NTabView

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SoCoder -> Snippet Home -> Text and GUI's

Cower	Created : 09 April 2010 System : Mac Language : C# NTabView Tab view from my NToolkit framework
This is a subclass of NSTabView that has no border and just a tab strip at the top. You use it the same way you would a regular NSTabView, so there's not really any need for much explanation. The height of the tab strip is changeable, although it'll probably look odd at heights less than 40 or so. The color of highlighted tabs can be changed, just look at the properties in the header. Looks like this (in a HUD window, anyway): // // NTabView.h // NToolkit // // Created by Noel Cower on 3/29/10. // Copyright (c) 2010 Noel R. Cower // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // #import <Cocoa/Cocoa.h> @interface NTabView : NSTabView <NSCoding> { @private NSUInteger _stripHeight; NSCell _labelCell; NSColor _highlightColor; } @property (assign) NSColor highlightColor; @property (assign) NSUInteger tabstripHeight; - (id)initWithCoder:(NSCoder )aDecoder; - (void)encodeWithCoder:(NSCoder )aCoder; @end --v // // NTabView.m // NToolkit // // Created by Noel Cower on 3/29/10. // Copyright (c) 2010 Noel R. Cower // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // #import "NTabView.h" @implementation NTabView static NSColor cv_color_clicked; static NSColor cv_color_back; static NSGradient cv_grad_back; static NSGradient cv_grad_clicked; static NSGradient cv_grad_rim; static NSBezierPath cv_triangle; static NSFont cv_font; + (void)initialize { if (self == [NTabView class]) { NSBezierPath triangle = [[NSBezierPath alloc] init]; [triangle moveToPoint:NSMakePoint(0.0, -1.0)]; [triangle lineToPoint:NSMakePoint(28.0, -1.0)]; [triangle lineToPoint:NSMakePoint(14.0, 17.0)]; [triangle closePath]; cv_triangle = triangle; cv_color_back = [[NSColor colorWithDeviceWhite:0.2 alpha:1.0] retain]; cv_color_clicked = [[NSColor colorWithDeviceWhite:0.1343 alpha:1.0] retain]; NSColor invis = [NSColor colorWithDeviceWhite:0.0 alpha:0.0]; NSColor shadow = [NSColor colorWithDeviceWhite:0.0 alpha:0.2]; cv_grad_back = [[NSGradient alloc] initWithStartingColor:shadow endingColor:invis]; cv_grad_rim = [[NSGradient alloc] initWithStartingColor:[NSColor colorWithDeviceWhite:1.0 alpha:0.1] endingColor:invis]; cv_grad_clicked = [[NSGradient alloc] initWithStartingColor:shadow endingColor:invis]; NSFontManager fontManager = [NSFontManager sharedFontManager]; cv_font = [[fontManager fontWithFamily:@"Helvetica Neue" traits:NSBoldFontMask weight:0 size:15.0] retain]; } } + (NSCell )_allocLabelCell { NSCell cell = [[NSCell alloc] initTextCell:@""]; [cell setFont: [[[NSFontManager sharedFontManager] fontWithFamily:@"Helvetica Neue" traits:NSBoldFontMask weight:0 size:15.0] retain]]; [cell setBackgroundStyle:NSBackgroundStyleDark]; [cell setAlignment:NSCenterTextAlignment]; return cell; } @dynamic highlightColor; @synthesize tabstripHeight=_stripHeight; - (id)initWithCoder:(NSCoder )aDecoder { self = [super initWithCoder:aDecoder]; if (self) { _stripHeight = (NSUInteger)[aDecoder decodeIntegerForKey:@"StripHeight"]; _highlightColor = [aDecoder decodeObjectForKey:@"HighlightColor"]; if (!_highlightColor) _highlightColor = [NSColor colorWithDeviceRed:0.0 green:0.373 blue:0.831 alpha:1.0]; [_highlightColor retain]; _labelCell = [[self class] _allocLabelCell]; } return self; } - (id)initWithFrame:(NSRect)frameRect { self = [super initWithFrame:frameRect]; if (self) { [self setDrawsBackground:NO]; [self setTabViewType:NSNoTabsNoBorder]; _stripHeight = 50; _highlightColor = [[NSColor colorWithDeviceRed:0.0 green:0.373 blue:0.831 alpha:1.0] retain]; _labelCell = [[self class] _allocLabelCell]; } return self; } - (void)setTabstripHeight:(NSUInteger)height { _stripHeight = height; NSRect bounds = [self contentRect]; for (NSTabViewItem tab in [self tabViewItems]) [[tab view] setFrame:bounds]; [self _setTabstripNeedsDisplay]; } - (void)setHighlightColor:(NSColor )color { [_highlightColor release]; _highlightColor = [[color colorWithAlphaComponent:1.0] retain]; [self _setTabstripNeedsDisplay]; } - (NSColor )highlightColor { return [[_highlightColor retain] autorelease]; } - (void)encodeWithCoder:(NSCoder )aCoder { [super encodeWithCoder:aCoder]; [aCoder encodeInteger:(NSInteger)_stripHeight forKey:@"StripHeight"]; [aCoder