NJKeyInputField.m

   1 //
   2 //  NJKeyInputField.h
   3 //  Enjoyable
   4 //
   5 //  Copyright 2013 Joe Wreschnig.
   6 //
   7
   8 #import "NJKeyInputField.h"
   9
  10 CGKeyCode NJKeyInputFieldEmpty = 0xFFFF;
  11
  12 @implementation NJKeyInputField
  13
  14 - (id)initWithFrame:(NSRect)frameRect {
  15     if ((self = [super initWithFrame:frameRect])) {
  16         self.alignment = NSCenterTextAlignment;
  17         [self setEditable:NO];
  18         [self setSelectable:NO];
  19     }
  20     return self;
  21 }
  22
  23 - (void)clear {
  24     self.keyCode = NJKeyInputFieldEmpty;
  25     [self.keyDelegate keyInputFieldDidClear:self];
  26     [self resignIfFirstResponder];
  27 }
  28
  29 - (BOOL)hasKeyCode {
  30     return self.keyCode != NJKeyInputFieldEmpty;
  31 }
  32
  33 + (NSString *)stringForKeyCode:(CGKeyCode)keyCode {
  34     switch (keyCode) {
  35         case 0xffff: return @"";
  36         case 0x7a: return @"F1";
  37         case 0x78: return @"F2";
  38         case 0x63: return @"F3";
  39         case 0x76: return @"F4";
  40         case 0x60: return @"F5";
  41         case 0x61: return @"F6";
  42         case 0x62: return @"F7";
  43         case 0x64: return @"F8";
  44         case 0x65: return @"F9";
  45         case 0x6d: return @"F10";
  46         case 0x67: return @"F11";
  47         case 0x6f: return @"F12";
  48         case 0x69: return @"F13";
  49         case 0x6b: return @"F14";
  50         case 0x71: return @"F15";
  51         case 0x6a: return @"F16";
  52         case 0x40: return @"F17";
  53         case 0x4f: return @"F18";
  54         case 0x50: return @"F19";
  55
  56         case 0x35: return @"Esc";
  57         case 0x32: return @"`";
  58
  59         case 0x12: return @"1";
  60         case 0x13: return @"2";
  61         case 0x14: return @"3";
  62         case 0x15: return @"4";
  63         case 0x17: return @"5";
  64         case 0x16: return @"6";
  65         case 0x1a: return @"7";
  66         case 0x1c: return @"8";
  67         case 0x19: return @"9";
  68         case 0x1d: return @"0";
  69         case 0x1b: return @"-";
  70         case 0x18: return @"=";
  71
  72         case 0x3f: return @"Fn";
  73         case 0x36: return @"Right Command";
  74         case 0x37: return @"Left Command";
  75         case 0x38: return @"Left Shift";
  76         case 0x39: return @"Caps Lock";
  77         case 0x3a: return @"Left Option";
  78         case 0x3b: return @"Left Control";
  79         case 0x3c: return @"Right Shift";
  80         case 0x3d: return @"Right Option";
  81         case 0x3e: return @"Right Control";
  82
  83         case 0x73: return @"Home";
  84         case 0x74: return @"Page Up";
  85         case 0x75: return @"Delete";
  86         case 0x77: return @"End";
  87         case 0x79: return @"Page Down";
  88
  89         case 0x30: return @"Tab";
  90         case 0x33: return @"Backspace";
  91         case 0x24: return @"Return";
  92         case 0x31: return @"Space";
  93
  94         case 0x0c: return @"Q";
  95         case 0x0d: return @"W";
  96         case 0x0e: return @"E";
  97         case 0x0f: return @"R";
  98         case 0x11: return @"T";
  99         case 0x10: return @"Y";
 100         case 0x20: return @"U";
 101         case 0x22: return @"I";
 102         case 0x1f: return @"O";
 103         case 0x23: return @"P";
 104         case 0x21: return @"[";
 105         case 0x1e: return @"]";
 106         case 0x2a: return @"\\";
 107         case 0x00: return @"A";
 108         case 0x01: return @"S";
 109         case 0x02: return @"D";
 110         case 0x03: return @"F";
 111         case 0x05: return @"G";
 112         case 0x04: return @"H";
 113         case 0x26: return @"J";
