120 lines
3.3 KiB
Objective-C
120 lines
3.3 KiB
Objective-C
/*
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* PDP-8/E Simulator
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*
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* Copyright © 1994-2015 Bernhard Baehr
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*
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* KnobCell.m - NSButtonCell subclass for the console turning switches
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*
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* This file is part of PDP-8/E Simulator.
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*
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* PDP-8/E Simulator is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#import <Cocoa/Cocoa.h>
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#import "KnobCell.h"
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@implementation KnobCell
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- (void) awakeFromNib
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{
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int i;
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NSString *imageNamePrefix = [self alternateTitle];
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[(NSButton *)[self controlView] setAlternateTitle:nil];
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int numberOfImages = [self tag];
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if (numberOfImages < 0)
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numberOfImages = -numberOfImages;
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images = [[NSMutableArray alloc] initWithCapacity:numberOfImages];
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for (i = 0; i < numberOfImages; i++) {
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[images insertObject:[[[NSImage alloc] initByReferencingFile:
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[[NSBundle bundleForClass:[self class]]
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pathForResource:[imageNamePrefix stringByAppendingFormat:@"%d", i]
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ofType:@"png"]] autorelease]
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atIndex:i];
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}
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}
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- (void) setTag:(int)tag
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// correctly, we would have to overwrite [NSButton setTag], but to avoid subclassing NSButton,
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// we use the cell method to set the buttons tag and image
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{
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NSButton *button = (NSButton *)[self controlView];
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[button setTag:tag];
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[button setImage:[images objectAtIndex:tag]];
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[button setAlternateImage:[images objectAtIndex:tag]];
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}
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- (void) performClick:(id)sender
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{
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// called by the key equivalents
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int newsegment = ([sender tag] + 1) % [images count];
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[sender setImage:[images objectAtIndex:newsegment]];
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[sender setAlternateImage:[images objectAtIndex:newsegment]];
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[sender setTag:newsegment];
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[[self target] performSelector:[self action] withObject:sender];
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[[self controlView] setNeedsDisplay:YES]; // to show keyboad operation via space key with Tiger
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}
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- (BOOL) startTrackingAt:(NSPoint)startPoint inView:(NSView *)controlView
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{
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return YES;
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}
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- (void) trackAt:(NSPoint)currentPoint inView:(NSButton *)control sendAction:(BOOL)sendAction
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{
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int segments = [self tag];
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NSSize size = [control bounds].size;
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float length = size.height;
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float pos = currentPoint.y;
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if (segments < 0) {
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segments = -segments;
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length = size.width;
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pos = currentPoint.x;
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}
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int newsegment = pos / length * segments;
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if (newsegment != [control tag]) {
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[control setImage:[images objectAtIndex:newsegment]];
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[control setAlternateImage:[images objectAtIndex:newsegment]];
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[control setTag:newsegment];
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if (sendAction)
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[[self target] performSelector:[self action] withObject:control];
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}
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}
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- (BOOL) continueTracking:(NSPoint)lastPoint at:(NSPoint)currentPoint inView:(NSButton *)control
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{
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[self trackAt:currentPoint inView:control sendAction:YES];
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return YES;
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}
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- (void) stopTracking:(NSPoint)lastPoint at:(NSPoint)stopPoint inView:(NSButton *)control mouseIsUp:(BOOL)up
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{
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if (up)
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[self trackAt:stopPoint inView:control sendAction:NO];
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}
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@end
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