cappuccino/AppKit/CPTableHeaderView.j

/*
 * CPTableHeaderView.j
 * AppKit
 *
 * Created by Ross Boucher.
 * Copyright 2009 280 North, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

@import "CPTableColumn.j"
@import "CPTableView.j"
@import "CPView.j"
 
@implementation _CPTableColumnHeaderView : CPView
{
    _CPImageAndTextView _textField;
}

- (void)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {   
        [self _init];
    }
    
    return self;
}

- (void)_init
{
    _textField = [[_CPImageAndTextView alloc] initWithFrame:CGRectMake(5, 1, CGRectGetWidth([self bounds]) - 10, CGRectGetHeight([self bounds]) - 1)];
    [_textField setAutoresizingMask:CPViewWidthSizable|CPViewHeightSizable];
    
    [_textField setLineBreakMode:CPLineBreakByTruncatingTail];
    [_textField setTextColor: [CPColor colorWithHexString: @"333333"]];
    [_textField setFont:[CPFont boldSystemFontOfSize:12.0]];
    [_textField setAlignment:CPLeftTextAlignment];
    [_textField setVerticalAlignment:CPCenterVerticalTextAlignment];
    [_textField setTextShadowColor:[CPColor whiteColor]];
    [_textField setTextShadowOffset:CGSizeMake(0,1)];

    [self addSubview:_textField];
}

- (void)layoutSubviews
{
    var themeState = [self themeState];

    if(themeState & CPThemeStateSelected && themeState & CPThemeStateHighlighted)
        [self setBackgroundColor:[CPColor colorWithPatternImage:CPAppKitImage("tableview-headerview-highlighted-pressed.png", CGSizeMake(1.0, 22.0))]];
    else if (themeState & CPThemeStateSelected)
        [self setBackgroundColor:[CPColor colorWithPatternImage:CPAppKitImage("tableview-headerview-highlighted.png", CGSizeMake(1.0, 22.0))]];
    else if (themeState & CPThemeStateHighlighted)
        [self setBackgroundColor:[CPColor colorWithPatternImage:CPAppKitImage("tableview-headerview-pressed.png", CGSizeMake(1.0, 22.0))]];
    else 
        [self setBackgroundColor:[CPColor colorWithPatternImage:CPAppKitImage("tableview-headerview.png", CGSizeMake(1.0, 22.0))]];
}

- (void)setStringValue:(CPString)string
{
    [_textField setText:string];
}

- (CPString)stringValue
{
    return [_textField text];
}

- (void)textField
{
    return _textField;
}

- (void)sizeToFit
{
    [_textField sizeToFit];
}

- (void)setFont:(CPFont)aFont
{
    [_textField setFont:aFont];
}

- (void)setValue:(id)aValue forThemeAttribute:(id)aKey
{
    [_textField setValue:aValue forThemeAttribute:aKey];
}

- (void)_setIndicatorImage:(CPImage)anImage
{
	if (anImage)
	{
		[_textField setImage:anImage];
		[_textField setImagePosition:CPImageRight];
	}
	else
	{
		[_textField setImagePosition:CPNoImage];
	}
}

@end

var _CPTableColumnHeaderViewStringValueKey = @"_CPTableColumnHeaderViewStringValueKey",
    _CPTableColumnHeaderViewFontKey = @"_CPTableColumnHeaderViewFontKey",
    _CPTableColumnHeaderViewImageKey = @"_CPTableColumnHeaderViewImageKey";

@implementation _CPTableColumnHeaderView (CPCoding)

- (id)initWithCoder:(CPCoder)aCoder
{
    if (self = [super initWithCoder:aCoder])
    {
        [self _init];
        [self _setIndicatorImage:[aCoder decodeObjectForKey:_CPTableColumnHeaderViewImageKey]];
        [self setStringValue:[aCoder decodeObjectForKey:_CPTableColumnHeaderViewStringValueKey]];
        [self setFont:[aCoder decodeObjectForKey:_CPTableColumnHeaderViewFontKey]];
    }

    return self;
}

- (void)encodeWithCoder:(CPCoder)aCoder
{
    [super encodeWithCoder:aCoder];
    
