ITTabView.m

   1 #import "ITTabView.h"
   2
   3 @implementation ITTabView
   4
   5 - (id)initWithFrame:(NSRect)frame
   6 {
   7     if ( (self = [super initWithFrame:frame]) ) {
   8         _draggedTab = nil;
   9         _allowsDragging = NO;
  10     }
  11     return self;
  12 }
  13
  14 - (void)setAllowsDragging:(bool)flag
  15 {
  16     _allowsDragging = flag;
  17 }
  18
  19 - (bool)allowsDragging
  20 {
  21     return _allowsDragging;
  22 }
  23
  24 - (void)moveTab:(NSTabViewItem *)tab toIndex:(int)index
  25 {
  26     if ([self indexOfTabViewItem:tab] != index)
  27     {
  28         [tab retain];
  29         [self removeTabViewItem:tab];
  30         [self insertTabViewItem:tab atIndex:index];
  31         [self selectTabViewItem:tab];
  32     }
  33 }
  34
  35 - (void)mouseDown:(NSEvent *)event
  36 {
  37     if ([self allowsDragging]) {
  38         NSPoint clickedPoint = [self convertPoint:[event locationInWindow] fromView:[[self window] contentView]];
  39         NSTabViewItem *clickedTab = [self tabViewItemAtPoint:clickedPoint];
  40         _draggedTab = clickedTab;
  41     }
  42     [super mouseDown:event];
  43 }
  44
  45 - (void)mouseUp:(NSEvent *)event
  46 {
  47     if ([self allowsDragging]) {
  48         NSPoint releasedPoint = [self convertPoint:[event locationInWindow] fromView:[[self window] contentView]];
  49         NSTabViewItem *releasedTab = [self tabViewItemAtPoint:releasedPoint];
  50         if (releasedTab && ![releasedTab isEqualTo:_draggedTab]) {
  51             [self moveTab:_draggedTab toIndex:[self indexOfTabViewItem:releasedTab]];
  52         }
  53         _draggedTab = nil;
  54     }
  55     [super mouseUp:event];
  56 }
  57
  58 - (void)mouseDragged:(NSEvent *)event
  59 {
  60     if ([self allowsDragging]) {
  61         NSPoint currentPoint = [self convertPoint:[event locationInWindow] fromView:[[self window] contentView]];
  62         NSTabViewItem *curTab = [self tabViewItemAtPoint:currentPoint];
  63         if (curTab && ![curTab isEqualTo:_draggedTab]) {
  64             [self moveTab:_draggedTab toIndex:[self indexOfTabViewItem:curTab]];
  65             [self selectTabViewItem:_draggedTab];
  66         }
  67     }
  68     [super mouseDragged:event];
  69 }
  70
  71 @end