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163
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1 //
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2 // TreeButton.m -- a class to attach to tree data structures
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3 // This class requires the String class, also by Don Yacktman.
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4 // Written by Don Yacktman (c) 1993 by Don Yacktman.
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5 // All rights reserved.
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6 //
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7 // I doubt this will be useful for much beyond what it does in the demo
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8 // program supplied in this directory.
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9 //
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10 // You may use and copy this class freely as long as you
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11 // comply with the following terms:
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12 // (1) If you use this class in an application which you
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13 // intend to sell commercially, as shareware, or otherwise,
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14 // you may only do so with express written permission
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15 // of the author. Use in applications which will
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16 // be distributed free of charge is encouraged.
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17 // (2) You must include the source code to this object and
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18 // all accompanying documentation with your application,
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19 // or provide it to users if requested, free of charge.
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20 // (3) Do not remove the author's name or any of the
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21 // copyright notices
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22 //
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23
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24 #import "TreeButton.h"
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25 #import "TreeButtonCell.h"
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26 #import "NamedTree.h"
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27
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28 @implementation TreeButton
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29
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30 static id treeButtonCell;
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31
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32 + initialize
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33 {
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34 if (self == [TreeButton class]) {
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35 treeButtonCell = [TreeButtonCell class]; // default cell class
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36 }
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37 return self;
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38 }
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39
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40 + setCellClass:classId
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41 {
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42 treeButtonCell = classId;
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43 return self;
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44 }
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45
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46 - initFrame:(const NXRect *)frameRect
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47 {
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48 id oldCell;
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49
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50 [super initFrame:frameRect];
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51 oldCell = [self setCell:[[[treeButtonCell alloc] init] setParent:self]];
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52 [oldCell free];
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53
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54 return self;
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55 }
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56
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57 - wasSelected:sender
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58 { // message is sent here by the Cell if the user clicked the button
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59 if ([myTreeNode respondsTo:@selector(activateNode:)])
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60 [myTreeNode activateNode:self];
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61 return self;
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62 }
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63
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64 - treeNode { return myTreeNode; }
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65 - setTreeNode:node { myTreeNode = node; return self; }
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66
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67 @end
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