    [aCoder encodeObject:[_textField text] forKey:_CPTableColumnHeaderViewStringValueKey];
    [aCoder encodeObject:[_textField image] forKey:_CPTableColumnHeaderViewImageKey];
    [aCoder encodeObject:[_textField font] forKey:_CPTableColumnHeaderViewFontKey];
}

@end

@implementation CPTableHeaderView : CPView
{
    int _resizedColumn @accessors(readonly, property=resizedColumn);
    int _draggedColumn @accessors(readonly, property=draggedColumn);
    int _pressedColumn @accessors(readonly, property=pressedColumn);
    
    float _draggedDistance @accessors(readonly, property=draggedDistance);
    float _lastLocation;
    float _columnOldWidth;
    
    CPTableView _tableView @accessors(property=tableView);
}

- (void)initWithFrame:(CGRect)aFrame
{
    self = [super initWithFrame:aFrame];

    if (self)
    {
        _resizedColumn = -1;
        _draggedColumn = -1;
        _pressedColumn = -1;
        _draggedDistance = 0.0;
        _lastLocation = nil;
        _columnOldWidth = nil;
        
        [self setBackgroundColor:[CPColor colorWithPatternImage:CPAppKitImage("tableview-headerview.png", CGSizeMake(1.0, 22.0))]];
    }

    return self;
}

- (int)columnAtPoint:(CGPoint)aPoint
{
    return [_tableView columnAtPoint:CGPointMake(aPoint.x, 0)];
}

- (CGRect)headerRectOfColumn:(int)aColumnIndex
{
    var tableColumns = [_tableView tableColumns];

    if (aColumnIndex < 0 || aColumnIndex > [tableColumns count])
        [CPException raise:"invalid" reason:"tried to get headerRectOfColumn: on invalid column"];

    // UPDATE COLUMN RANGES ?
        
    var tableRange = _tableView._tableColumnRanges[aColumnIndex],
        bounds = [self bounds];

    var rMinX = ROUND(tableRange.location);
    bounds.origin.x = rMinX;
    bounds.size.width = FLOOR(tableRange.length + tableRange.location - rMinX);
    
    return bounds;
}

- (CGRect)_cursorRectForColumn:(int)column
{
    if (column == -1 || !([_tableView._tableColumns[column] resizingMask] & CPTableColumnUserResizingMask))
        return CGRectMakeZero();

    var rect = [self headerRectOfColumn:column];

    rect.origin.x = CGRectGetMaxX(rect) - 5;
    rect.size.width = 20;

    return rect;    
}

- (void)_setPressedColumn:(CPInteger)column
{
    if (_pressedColumn != -1)
    {
        var headerView = [_tableView._tableColumns[_pressedColumn] headerView];
        [headerView unsetThemeState:CPThemeStateHighlighted];
    }    
    
    if (column != -1)
    {
        var headerView = [_tableView._tableColumns[column] headerView];
        [headerView setThemeState:CPThemeStateHighlighted];
    }
    
    _pressedColumn = column;
}

- (void)mouseDown:(CPEvent)theEvent
{
    var mouseLocation = [self convertPoint:[theEvent locationInWindow] fromView:nil],
        clickedColumn = [self columnAtPoint:mouseLocation];    
    
    // should we send column -1 ?
    [_tableView _sendDelegateDidMouseDownInHeader:clickedColumn];
    
    var resizeLocation = CGPointMake(mouseLocation.x - 5, mouseLocation.y),
        resizedColumn = [self columnAtPoint:resizeLocation];
    
    if (resizedColumn == -1)
        return;

    // 2 different tracking methods: one for resizing/stop-resizing, another one for selection/reordering
    if ([_tableView allowsColumnResizing]
        && CGRectContainsPoint([self _cursorRectForColumn:resizedColumn], mouseLocation))
    {
        _resizedColumn = resizedColumn;
        [_tableView._tableColumns[_resizedColumn] setDisableResizingPosting:YES];
        [_tableView setDisableAutomaticResizing:YES];
        [self trackResizeWithEvent:theEvent];
    }
    else
    {
        [self _setPressedColumn:clickedColumn];
        [self trackMouseWithEvent:theEvent];
    }    
}

