sample4_5.c

本文件是ni公司的labwindows/cvi软件的部分例子和源程序

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

void GenerateGUI(void);
int CVICALLBACK GenerateData (int panelHandle,
          int controlID, int event, void *callbackData, int
          eventData1, int eventData2);
int CVICALLBACK Shutdown (int panelHandle,
          int controlID, int event, void *callbackData, int
          eventData1, int eventData2); 
void CVICALLBACK MGenerateData ( int menuBarHandle,
         int menuItemID, void *callbackData, int panelHandle );
void CVICALLBACK MExit ( int menuBarHandle,
         int menuItemID, void *callbackData, int panelHandle );
int CVICALLBACK PanelCallback (int panelHandle,
			int event, void *callbackData, int eventData1, int eventData2);


int handle,Generate, randomNum, ExitButton,MenuBar,Menu,SubMenu,MenuItem;  

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 */
    
    GenerateGUI();
    DisplayPanel (handle);
    RunUserInterface();	   
    return 0;
}
//generate user interface
void GenerateGUI()
{  
    handle = NewPanel (0, "sample4_5", 50, 50, 150, 200);  
    SetPanelAttribute (handle, ATTR_CAN_MAXIMIZE, 0);
	SetPanelAttribute (handle, ATTR_SIZABLE, 0);  
	InstallPanelCallback (handle,PanelCallback, 0);

    Generate = NewCtrl (handle, CTRL_SQUARE_COMMAND_BUTTON, "Generate Data",70, 70);
    InstallCtrlCallback (handle, Generate, GenerateData, 0);

    ExitButton = NewCtrl (handle, CTRL_PICTURE_COMMAND_BUTTON,"", 120, 150);
    InstallCtrlCallback (handle, ExitButton, Shutdown, 0);
	SetCtrlAttribute (handle, ExitButton, ATTR_HEIGHT, 25);
	SetCtrlAttribute (handle, ExitButton, ATTR_WIDTH, 40);
	SetCtrlAttribute (handle,ExitButton, ATTR_FIT_MODE,  VAL_SIZE_TO_PICTURE);
    SetCtrlAttribute (handle, ExitButton, ATTR_IMAGE_FILE, "exit.pcx");

    SetPanelAttribute (handle, ATTR_CLOSE_CTRL, ExitButton);         

    randomNum = NewCtrl (handle, CTRL_NUMERIC, "Random Number", 40, 70);
    SetCtrlAttribute (handle, randomNum, ATTR_CTRL_MODE, VAL_INDICATOR);
			
    MenuBar=NewMenuBar (handle);
	Menu = NewMenu (MenuBar, "__Tool", -1);
	MenuItem=NewMenuItem (MenuBar, Menu, "__Next", -1, 0, 0, 0);  
	SubMenu=NewSubMenu(MenuBar, MenuItem);
	NewMenuItem (MenuBar, SubMenu, "__Generate Data", -1, 0, MGenerateData, 0);
	NewMenuItem (MenuBar,SubMenu,"__Exit",0,VAL_MENUKEY_MODIFIER|'X',MExit,0); 
}
//Menu Generate Data callback fun 
void CVICALLBACK MGenerateData ( int menuBarHandle,
         int menuItemID, void *callbackData, int panelHandle )
{
    double random_val;
    random_val = rand()/32767.0 * 100.0;
    SetCtrlVal (panelHandle , randomNum, random_val);
}
//Menu exit callback fun
void CVICALLBACK MExit( int menuBarHandle,
         int menuItemID, void *callbackData, int panelHandle )
{
	QuitUserInterface(0);   
}
//button callback
int CVICALLBACK GenerateData (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    double random_val;

    if (event == EVENT_COMMIT) {
        random_val = rand()/32767.0 * 100.0;
        SetCtrlVal (panel, randomNum, random_val);
        }
    return(0);
}
//exit button callback
int CVICALLBACK Shutdown (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)
{
    if (event == EVENT_COMMIT)
        QuitUserInterface(0);
    return(0);
}
//panel callback
int CVICALLBACK PanelCallback (int panel, int event, void *callbackData, int eventData1, int eventData2)
{
	if(event==EVENT_RIGHT_CLICK)
	   MessagePopup("Message","You right click the panel!"); 
	return 0;
}