSBAR(statusbar),"");
guint j=gtk_statusbar_push(GTK_STATUSBAR(statusbar),msgid_n,"准备就绪！      测试数据库V1.0    作者：孙新贺");
}



void
on_clist_select_row                    (GtkCList        *clist,
                                        gint             row,
                                        gint             column,
                                        GdkEvent        *event,
                                        gpointer         user_data)
{
gchar *text;
gtk_clist_get_text (GTK_CLIST (clist), row, column, &text);
/*读出所选项目，并显示于第一部分*/
	FILE *fp_r;
	if((fp_r=fopen("data.md","rb"))==NULL)
	{
	/*显示文件错误信息*/
	file_error = create_file_error ();
 	gtk_widget_show (file_error);
	return;
	}
struct data data_out;
fseek(fp_r,row*sizeof(struct data),0);
fread(&data_out,sizeof(struct data),1,fp_r);
gtk_entry_set_text(GTK_ENTRY(entry1),&data_out.data_1);
gtk_entry_set_text(GTK_ENTRY(entry2),&data_out.data_2);
gtk_entry_set_text(GTK_ENTRY(entry3),&data_out.data_3);
gtk_entry_set_text(GTK_ENTRY(entry4),&data_out.data_4);
fclose(fp_r);
/*返回数据主键值*/
id=row;
}


void
on_jiansuo_fanwei_changed              (GtkComboBox     *combobox,
                                        gpointer         user_data)
{
gchar *c;
c=gtk_combo_box_get_active_text(combobox);
										
if (strcmp(c,"all")==0) fanwei=0;
else if(strcmp(c,"item1")==0) fanwei=1;
else if(strcmp(c,"item2")==0 ) fanwei=2;
else if(strcmp(c,"item3")==0 ) fanwei=3;
else fanwei=4;
}


void
on_search_clicked                      (GtkButton       *button,
                                        gpointer         user_data)
{
guanjianci=gtk_entry_get_text(GTK_ENTRY(entry_guanjianci));

if(strcmp(guanjianci,"")==0)
	{
	GtkWidget *error;
	error = create_error ();
 	gtk_widget_show (error);
	return;
	}
FILE *fp_r;
	if((fp_r=fopen("data.md","rb"))==NULL)
		{
		/*显示文件错误信息*/
		file_error = create_file_error ();
 		gtk_widget_show (file_error);
		return;
		}

struct data data_out;
/*查询记录个数，返回i为记录个数＋1*/
	int i=0;
	while(!feof(fp_r))
		{
		fread(&data_out,sizeof(struct data),1,fp_r);
		i=i+1;
		}
/*移动文件指针到文件头，准备搜索*/
	rewind(fp_r);
/*开始搜索：根据记录个数取记录，个数为i-1，沿文件方向进行线性搜索*/
	int j=0;
	gchar *list[4]={"","","",""};
	gtk_clist_clear(GTK_CLIST(clist_chaxun));
while(j<=i-2)
	{
		fread(&data_out,sizeof(struct data),1,fp_r);
	switch (fanwei)
		{
		case 0:
				if((strstr(data_out.data_1,guanjianci)||strstr(data_out.data_2,guanjianci)||strstr(data_out.data_3,guanjianci)||strstr(data_out.data_4,guanjianci))!=NULL)
					{
					list[0]=data_out.data_1;
					list[1]=data_out.data_2;
					list[2]=data_out.data_3;
					list[3]=data_out.data_4;
					gtk_clist_append (GTK_CLIST (clist_chaxun),list);
					}
				break;
		case 1:
				if(strstr(data_out.data_1,guanjianci)!=NULL)
					{
					list[0]=data_out.data_1;
					list[1]=data_out.data_2;
					list[2]=data_out.data_3;
					list[3]=data_out.data_4;
					gtk_clist_append (GTK_CLIST (clist_chaxun),list);
					}
				break;
		case 2:	
				if(strstr(data_out.data_2,guanjianci)!=NULL)
					{
					list[0]=data_out.data_1;
					list[1]=data_out.data_2;
					list[2]=data_out.data_3;
					list[3]=data_out.data_4;
					gtk_clist_append (GTK_CLIST (clist_chaxun),list);
					}
				break;
		case 3:
				if(strstr(data_out.data_3,guanjianci)!=NULL)
					{
					list[0]=data_out.data_1;
					list[1]=data_out.data_2;
					list[2]=data_out.data_3;
					list[3]=data_out.data_4;
					gtk_clist_append (GTK_CLIST (clist_chaxun),list);
					}
				break;
		case 4:
				if(strstr(data_out.data_4,guanjianci)!=NULL)
					{
					list[0]=data_out.data_1;
					list[1]=data_out.data_2;
					list[2]=data_out.data_3;
					list[3]=data_out.data_4;
					gtk_clist_append (GTK_CLIST (clist_chaxun),list);
					}
				break;
		}
	j++;
	}
fclose(fp_r);
/* 更新状态栏*/		
msgid_j=gtk_statusbar_get_context_id(GTK_STATUSBAR(statusbar),"");
guint t=gtk_statusbar_push(GTK_STATUSBAR(statusbar),msgid_j,"记录检索完成！");
gtk_timeout_remove(timeout);
timeout=gtk_timeout_add(INTERVAL,timeout_callback,NULL);

}


void
on_okbutton1_clicked                   (GtkButton       *button,
                                        gpointer         user_data)
{
error=lookup_widget(GTK_WIDGET(button),"error");						
gtk_widget_destroy(GTK_WIDGET(error));
}



void
on_button1_clicked                     (GtkButton       *button,
                                        gpointer         user_data)
{
file_error=lookup_widget(GTK_WIDGET(button),"file_error");
gtk_widget_destroy(GTK_WIDGET(file_error));
}