- (void)trackMouseWithEvent:(CPEvent)theEvent
{
    var type = [theEvent type];
    
    if (type == CPLeftMouseUp)
    {
        var location = [self convertPoint:[theEvent locationInWindow] fromView:nil],
            clickedColumn = [self columnAtPoint:location];

        [self _setPressedColumn:-1];
        
        if (clickedColumn != -1)
            [_tableView _didClickTableColumn:clickedColumn modifierFlags:[theEvent modifierFlags]];
        
        return;
    }

    [CPApp setTarget:self selector:@selector(trackMouseWithEvent:) forNextEventMatchingMask:CPLeftMouseDraggedMask | CPLeftMouseUpMask | CPLeftMouseDownMask untilDate:nil inMode:nil dequeue:YES];
}

- (void)trackResizeWithEvent:(CPEvent)anEvent
{
    var location = [self convertPoint:[anEvent locationInWindow] fromView:nil],
        tableColumn = [[_tableView tableColumns] objectAtIndex:_resizedColumn],
        type = [anEvent type];

    if (_lastLocation == nil)
        _lastLocation = location;

    if (_columnOldWidth == nil)
        _columnOldWidth = [tableColumn width];

    if (type === CPLeftMouseUp)
    {   
        [self _updateResizeCursor:anEvent];
                
        [tableColumn _postDidResizeNotificationWithOldWidth:_columnOldWidth];
        [tableColumn setDisableResizingPosting:NO];        
        [_tableView setDisableAutomaticResizing:NO];

        _resizedColumn = -1;
        _lastLocation = nil;
        _columnOldWidth = nil;

        return;
    }            
    else if (type === CPLeftMouseDragged)
    {
        var newWidth = [tableColumn width] + location.x - _lastLocation.x;
        
        if (newWidth < [tableColumn minWidth])
            [[CPCursor resizeRightCursor] set];
        else if (newWidth > [tableColumn maxWidth])
            [[CPCursor resizeLeftCursor] set];
        else
        {
            _tableView._lastColumnShouldSnap = NO;
            [tableColumn setWidth:newWidth];
            // FIXME: there has to be a better way to do this...
            // We should refactor the auto resizing crap.
            // We need to figure out the exact cocoa behavior here though. 
            _lastLocation = location;

            [[CPCursor resizeLeftRightCursor] set];
            [self setNeedsLayout];
            [self setNeedsDisplay:YES];
        }
    }

    [CPApp setTarget:self selector:@selector(trackResizeWithEvent:) forNextEventMatchingMask:CPLeftMouseDraggedMask | CPLeftMouseUpMask untilDate:nil inMode:nil dequeue:YES];
}

- (void)_updateResizeCursor:(CPEvent)theEvent
{
    // never get stuck in resize cursor mode (FIXME take out when we turn on tracking rects)
    if (![_tableView allowsColumnResizing] || ([theEvent type] === CPLeftMouseUp && ![[self window] acceptsMouseMovedEvents]))
    {
        [[CPCursor arrowCursor] set];
        return;
    }

    var mouseLocation = [self convertPoint:[theEvent locationInWindow] fromView:nil],    
        mouseOverLocation = CGPointMake(mouseLocation.x - 5, mouseLocation.y),
        overColumn = [self columnAtPoint:mouseOverLocation];
    
    if (overColumn >= 0 && CGRectContainsPoint([self _cursorRectForColumn:overColumn], mouseLocation))
    {
        var tableColumn = [[_tableView tableColumns] objectAtIndex:overColumn],
            width = [tableColumn width];
            
        if (width == [tableColumn minWidth])
            [[CPCursor resizeRightCursor] set];
        else if (width == [tableColumn maxWidth])
            [[CPCursor resizeLeftCursor] set];
        else
            [[CPCursor resizeLeftRightCursor] set];
    }
    else
        [[CPCursor arrowCursor] set];
}

- (void)viewDidMoveToWindow
{
    //if ([_tableView allowsColumnResizing])
    //    [[self window] setAcceptsMouseMovedEvents:YES];
}

- (void)mouseEntered:(CPEvent)theEvent
{   
    [self _updateResizeCursor:theEvent];
}

- (void)mouseMoved:(CPEvent)theEvent
{
    [self _updateResizeCursor:theEvent];
}

