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/** <title>GSSlideView</title>
Copyright (C) 2002, 2003 Free Software Foundation, Inc.
Created by: Enrico Sersale <enrico@imago.ro>
Date: Jan 2002
Author: Fred Kiefer <fredkiefer@gmx.de>
Date: Jan 2003
Removed all dependencies on X and moved to gui.
This file is part of the GNU Objective C User Interface Library.
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 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; see the file COPYING.LIB.
If not, see <http://www.gnu.org/licenses/> or write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#import <Foundation/NSDebug.h>
#import "AppKit/NSApplication.h"
#import "AppKit/NSCell.h"
#import "AppKit/NSEvent.h"
#import "AppKit/NSImage.h"
#import "AppKit/NSView.h"
#import "AppKit/NSWindow.h"
#import "GNUstepGUI/GSDisplayServer.h"
#import "GSSlideView.h"
#include <math.h>
// Minimal slide distance per step in pixel
#define MINDIST 18
// Time for each slide step in seconds
#define SLIDE_TIME_STEP 0.02
@interface GSSlideView (Private)
- (void) _setupImage: (NSImage*) image startPoint: (NSPoint)slideStart;
- (void) _slideFrom: (NSPoint)fromPoint to: (NSPoint)toPoint;
@end
@implementation GSSlideView (Private)
- (void) _setupImage: (NSImage*) image startPoint: (NSPoint)slideStart
{
NSSize imageSize = [image size];
[slideCell setImage: image];
[_window setFrame: NSMakeRect(slideStart.x, slideStart.y,
imageSize.width, imageSize.height)
display: NO];
// Only display the image
[GSServerForWindow(_window) restrictWindow: [_window windowNumber]
toImage: image];
[_window orderFrontRegardless];
}
- (void) _slideFrom: (NSPoint)fromPoint to: (NSPoint)toPoint
{
float distx = toPoint.x - fromPoint.x;
float disty = toPoint.y - fromPoint.y;
float dist = sqrt((distx * distx) + (disty * disty));
// int steps = (int)(dist / MINDIST);
NSSize imgSize = [[slideCell image] size];
float imgDist = sqrt((imgSize.width * imgSize.width) +
(imgSize.height * imgSize.height));
int steps = (int)(dist/imgDist);
int windowNumber = [_window windowNumber];
GSDisplayServer *server = GSServerForWindow(_window);
if (steps > 2)
{
float unitx = distx / steps;
float unity = disty / steps;
[NSEvent startPeriodicEventsAfterDelay: SLIDE_TIME_STEP
withPeriod: SLIDE_TIME_STEP];
while (steps--)
{
NSEvent *theEvent = [NSApp nextEventMatchingMask: NSPeriodicMask
untilDate: [NSDate distantFuture]
inMode: NSEventTrackingRunLoopMode
dequeue: YES];
if ([theEvent type] == NSPeriodic)
{
fromPoint.x += unitx;
fromPoint.y += unity;
[server movewindow: fromPoint : windowNumber];
}
else
{
NSDebugLLog (@"NSDragging",
@"Unexpected event type: %d during slide",
(int)[theEvent type]);
}
}
[NSEvent stopPeriodicEvents];
}
// Go exactly to the point
[server movewindow: toPoint : windowNumber];
}
@end
@implementation GSSlideView
+ (BOOL) _slideImage: (NSImage *)image
from: (NSPoint)fromPoint
to: (NSPoint)toPoint
{
static GSSlideView *v = nil;
BOOL result = NO;
if (image != nil)
{
if (v == nil)
{
v = [[self alloc] init];
}
[NSApp preventWindowOrdering];
[v _setupImage: image startPoint: fromPoint];
[v _slideFrom: fromPoint to: toPoint];
[[v window] orderOut: nil];
result = YES;
}
return result;
}
- (id) init
{
self = [super init];
if (self != nil)
{
// This is never used, as the window gets resized before displaying
NSRect winRect = {{0, 0}, {48, 48}};
NSWindow *slideWindow;
slideCell = [[NSCell alloc] initImageCell: nil];
[slideCell setBordered: NO];
slideWindow = [[NSWindow alloc] initWithContentRect: winRect
styleMask: NSBorderlessWindowMask
backing: NSBackingStoreNonretained
defer: NO];
[slideWindow setReleasedWhenClosed: YES];
[slideWindow setExcludedFromWindowsMenu: YES];
[slideWindow setContentView: self];
RELEASE (self);
}
return self;
}
- (void) dealloc
{
RELEASE (slideCell);
[super dealloc];
}
- (void) drawRect: (NSRect)rect
{
[slideCell drawWithFrame: [self frame] inView: self];
}
@end
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