 114         case 0x28: return @"K";
 115         case 0x25: return @"L";
 116         case 0x29: return @";";
 117         case 0x27: return @"'";
 118         case 0x06: return @"Z";
 119         case 0x07: return @"X";
 120         case 0x08: return @"C";
 121         case 0x09: return @"V";
 122         case 0x0b: return @"B";
 123         case 0x2d: return @"N";
 124         case 0x2e: return @"M";
 125         case 0x2b: return @",";
 126         case 0x2f: return @".";
 127         case 0x2c: return @"/";
 128
 129         case 0x47: return @"Clear";
 130         case 0x51: return @"Keypad =";
 131         case 0x4b: return @"Keypad /";
 132         case 0x43: return @"Keypad *";
 133         case 0x59: return @"Keypad 7";
 134         case 0x5b: return @"Keypad 8";
 135         case 0x5c: return @"Keypad 9";
 136         case 0x4e: return @"Keypad -";
 137         case 0x56: return @"Keypad 4";
 138         case 0x57: return @"Keypad 5";
 139         case 0x58: return @"Keypad 6";
 140         case 0x45: return @"Keypad +";
 141         case 0x53: return @"Keypad 1";
 142         case 0x54: return @"Keypad 2";
 143         case 0x55: return @"Keypad 3";
 144         case 0x52: return @"Keypad 0";
 145         case 0x41: return @"Keypad .";
 146         case 0x4c: return @"Enter";
 147
 148         case 0x7e: return @"Up";
 149         case 0x7d: return @"Down";
 150         case 0x7b: return @"Left";
 151         case 0x7c: return @"Right";
 152         default:
 153             return [[NSString alloc] initWithFormat:@"Key 0x%x", keyCode];
 154     }
 155 }
 156
 157 - (BOOL)acceptsFirstResponder {
 158     return self.isEnabled;
 159 }
 160
 161 - (BOOL)becomeFirstResponder {
 162     self.backgroundColor = NSColor.selectedTextBackgroundColor;
 163     return [super becomeFirstResponder];
 164 }
 165
 166 - (BOOL)resignFirstResponder {
 167     self.backgroundColor = NSColor.textBackgroundColor;
 168     return [super resignFirstResponder];
 169 }
 170
 171 - (void)setKeyCode:(CGKeyCode)keyCode {
 172     _keyCode = keyCode;
 173     self.stringValue = [NJKeyInputField stringForKeyCode:keyCode];
 174 }
 175
 176 - (void)keyDown:(NSEvent *)theEvent {
 177     if (!theEvent.isARepeat) {
 178         if ((theEvent.modifierFlags & NSAlternateKeyMask)
 179             && theEvent.keyCode == 0x33) {
 180             // Allow Alt+Backspace to clear the field.
 181             self.keyCode = NJKeyInputFieldEmpty;
 182             [self.keyDelegate keyInputFieldDidClear:self];
 183         } else if ((theEvent.modifierFlags & NSAlternateKeyMask)
 184                 && theEvent.keyCode == 0x35) {
 185                 // Allow Alt+Escape to cancel.
 186             ;
 187         } else {
 188             self.keyCode = theEvent.keyCode;
 189             [self.keyDelegate keyInputField:self didChangeKey:_keyCode];
 190         }
 191         [self resignIfFirstResponder];
 192     }
 193 }
 194
 195 - (void)mouseDown:(NSEvent *)theEvent {
 196     if (self.acceptsFirstResponder)
 197         [self.window makeFirstResponder:self];
 198 }
 199
 200 - (void)flagsChanged:(NSEvent *)theEvent {
 201     // Many keys are only available on MacBook keyboards by using the
 202     // Fn modifier key (e.g. Fn+Left for Home), so delay processing
 203     // modifiers until the up event is received in order to let the
 204     // user type these virtual keys. However, there is no actual event
 205     // for modifier key up - so detect it by checking to see if any
 206     // modifiers are still down.
 207     if (!(theEvent.modifierFlags & NSDeviceIndependentModifierFlagsMask)) {
 208         self.keyCode = theEvent.keyCode;
 209         [self.keyDelegate keyInputField:self didChangeKey:_keyCode];
 210     }
 211 }
 212
 213 @end