GTK<读取文件进度条>

#include <gtk/gtk.h>

#include <stdio.h>

#include <string.h>

#include <windows.h>

#define FILE_READ_PATH "F:/123.txt"

static float read_len = 0.0;

gboolean update_progress_bar(gpointer data);

int main(int argc,char *argv[])

{

GtkWidget *window,*vbox,*pbar;

gtk_init(NULL,NULL);

window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER);

gtk_window_set_title(GTK_WINDOW(window),"Process bar");

gtk_window_set_default_size(GTK_WINDOW(window),300,250);

vbox = gtk_vbox_new(FALSE,0);

gtk_container_add(GTK_CONTAINER(window),vbox);

pbar = gtk_progress_bar_new();

gtk_box_pack_start(GTK_BOX(vbox),pbar,FALSE,FALSE,50);

g_timeout_add(100,update_progress_bar,pbar);

g_signal_connect(window,"destroy",G_CALLBACK(gtk_main_quit),NULL);

gtk_widget_show_all(window);

gtk_main();

return 0;

}

gboolean update_progress_bar(gpointer data)

{

FILE *fp = NULL;

//FILE *fwp = NULL;

char buff[8] = {0};

gint size = 10,file_len = 0;

unsigned char *pbuff;

GtkProgressBar *pbar = (GtkProgressBar *)data;

if((fp = fopen(FILE_READ_PATH,"r")) == NULL)

{

return 0;

}

/*if((fwp = fopen("F:/kang.txt","ab")) == NULL)

{

return 0;

}*/

fseek(fp,0,SEEK_END);

file_len = ftell(fp);

pbuff = (unsigned char *)malloc((size+1)*sizeof(unsigned char));

memset(pbuff,0,size*sizeof(unsigned char));

if(read_len <= file_len)

{

fseek(fp,(long int)read_len,SEEK_SET);

fread(pbuff,sizeof(unsigned char),size,fp);

/* fwrite(pbuff,size*sizeof(unsigned char),1,fwp);*/

gtk_progress_bar_set_fraction(pbar,read_len/file_len);

sprintf(buff,"%d%s",(int)((read_len/file_len)*100),"%");

gtk_progress_bar_set_text(GTK_PROGRESS_BAR(pbar),buff);

read_len += size;

return TRUE;   //必须返回TRUE;

}

if(read_len > file_len)

{

gtk_main_quit();

return TRUE;

}

fclose(fp);

/*fclose(fwp);*/

free(pbuff);

return TRUE;     //必须返回TRUE;

}