sample4_2.c

本文件是ni公司的labwindows/cvi软件的部分例子和源程序

#include <formatio.h>
#include <utility.h>
#include <ansi_c.h>
#include <cvirte.h>		/* Needed if linking in external compiler; harmless otherwise */
#include <userint.h>
#include "sample4_2.h"

static int panelHandle;
int Display_all=1;  //switch init on ,display all event message except timer event
int IsClickCtrl (int panel, int control, int x, int y)  ;
void AppendTextClick (char* event_gen, int eventDat1, int eventDat2)    ;
void AppendText (char* event_gen)  ;

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_2.uir", PANEL)) < 0)
		return -1;
	DisplayPanel (panelHandle);
	RunUserInterface ();
	return 0;
}
//callback fun of switch control
int CVICALLBACK Switch (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{   
    switch (event) {
        case EVENT_LEFT_CLICK :
            AppendTextClick("选择开关   左键单击", eventData1, eventData2);
            break;
        case EVENT_RIGHT_CLICK :
            AppendTextClick("选择开关    右键单击", eventData1, eventData2);
            break;
        case EVENT_LEFT_DOUBLE_CLICK :
            AppendTextClick("选择开关    左键双击 ", eventData1, eventData2);
            break;
        case EVENT_RIGHT_DOUBLE_CLICK :
            AppendTextClick("选择开关    右键双击", eventData1, eventData2);
            break;
        case EVENT_GOT_FOCUS :
            AppendText("选择开关    获得焦点");
            break;
        case EVENT_LOST_FOCUS :
            AppendText("选择开关    失去焦点");
            break;
        case EVENT_VAL_CHANGED :
            AppendText("选择开关    值变化");
            break;
        case EVENT_COMMIT :
        	GetCtrlVal (panelHandle, PANEL_SWITCH, &Display_all);    
            AppendText("选择开关    状态切换");
            break;
        }
        
	return 0;
}
//callback of exit button
int CVICALLBACK Exit (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_COMMIT:
			QuitUserInterface (0);
			break;
		case EVENT_GOT_FOCUS :
            AppendText("结束按纽    获得焦点");
            break;
        case EVENT_LOST_FOCUS :
            AppendText("结束按纽    失去焦点");
            break;		 
	}
	return 0;
}
//callback of timer event
int CVICALLBACK TimeFun (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	int x, y, left, right, keys, panelX, panelY, ctrlX, ctrlY;
	int rect_top,rect_left,height,width;
    char coords[50];
    switch (event) 
    {
        case EVENT_TIMER_TICK:
            /* Report global coords and button / key states */ 
            GetGlobalMouseState (NULL, &x, &y, &left, &right, &keys);
            SetCtrlVal (panel, PANEL_LEFT, left);
            SetCtrlVal (panel, PANEL_RIGHT, right);
            sprintf (coords, "(x=%ld,y=%ld)", x, y);
            SetCtrlVal (panel, PANEL_Absolute, coords);
            SetCtrlVal (panel, PANEL_SHIFT, keys & VAL_SHIFT_MODIFIER);
            SetCtrlVal (panel, PANEL_CTRL, keys & VAL_MENUKEY_MODIFIER);  
            /* Report coords relative to panel */
            GetRelativeMouseState (panel, 0, &panelX, &panelY, NULL,
                                   NULL, NULL);
            sprintf (coords, "(x=%ld,y=%ld)", panelX, panelY);
            SetCtrlVal (panel, PANEL_Raletive_Panel, coords);
            /* Report coords relative to help button */
            GetRelativeMouseState (panel, PANEL_MESSAGEBOX, &ctrlX, &ctrlY, NULL,
                                   NULL, NULL);
            sprintf (coords, "(x=%ld,y=%ld)", ctrlX, ctrlY);
            SetCtrlVal (panel, PANEL_Raletive_List, coords);
            /* Change mouse cursor if we are over panel or MESSAGELIST, */
            /* and this panel is the active panel.                      */
            if (GetActivePanel() == panel)
            {
                if (IsClickCtrl (panel, 0, panelX, panelY)) 
                {
                    if (IsClickCtrl (panel, PANEL_MESSAGEBOX, ctrlX, ctrlY))
                        SetMouseCursor (VAL_OPEN_HAND_CURSOR);
                    else            
						SetMouseCursor (VAL_CROSS_HAIR_CURSOR );
                        
                }
                else
                    SetMouseCursor (VAL_DEFAULT_CURSOR);
            }
            else
                SetMouseCursor (VAL_DEFAULT_CURSOR);   
            //Display timer exent
            if(Display_all==0)
            	AppendText("定时器时间到");    
			break;
	}
	return 0;
}
//panel callback
int CVICALLBACK panel (int panel, int event, void *callbackData,
		int eventData1, int eventData2)
{
    char keypushed[100];
    switch (event) {
        case EVENT_LEFT_CLICK :	   
            AppendTextClick("面板    左键单击", eventData1, eventData2);
            break;
        case EVENT_RIGHT_CLICK :
            AppendTextClick("面板    右键单击", eventData1, eventData2);
            break;
        case EVENT_LEFT_DOUBLE_CLICK :
            AppendTextClick("面板    左键双击", eventData1, eventData2);
            break;
        case EVENT_RIGHT_DOUBLE_CLICK :
            AppendTextClick("面板    右键双击", eventData1, eventData2);
            break;
        case EVENT_KEYPRESS :
            SetCtrlVal (panelHandle, PANEL_SHIFT,  eventData1 & VAL_SHIFT_MODIFIER);
            SetCtrlVal (panelHandle, PANEL_CTRL,  eventData1 & VAL_MENUKEY_MODIFIER);  
            if ((eventData1 & VAL_ASCII_KEY_MASK) != 0){
                sprintf (keypushed, "键盘  %c 按下 \n", eventData1);
                SetCtrlVal (panelHandle, PANEL_MESSAGEBOX, keypushed);
            }
            break;
        case EVENT_PANEL_SIZE :
            AppendText("面板    改变大小");
            break;
        case EVENT_PANEL_MOVE :
            AppendText("面板    移动");
            break;
        case EVENT_CLOSE :
            AppendText("面板    关闭");
            break;
        }

	return 0;
}
//determine whether the mouse is on control
int IsClickCtrl (int panel, int control, int x, int y)
{
    int height, width;
    if ((x < 0) || (y < 0))
        return 0;
    if (control == 0) 
    {
        GetPanelAttribute (panel, ATTR_HEIGHT, &height);
        GetPanelAttribute (panel, ATTR_WIDTH, &width);
    }
    else 
    {
        GetCtrlAttribute (panel, control, ATTR_HEIGHT, &height);
        GetCtrlAttribute (panel, control, ATTR_WIDTH, &width);
    }
    if ((y < height) && (x < width))
        return 1;
    else
        return 0;
}
//add message to text box
void AppendTextClick (char* event_gen, int eventDat1, int eventDat2)
{
    char buf[100];
    
    Fmt(buf, "%s<%s  Y 坐标= %i,  X 坐标= %i\n",event_gen, eventDat1, eventDat2);
    SetCtrlVal (panelHandle, PANEL_MESSAGEBOX, buf);
}

void AppendText (char* event_gen)
{
    char buf[100];

    Fmt(buf, "%s<%s\n", event_gen);
    SetCtrlVal (panelHandle, PANEL_MESSAGEBOX, buf);
}