LabWindows/CVI虚拟仪器设计技术基本控件使用之：Ring 箭头设置

（2）程序源代码

//头文件声明  

#include <cvirte.h>     

#include <userint.h>    

#include "Ring 箭头设置.h"      

static int panelHandle; //主函数  

int main (int argc, char *argv[])  

{  

if (InitCVIRTE (0, argv, 0) == 0)  

return –1; /* out of memory */ if ((panelHandle = LoadPanel (0, "Ring 箭头设置.uir", PANEL)) < 0)      

return –1;   

DisplayPanel (panelHandle);     

RunUserInterface ();    

DiscardPanel (panelHandle);     

return 0;  

} //面板回调函数  

int CVICALLBACK PanelCB (int panel, int event, void *callbackData,      

int eventData1, int eventData2)     

{  

switch (event)      

{  

case EVENT_CLOSE:  

QuitUserInterface (0);      

break;

}  

return 0;  

}

?//Ring 控件

int CVICALLBACK arrow (int panel, int control, int event,    

void *callbackData, int eventData1, int eventData2)      

{ //定义箭头的宽度或高度   

int style; //定义箭头的数值

int value;  

switch (event)  

{    

case EVENT_COMMIT: 

// 判断设置箭头的宽度或高度

GetCtrlVal (panelHandle, PANEL_BINARYSWITCH, &style);

// 当设置箭头属性为宽度时  

if (style == 0)      

{ // 判断响应哪一控件事件  

switch (control)   

{ // 普通Ring 控件 

case PANEL_RING_PLAIN: 

GetCtrlVal (panelHandle, control, &value);  

SetCtrlAttribute (panel, control, 20472, value);     

break; 

//Menu Ring 控件   

case PANEL_RING_MENU:  

GetCtrlVal (panelHandle, control, &value);  

SetCtrlAttribute (panel, control, 20475, value);     

break; 

//Recessed Menu Ring 控件  

case PANEL_RING_RECESSEDMENU:  

GetCtrlVal (panelHandle, control, &value);  

SetCtrlAttribute (panel, control, 20475, value);     

break; 

//Popup Menu Ring 控件 

case PANEL_RING_POPUPMENU: 

GetCtrlVal (panelHandle, control, &value);  

SetCtrlAttribute (panel, control, 20475, value);     

break; 

}  

} // 当设置箭头属性为高度时

else   

{ // 普通Ring 控件不能设置高度属性 

if (control != PANEL_RING_PLAIN)   

?        {      

            GetCtrlVal (panelHandle, control, &value);  

            SetCtrlAttribute (panel, control, 20476, value);     

        }      

        }      

        break;     

    }            

    return 0;            

}