sample4_4.c

CVI教程,用于信号采集系统的多任务开发软件.学习简单,功能实用.

#include <ansi_c.h>
#include <cvirte.h>		/* Needed if linking in external compiler; harmless otherwise */
#include <userint.h>
#include "sample4_4.h"

static int panelHandle;
char pass1[15],pass2[15];
char maskKey;
int getPassword(char *buf,int eventData1,int *peventData2) ;

int main (int argc, char *argv[])
{
	if (InitCVIRTE (0, argv, 0) == 0)	/* Needed if linking in external compiler; harmless otherwise */
		return -1;	/* out of memory */
	if ((panelHandle = LoadPanel (0, "sample4_4.uir", PANEL)) < 0)
		return -1;
	DisplayPanel (panelHandle);
	GetCtrlVal (panelHandle, PANEL_RING, &maskKey);  
	RunUserInterface ();
	return 0;
}
//callback of text box for confirm password 
int CVICALLBACK password2 (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_KEYPRESS:
			return getPassword(pass2,eventData1,&eventData2);  
	}
	return 0;
}
//callback of text box for password     
int CVICALLBACK password1 (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_KEYPRESS:
			return getPassword(pass1,eventData1,&eventData2);
    }                                                                                 
	return 0; 
}

int CVICALLBACK Exit (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_COMMIT:
			QuitUserInterface (0);
			break;
	}
	return 0;
}

int CVICALLBACK mask (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_COMMIT:
			GetCtrlVal (panelHandle, PANEL_RING, &maskKey); 
			break;
	}
	return 0;
}
//callback of confirm button
int CVICALLBACK Compare (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	char buf1[100],*buf2;
	char temp1[]={"your input is right"},temp2[]={"your input is wrong"};
	int flagError=0;
	
	switch (event)
	{
		case EVENT_COMMIT:  
			if(strcmp(pass1,pass2)==0)
			{
			buf2=temp1;
			flagError=0;
			}
			else
			{
			buf2=temp2;
			flagError=1;
			}
			sprintf(buf1,"The password you input is %s,\nthe confirm password is %s,\n%s",pass1,pass2,buf2);
			MessagePopup("Message Box",buf1);
			if(flagError==0)
			   QuitUserInterface (0);     
			else
			{
			   pass1[0]='\0';
			   pass2[0]='\0';
			   SetCtrlVal (panelHandle, PANEL_STRING1, "");
			   SetCtrlVal (panelHandle, PANEL_STRING2, "");   
			}
			break;
	}
	return 0;
}
//set text box mask function  
int getPassword(char *buf,int eventData1,int *peventData2)
{
    char asciiCode;
    int virtualKey;         /* cursor keys, function keys, esc, enter, etc.. are virtual keys */
    int swallowEvent = 0;   /* 0 means DO NOT swallow (ignore) the event, only mouse and key event can be swallowed */
    int len; 
    char temp[2]={""};
    asciiCode = eventData1 & VAL_ASCII_KEY_MASK;    /* key masks are defined in userint.h */
    virtualKey = eventData1 & VAL_VKEY_MASK;
    

    /*  if the key was an ascii key and the menukey (ctrl on the PC) was not pressed */
    if (asciiCode != 0 && (eventData1 & VAL_MENUKEY_MODIFIER) == 0)
    {   
    	//set the max length of password
    	len=strlen(buf); 
    	if(len>10)
        	return 1; //swallow the event
        temp[0]=asciiCode;	
        strcat(buf,temp);                                                       
        (**(int **)peventData2) = maskKey;   
    }                                                                                 
    else                                                                              
    if (virtualKey > 0)  /* check for and swallow cursor key events */                
    {                                                                                 
        switch (virtualKey)                                                           
        {                                                                             
            case VAL_UP_ARROW_VKEY:                                                   
            case VAL_DOWN_ARROW_VKEY:                                                 
            case VAL_LEFT_ARROW_VKEY:                                                 
            case VAL_RIGHT_ARROW_VKEY:                                                
            case VAL_HOME_VKEY:                                                       
            case VAL_END_VKEY:                                                        
           		 swallowEvent = 1;                                                    
            	 break;                                                               
            case VAL_BACKSPACE_VKEY:                                                       
                 len=strlen(buf);                                                     
                 if(len>0)                                                            
                 	buf[len-1]='\0';
                 break;                                                               
        }                                                                             
    }                                                                                 
	 return swallowEvent; 
}