sample2_2.c

本文件是ni公司的labwindows/cvi软件的部分例子和源程序

#include <userint.h>
#include <analysis.h>
#include <ansi_c.h>
#include "sample2_2.h"

int handle;		 //panel handle
void GenerateWave (int ,double[],double); 
int trace_color=0/*black*/, shape=0/*sin*/;  //color ,shap
double datapoints[100];  //wave data point
double wavepeak=60; 		 //wave peak
void DisplayChart(void);      
int main(int argc, char *argv[])
{
    if (InitCVIRTE (0, argv, 0) == 0)   /* Initialize CVI libraries */
        return (-1);    /* out of memory */
    //Load main panel    
    if ((handle = LoadPanel (0, "sample2_2.uir", PANEL)) < 0)
        return -1;
    //Display main panel
    DisplayPanel (handle);
    //init shape ,peak,color
	//set wave shape 
	SetCtrlVal (handle, PANEL_WFM, shape);                                 
    //set wave peak                                                         
	SetCtrlVal (handle, PANEL_NUMERICSLIDE, wavepeak);             		
    //set wave color                                                        
    SetCtrlVal (handle, PANEL_COLOR, trace_color);                         
    
    //go into the message loop,waiting user interface event
    RunUserInterface ();
        
    return 0;       
}
//call back function of  get wave button
int CVICALLBACK Display(int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    if (event == EVENT_COMMIT) 
   		DisplayChart();       
    return(0);
}	 
//call back function of quit button
int CVICALLBACK Quit(int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    switch(event)
    {
    case EVENT_COMMIT:
        QuitUserInterface(0);
    break;
    }
    return(0);
}
//call back function of peak numeric control
int CVICALLBACK NumericPeak (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{

	switch (event)
		{
		case EVENT_COMMIT:	
		    //get wave peak                                                         
			GetCtrlVal (handle, PANEL_NUMERICSLIDE, &wavepeak);             		
			DisplayChart(); 
			break;
		}
	return 0;
}
//call back function of color selection control
int CVICALLBACK Getcolor (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
		{
		case EVENT_COMMIT:
		    //get wave color                                                        
		    GetCtrlVal (handle, PANEL_COLOR, &trace_color);                         
			DisplayChart();
			break;
		}
	return 0;
}
//call back of  wave shap selection  ring slider
int CVICALLBACK GetWFM (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
		{
		case EVENT_COMMIT:
			//get wave shape 
			GetCtrlVal (handle, PANEL_WFM, &shape); 
			DisplayChart()   ;
			break;
		}
	return 0;
}
//call back function of clear wave
int CVICALLBACK ClearWave (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
		{
		case EVENT_COMMIT:
  			 //clear old wave
    		DeleteGraphPlot (handle, PANEL_GRAPH, -1, 1);  
    		break;
		}
	return 0;
}
void DisplayChart()
{
switch (shape) {                                                		            
    case 0 :                                                    		            
        GenerateWave (1,datapoints,wavepeak);                   		            
        break;                                                  		            
    case 1 :                                                    		            
        GenerateWave (2,datapoints,wavepeak);                   		            
        break;                                                  		            
    case 2 :                                                    		            
        GenerateWave (3,datapoints,wavepeak);                   		            
        break;                                                  		            
    case 3 :                                                    		            
        GenerateWave (4,datapoints,wavepeak);                   		            
        break;                                                  		            
    }                                                           		    
//clear old wave                                                		    
DeleteGraphPlot (handle, PANEL_GRAPH, -1, 1);                   		            
//plot new wave                                                 		    
PlotY (handle, PANEL_GRAPH, datapoints, 100, VAL_DOUBLE,        		            
   VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, trace_color);
}