encodeObject:_highlightColor forKey:@"HighlightColor"]; } - (NSRect)tabstripBounds { NSRect frame = [self bounds]; // frame.origin.y = frame.size.height - _stripHeight; frame.size.height = _stripHeight; return frame; } - (void)drawTab:(NSTabViewItem )tab inRect:(NSRect)frame { NSTabState state = [tab tabState]; if (state == NSPressedTab) { NSRect gradientRect = frame; gradientRect.size.height = 0.4; gradientRect.origin.y += frame.size.height - gradientRect.size.height; [cv_color_clicked setFill]; NSRectFill(frame); [cv_grad_clicked drawInRect:gradientRect angle:-90.0]; gradientRect.size.height = frame.size.height.2; gradientRect.origin.y = frame.origin.y; [cv_grad_clicked drawInRect:gradientRect angle:90.0]; } if (state == NSSelectedTab) { [_highlightColor setFill]; NSAffineTransform transform = [NSAffineTransform transform]; [transform translateXBy:frame.origin.x + (frame.size.width - [cv_triangle bounds].size.width).5 yBy:_stripHeight-17]; [[transform transformBezierPath:cv_triangle] fill]; frame.size.width -= .6; NSRectFill(frame); frame.size.width += .6; } NSRect cellRect = frame; [_labelCell setTitle:[tab label]]; cellRect.origin.y += (cellRect.size.height - [_labelCell cellSize].height).5; [_labelCell drawWithFrame:cellRect inView:self]; NSRect borderFrame = frame; borderFrame.origin.x += frame.size.width-1; borderFrame.size.width = 1.0; [cv_grad_back drawInRect:borderFrame angle:90.0]; if (state != NSSelectedTab) { borderFrame.origin.x = frame.origin.x; [cv_grad_rim drawInRect:borderFrame angle:-90.0]; } } - (void)drawRect:(NSRect)dirtyRect { NSRectClip(dirtyRect); NSRect frame = [self tabstripBounds]; frame.size.height -= (CGFloat)17; // frame.origin.y += 17; [cv_color_back setFill]; NSRectFill(frame); NSRect gradientRect = frame; gradientRect.size.height = .5; gradientRect.origin.y = frame.origin.y + frame.size.height-gradientRect.size.height; [cv_grad_back drawInRect:gradientRect angle:-90.0]; gradientRect.size.height = frame.size.height.1; gradientRect.origin.y = frame.origin.y; [cv_grad_back drawInRect:gradientRect angle:90.0]; gradientRect = frame; gradientRect.size.height = 1; gradientRect.origin.y += frame.size.height; [[NSColor colorWithDeviceWhite:1.0 alpha:0.7] setFill]; NSRectFill(gradientRect); frame.size.width = (CGFloat)0; for(NSTabViewItem tab in [self tabViewItems]) { [_labelCell setTitle:[tab label]]; NSSize tabSize = [_labelCell cellSize]; frame.origin.x += frame.size.width; frame.size.width = tabSize.width+8; frame.size.height = _stripHeight-17; if (!NSIntersectsRect(frame, dirtyRect)) continue; [self drawTab:tab inRect:frame]; } frame = [self tabstripBounds]; frame.size.height -= 17; frame.origin.x += frame.size.width-1; frame.size.width = 1; [cv_grad_back drawInRect:frame angle:90.0]; } - (NSRect)contentRect { NSRect bounds = [self bounds]; bounds.size.height -= _stripHeight+2; bounds.origin.y += _stripHeight+2; return bounds; } - (NSTabViewItem )tabViewItemAtPoint:(NSPoint)point { // I would like to point out that this method involves a hack that I am not in any way proud of if (point.y > _stripHeight-17) { // Because this is typically going to be called by the tabview to see where someone has // clicked, we force a redraw of the tabstrip bounds, since the tabview itself isn't going // to tell anything to redraw with the right bounds [self _setTabstripNeedsDisplay]; return nil; } double x = 0.0; for(NSTabViewItem tab in [self tabViewItems]) { [_labelCell setTitle:[tab label]]; double width = [_labelCell cellSize].width+8; if (x <= point.x && point.x < x+width) { [self _setTabstripNeedsDisplay]; return tab; } x += width; } [self _setTabstripNeedsDisplay]; return nil; } - (void)selectTabViewItem:(NSTabViewItem *)tabViewItem { [super selectTabViewItem:tabViewItem]; [self _setTabstripNeedsDisplay]; } - (void)dealloc { [_labelCell release]; [_highlightColor release]; [super dealloc]; } @end @implementation NTabView ( NTabViewPrivate ) - (void)_setTabstripNeedsDisplay { [self setNeedsDisplayInRect:[self tabstripBounds]]; } @end --v This sourcecode is licensed under the MIT license, as is the case with pretty much everything I write (although most of what I write and post on here is not licensed, I'm making an exception for this). I do not know if this works in GNUStep, so don't ask.

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