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/***(LcdText.m)****************************************************************
*H* LcdText implementation of Text Subclass *
******************************************************************************/
#import <appkit/Pasteboard.h>
#import <appkit/Font.h>
#import "LcdText.h"
#import "Calculator.h"
void UTL_NxDumpEvent (NXEvent*, int, int, int);
@implementation LcdText
/******************************************************************************
* FUNCTION: NoCharFilter *
******************************************************************************/
unsigned short NoCharFilter
(/* Arguments */
unsigned short theChar,
int flags,
unsigned short charSet)
{
return(theChar);
}
/******************************************************************************
* INSTANCE METHOD:- initFrame: *
* This method overrides its super class to define specific initial *
* attributes of a Text object. *
******************************************************************************/
- initFrame
/* Arguments */
:(NXRect *)frameRect
{ /* Local Variables */
NXRect sizeRect;
/* BEGIN-initFrame: */
[super initFrame:frameRect];
/* Establish the font characteristics for this Text Object */
[self setMonoFont:YES];
[self setFont:[Font newFont:"Courier-Bold" size:14.0
style:0 matrix:NX_FLIPPEDMATRIX]];
[self setBackgroundGray:NX_WHITE];
[self setOpaque:YES];
/* Set Text for resizing */
[self notifyAncestorWhenFrameChanged: YES];
[self setVertResizable:YES];
/* Set size restrictions appropriate for a scrolling Text Object */
sizeRect = *frameRect;
[self setMinSize:&sizeRect.size];
sizeRect.size.height = 1.0e30;
[self setMaxSize:&sizeRect.size];
[self setCharFilter:NoCharFilter];
/* Initial the text position of the beginning of the current line */
IVstartOfCurLine = 0;
return(self);
}/* END-initFrame: */
/******************************************************************************
* INSTANCE METHOD:- keyDown: *
* This method captures any keystrokes that would have been interpreted by *
* the LcdText Object and diverts them for interpretation by the Calculator *
* object. *
******************************************************************************/
- keyDown
/* Arguments */
:(NXEvent *)event
{/* BEGIN-keyDown: */
#ifdef DEBUG
printf("LcdText-keyDown:");
UTL_NxDumpEvent (event, 1, 1, 1);
#endif
/* Give event to the Calculator Object */
[Calculator KeyBoardEquivalent:event];
return(self);
}/* END-keyDown: */
/******************************************************************************
* INSTANCE METHOD:- paste: *
* This method overides its super class to control what can be pasted to the *
* LcdText object. This method yanks the ASCII data from the Pasteboard and *
* sends it to the Calculator Object for parsing. This restricts the text that *
* can be pasted to the LcdTextObject. *
******************************************************************************/
- paste:sender
{ /* Local Variables */
id pboard;
char *pbData;
int pbLength;
const NXAtom *pbTypes;
/* BEGIN-paste: */
/* Query the Global Pasteboard Object for Id and Data Types */
pboard = [Pasteboard newName:NXGeneralPboard];
pbTypes = [pboard types];
if ( [pboard readType:NXAsciiPboardType data:&pbData length:&pbLength] )
{/* Use the data here, keeping it for as long as necessary */
[Calculator PasteExpression:pbData Length:pbLength];
[pboard deallocatePasteboardData:pbData length:pbLength];
}
return(self);
}/* END-paste: */
/******************************************************************************
* INSTANCE METHOD:- newLine: *
* This method places a new line at the end of the current line. *
******************************************************************************/
- newLine:sender
{ /* Local Variables */
int endOfText;
/* BEGIN-newLine: */
endOfText = [self textLength];
[self setSel:endOfText :endOfText];
[self replaceSel:"\n"];
IVstartOfCurLine = endOfText+1;
return(self);
}/* END-newLine: */
/******************************************************************************
* INSTANCE METHOD:- setCurrentLine: *
* This method replaces the current line with the supplied text. *
******************************************************************************/
- setCurrentLine
/* Arguments */
:(const char*)string /* String to replace current line */
{ /* Local Variables */
int endOfText;
/* BEGIN-setCurrentLine: */
/* Turn off updates until finished mangling the text */
[self setAutodisplay:NO];
/* Replace the text from the begining to the end of the current line */
endOfText = [self textLength];
[self setSel:IVstartOfCurLine :endOfText];
[self scrollSelToVisible];
[self replaceSel:string];
/* Restore updates and redisplay the Text object */
[[self setAutodisplay:YES] display];
return(self);
}/* END-setCurrentLine: */
/******************************************************************************
* INSTANCE METHOD:- appendCurrentLine: *
* This method appends the supplied text to the end of the current line. *
******************************************************************************/
- appendCurrentLine
/* Arguments */
:(const char*)string /*I* String to Append to current line */
{ /* Local Variables */
int endOfText;
/* BEGIN-appendCurrentLine: */
/* Turn off updates until finished mangling the text */
[self setAutodisplay:NO];
/* Add new text at the end of the current line */
endOfText = [self textLength];
[self setSel:endOfText :endOfText];
[self scrollSelToVisible];
[self replaceSel:string];
/* Restore updates and redisplay the Text object */
[[self setAutodisplay:YES] display];
return(self);
}/* END-appendCurrentLine: */
/******************************************************************************
* INSTANCE METHOD:- setTarget:Action: *
* This method establishes an object to receive the action method specified. *
******************************************************************************/
- setTarget
/* Arguments */
:anObject
Action:(SEL)aSelector
{/* BEGIN-setTarget:Action: */
IVactionId = anObject;
IVactionSel = aSelector;
return(self);
}/* END-setTarget:Action: */
#if 0
/******************************************************************************
* INSTANCE METHOD:- textDidChange: *
******************************************************************************/
- textDidChange:sender
{/* BEGIN-textDidChange: */
printf("LcdText:-textDidChange:\n");
return(self);
}/* END-textDidChange: */
/******************************************************************************
* INSTANCE METHOD:- textWillChange: *
******************************************************************************/
- (BOOL)textWillChange:sender
{/* BEGIN-textWillChange: */
printf("LcdText:-textWillChange:\n");
return(YES);
}/* END-textWillChange: */
#endif
@end /* implementation LcdText */
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