- (void)mouseExited:(CPEvent)theEvent
{
    // FIXME: we should use CPCursor push/pop (if previous currentCursor != arrow).
    [[CPCursor arrowCursor] set];
}

- (void)layoutSubviews
{
    var tableColumns = [_tableView tableColumns],
        count = [tableColumns count];    
    
    for (var i = 0; i < count; i++) 
    {
        var column = [tableColumns objectAtIndex:i],
            headerView = [column headerView];
        
        var frame = [self headerRectOfColumn:i];
        frame.size.height -= 0.5;
        if (i > 0) 
        {
            frame.origin.x += 0.5;
            frame.size.width -= 1;
        }
        
        [headerView setFrame:frame];
        
        if([headerView superview] != self)
            [self addSubview:headerView];
    }
}

- (void)drawRect:(CGRect)aRect
{
    if (!_tableView)
        return;

    var context = [[CPGraphicsContext currentContext] graphicsPort],
        exposedColumnIndexes = [_tableView columnIndexesInRect:aRect],
        columnsArray = [],
        tableColumns = [_tableView tableColumns],
        exposedTableColumns = _tableView._exposedColumns,
        firstIndex = [exposedTableColumns firstIndex],
        exposedRange = CPMakeRange(firstIndex, [exposedTableColumns lastIndex] - firstIndex + 1);

    CGContextSetLineWidth(context, 1);
    CGContextSetStrokeColor(context, [_tableView gridColor]);

    [exposedColumnIndexes getIndexes:columnsArray maxCount:-1 inIndexRange:exposedRange];

    var columnArrayIndex = 0,
        columnArrayCount = columnsArray.length,
        columnMaxX;
        
    CGContextBeginPath(context);
    for(; columnArrayIndex < columnArrayCount; columnArrayIndex++)
    {
        // grab each column rect and add vertical lines
        var columnIndex = columnsArray[columnArrayIndex],
            columnToStroke = [self headerRectOfColumn:columnIndex];
            
        columnMaxX = CGRectGetMaxX(columnToStroke);
        
        CGContextMoveToPoint(context, ROUND(columnMaxX) + 0.5, ROUND(CGRectGetMinY(columnToStroke)));
        CGContextAddLineToPoint(context, ROUND(columnMaxX) + 0.5, ROUND(CGRectGetMaxY(columnToStroke)));
    }
    
    CGContextClosePath(context);
    CGContextStrokePath(context);
        
/*
    var maxY = CGRectGetMaxY([self bounds]);
    // draw normal gradient for remaining space
    if (supportsCanvasGradient)
    {
        aRect.origin.x = columnMaxX - 0.5;
        aRect.size.width -= columnMaxX;
        CGContextBeginPath(context);
        CGContextAddRect(context, CGRectMake(columnMaxX + 1, 0, CGRectGetMaxX([self bounds]) - columnMaxX, CGRectGetHeight([self bounds])));
        CGContextClosePath(context);    
        CGContextDrawLinearGradient(context, [_CPTableColumnHeaderView headerGradient], CGPointMake(0,0), CGPointMake(0, maxY - 1),0);
    }   
   
    // Draw bottom line
    CGContextBeginPath(context);    
    CGContextMoveToPoint(context, 0, maxY - 0.5);
    CGContextAddLineToPoint(context, CGRectGetMaxX([self bounds]), maxY - 0.5);
    CGContextClosePath(context);
    CGContextStrokePath(context);
*/   
}

@end

var CPTableHeaderViewTableViewKey = @"CPTableHeaderViewTableViewKey";

@implementation CPTableHeaderView (CPCoding)

- (id)initWithCoder:(CPCoder)aCoder
{
    if (self = [super initWithCoder:aCoder])
    {
        _resizedColumn = -1;
        _draggedColumn = -1;
        _pressedColumn = -1;
        _draggedDistance = 0.0;
        _lastLocation = nil;
        _columnOldWidth = nil;
        _tableView = [aCoder decodeObjectForKey:CPTableHeaderViewTableViewKey];
    }

    return self;
}

- (void)encodeWithCoder:(CPCoder)aCoder
{
    [super encodeWithCoder:aCoder];
    [aCoder encodeObject:_tableView forKey:CPTableHeaderViewTableViewKey];
}

@end