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//
// MBoxLayout.m
// MySQLGUICommon
//
// Created by Alfredo Kojima on Fri Jul 23 2004.
// Copyright (c) 2004 MySQL AB. All rights reserved.
//
#import "MBoxLayout.h"
@implementation MBoxLayout
- (id)initWithFrame:(NSRect)frame
{
self= [super initWithFrame:frame];
if (self)
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(handleFrameChange:)
name:NSViewFrameDidChangeNotification
object:self];
[self setPostsFrameChangedNotifications:YES];
}
return self;
}
- (id)init
{
return [self initWithFrame:NSZeroRect];
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super dealloc];
}
- (void)handleFrameChange:(NSNotification*)notif
{
[self updateLayout];
}
- (void)setVertical:(BOOL)vertical
{
_vertical= vertical;
}
- (void)setLeftBorder:(float)leftWidth
topBorder:(float)topWidth
rightBorder:(float)rightWidth
bottomBorder:(float)bottomWidth
{
_topBorder= topWidth;
_bottomBorder= bottomWidth;
_leftBorder= leftWidth;
_rightBorder= rightWidth;
}
- (void)setAllBorders:(float)width
{
_topBorder= width;
_bottomBorder= width;
_leftBorder= width;
_rightBorder= width;
}
- (void)setSpacing:(float)spacing
{
_spacing= spacing;
}
- (void)pack:(NSView*)subview
expand:(BOOL)expand
{
[self pack:subview expand:expand minSize:1.0];
}
- (void)pack:(NSView*)subview
expand:(BOOL)expand
minSize:(float)minSize
{
[self addSubview:subview];
_subviewCount++;
_flags= NSZoneRealloc(NSDefaultMallocZone(), _flags, sizeof(MBoxLayoutAttributes)*_subviewCount);
_flags[_subviewCount-1].expand= expand;
_flags[_subviewCount-1].minSize= minSize;
_flags[_subviewCount-1].normalSize= [subview frame].size;
[self updateLayout];
}
- (void)sizeToFit
{
int i;
float s;
float totalSize;
float maxOSize;
NSRect myRect= [self frame];
#define SIZE(s) (_vertical ? (s).height : (s).width)
totalSize= 0.0;
s= 0.0;
maxOSize= 0.0;
for (i= 0; i < _subviewCount; i++)
{
MBoxLayoutAttributes *attr= _flags+i;
if (_vertical)
{
totalSize+= attr->normalSize.height + s;
maxOSize= MAX(attr->normalSize.width, maxOSize);
}
else
{
totalSize+= attr->normalSize.width + s;
maxOSize= MAX(attr->normalSize.height, maxOSize);
}
s= _spacing;
}
if (_vertical)
{
myRect.size.height= totalSize + _topBorder+_bottomBorder;
myRect.size.width= maxOSize + _leftBorder+_rightBorder;
}
else
{
myRect.size.width= totalSize + _leftBorder+_rightBorder;
myRect.size.height= maxOSize + _topBorder + _bottomBorder;
}
[self setFrame:myRect];
}
- (void)resizeSubviewsWithOldSize:(NSSize)osize
{
NSLog(@"resize subviews");
}
- (void)updateLayout
{
int i;
NSArray *children= [self subviews];
int expandableViews;
float totalSize, minSize, slackSize;
NSRect myRect= [self frame];
float mySize= _vertical ? myRect.size.height : myRect.size.width;
float myAvailSize;
float p, s;
NSLog(@"update layout %@", NSStringFromSize(myRect.size));
myAvailSize= mySize - (_subviewCount-1) * _spacing;
if (_vertical)
myAvailSize-= _topBorder+_bottomBorder;
else
myAvailSize-= _leftBorder+_rightBorder;
expandableViews= 0;
totalSize= 0.0;
minSize= 0.0;
for (i= 0; i < _subviewCount; i++)
{
id child= [children objectAtIndex:i];
MBoxLayoutAttributes *attr= _flags+i;
NSRect rect;
rect= [child frame];
totalSize+= SIZE(attr->normalSize);
minSize+= attr->minSize;
if (attr->expand)
expandableViews++;
}
if (totalSize <= myAvailSize)
slackSize= (myAvailSize - totalSize);
else
slackSize= (myAvailSize - minSize);
if (_vertical)
p= myRect.size.height - _topBorder;
else
p= _leftBorder;
for (i= 0; i < _subviewCount; i++)
{
id child= [children objectAtIndex:i];
MBoxLayoutAttributes *attr= _flags+i;
NSRect rect= [child frame];
if (slackSize < 0)
s= attr->minSize;
else
{
if (attr->expand)
{
if (totalSize <= myAvailSize)
s= SIZE(attr->normalSize) + (slackSize / expandableViews);
else
s= attr->minSize + (slackSize / expandableViews);
}
else
s= SIZE(attr->normalSize);
}
if (_vertical)
{
rect.origin.x= _leftBorder;
rect.origin.y= p - s;
rect.size.width= myRect.size.width - (_leftBorder + _rightBorder);
rect.size.height= s;
}
else
{
rect.origin.x= p;
rect.origin.y= _bottomBorder;
rect.size.width= s;
rect.size.height= myRect.size.height - (_topBorder + _bottomBorder);
}
[child setFrame:rect];
[child setNeedsDisplay:YES];
if (_vertical)
p-= s + _spacing;
else
p+= s + _spacing;
}
[self setNeedsDisplay:YES];
}
@end
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