sample4_1.c

本文件是ni公司的labwindows/cvi软件的部分例子和源程序

#include <ansi_c.h>
#include <cvirte.h>		/* Needed if linking in external compiler; harmless otherwise */
#include <userint.h>
#include "sample4_1.h" 

static int panelHandle;
void CVICALLBACK MenuDimmerCallback (int menuBarHandle, int panel);      

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_1.uir", PANEL)) < 0)
		return -1;
	InstallMenuDimmerCallback ( GetPanelMenuBar(panelHandle), MenuDimmerCallback);  
	DisplayPanel (panelHandle); 
	RunUserInterface ();
	return 0;
}
    /* Dim the menu items appropriately when the menubar is clicked on */
void CVICALLBACK MenuDimmerCallback (int menuBarHandle, int panel)
{
    int textAvailable, bitmapAvailable, activeCtrl;
    int num;
 
    
    ClipboardGetText(0, &textAvailable);        /* check if text is available on the clipboard */
    ClipboardGetBitmap(0, &bitmapAvailable);    /* check if a bitmap is available on the clipboard */
	activeCtrl = GetActiveCtrl(panel);          

    SetMenuBarAttribute (menuBarHandle, MAIN_MENU_EDIT_PASTE , ATTR_DIMMED, !textAvailable && !bitmapAvailable);
    SetMenuBarAttribute (menuBarHandle, MAIN_MENU_EDIT_COPYCONTROL  , ATTR_DIMMED, activeCtrl <= 0);
	GetNumTextBoxLines (panelHandle, PANEL_TEXTBOX_1, &num);
	SetMenuBarAttribute (menuBarHandle, MAIN_MENU_EDIT_COPY, ATTR_DIMMED, num<=0);
	SetMenuBarAttribute (menuBarHandle, MAIN_MENU_EDIT_CUT, ATTR_DIMMED, num<=0);  
}
//panel callback fun
int CVICALLBACK panel (int panel, int event, void *callbackData,
		int eventData1, int eventData2)
{
	int MenuHandle;
	switch (event)
	{
		case EVENT_RIGHT_CLICK:
			MenuHandle = GetPanelMenuBar (panelHandle);
			
			RunPopupMenu (MenuHandle, MAIN_MENU_EDIT, panelHandle, eventData1,eventData2, 0, 0, 0, 0);
			
			//MessagePopup("Help","sample4_1 sample program");
			break;
	}
	return 0;
}
// Exit button callback fun
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;
}
//Canvas control callback fun   , not used ,return 1;
int CVICALLBACK Canvas (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	return 1;
}
//ClearA button callback fun   
int CVICALLBACK ClearB (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_COMMIT:
			ResetTextBox (panelHandle, PANEL_TEXTBOX_2, "");

			break;
		case EVENT_RIGHT_DOUBLE_CLICK:
			MessagePopup("Help","The destinate edit box to paste the text form clipboard");       
			break;
	}
	return 0;
}
//ClearB button callback fun   
int CVICALLBACK ClearA (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_COMMIT:
			ResetTextBox (panelHandle, PANEL_TEXTBOX_1, "");  
			break;
		case EVENT_RIGHT_DOUBLE_CLICK:
			MessagePopup("Help","The destinate edit box to copy the text to clipboard");
			break;
	}
	return 0;
}
//ClearCanvas button callback fun 
int CVICALLBACK ClearCanvas (int panel, int control, int event,
		void *callbackData, int eventData1, int eventData2)
{
	switch (event)
	{
		case EVENT_COMMIT:
			CanvasClear (panelHandle, PANEL_CANVAS, VAL_ENTIRE_OBJECT);
			break;
	}
	return 0;
}
//Menu Exit callback fun  
void CVICALLBACK MExit (int menuBar, int menuItem, void *callbackData,
		int panel)
{
	QuitUserInterface (0);
}
//Menu copy callback fun 
void CVICALLBACK Copy(int menuBar, int menuItem, void *callbackData,
		int panel)
{
     int     length;
    char    *text;  
    GetCtrlAttribute(panel, PANEL_TEXTBOX_1 , ATTR_STRING_TEXT_LENGTH, &length);
    length = length + 1;    
    /* add space for the nul terminating byte at the end of the string */
    /* allocate a buffer to copy the text in the text box control into */
    text = (char *)malloc(length);      
    if (text != NULL)
        {
        GetCtrlVal(panel, PANEL_TEXTBOX_1 , text);    /* put the text in the buffer */
        ClipboardPutText(text);             /* put the text in the buffer on the clipboard */
        free(text);                         /* free the buffer */
        }			  
}
//Menu copy control callback fun 
void CVICALLBACK CopyCONTROL (int menuBar, int menuItem, void *callbackData,
		int panel)
{
    int ctrl;
    int bitmap;
    int includeLabel;
    
    ctrl = GetActiveCtrl(panel);
    if (ctrl > 0)
        {
        includeLabel = ConfirmPopup("拷贝面板或控件图形","是否拷贝控件标号？");
        GetCtrlDisplayBitmap(panel, ctrl, includeLabel, &bitmap); 
        ClipboardPutBitmap(bitmap);                   
        DiscardBitmap(bitmap);      
        }					   
}
//Menu cut callback fun 
void CVICALLBACK Cut (int menuBar, int menuItem, void *callbackData,
		int panel)
{
     int     length;
    char    *text;  
    GetCtrlAttribute(panel, PANEL_TEXTBOX_1 , ATTR_STRING_TEXT_LENGTH, &length);
    length = length + 1;    /* add space for the nul terminating byte at the end of the string */
    /* allocate a buffer to copy the text in the text box control into */
    text = (char *)malloc(length);      
    if (text != NULL)
        {
        GetCtrlVal(panel, PANEL_TEXTBOX_1 , text);    /* put the text in the buffer */
        ClipboardPutText(text);             /* put the text in the buffer on the clipboard */
        free(text);                         /* free the buffer */
        }