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// -*- mode:objc -*-
// $Id: PTYScrollView.m,v 1.23 2008-09-09 22:10:05 yfabian Exp $
/*
** PTYScrollView.m
**
** Copyright (c) 2002, 2003
**
** Author: Fabian, Ujwal S. Setlur
** Initial code by Kiichi Kusama
**
** Project: iTerm
**
** Description: NSScrollView subclass. Handles scroll detection and background images.
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
// Debug option
#define DEBUG_ALLOC 0
#define DEBUG_METHOD_TRACE 0
#import <iTerm/iTerm.h>
#import <iTerm/PTYScrollView.h>
#import <iTerm/PTYTextView.h>
#import <PreferencePanel.h>
@implementation PTYScroller
- (id)init
{
userScroll=NO;
return [super init];
}
+ (BOOL)isCompatibleWithOverlayScrollers
{
return YES;
}
- (void) mouseDown: (NSEvent *)theEvent
{
[super mouseDown:theEvent];
if ([self floatValue] != 1) {
userScroll = YES;
} else {
userScroll = NO;
}
}
- (void)trackScrollButtons:(NSEvent *)theEvent
{
[super trackScrollButtons:theEvent];
if ([self floatValue] != 1) {
userScroll = YES;
} else {
userScroll = NO;
}
}
- (void)trackKnob:(NSEvent *)theEvent
{
[super trackKnob:theEvent];
if ([self floatValue] != 1) {
userScroll = YES;
} else {
userScroll = NO;
}
}
- (BOOL)userScroll
{
return userScroll;
}
- (void)setUserScroll:(BOOL)scroll
{
userScroll = scroll;
}
- (NSScrollerPart)hitPart
{
return [super hitPart];
}
@end
@implementation PTYScrollView
- (void) dealloc
{
[backgroundImage release];
[super dealloc];
}
- (id)initWithFrame:(NSRect)frame
{
if ((self = [super initWithFrame:frame]) == nil) {
return nil;
}
assert([self contentView] != nil);
PTYScroller *aScroller;
aScroller = [[PTYScroller alloc] init];
[self setVerticalScroller:aScroller];
[aScroller release];
return self;
}
- (void)drawBackgroundImageRect:(NSRect)rect useTransparency:(BOOL)useTransparency
{
[self drawBackgroundImageRect:rect
toPoint:NSMakePoint(rect.origin.x,
rect.origin.y + rect.size.height)
useTransparency:useTransparency];
}
- (void)drawBackgroundImageRect:(NSRect)rect toPoint:(NSPoint)dest useTransparency:(BOOL)useTransparency
{
NSRect srcRect;
// resize image if we need to
if ([backgroundImage size].width != [self documentVisibleRect].size.width ||
[backgroundImage size].height != [self documentVisibleRect].size.height) {
[backgroundImage setSize: [self documentVisibleRect].size];
}
srcRect = rect;
// normalize to origin of visible rectangle
srcRect.origin.y -= [self documentVisibleRect].origin.y;
// do a vertical flip of coordinates
srcRect.origin.y = [backgroundImage size].height - srcRect.origin.y - srcRect.size.height - VMARGIN;
// draw the image rect
[[self backgroundImage] compositeToPoint:dest
fromRect:srcRect
operation:NSCompositeCopy
fraction:useTransparency ? (1.0 - [self transparency]) : 1];
}
- (void)scrollWheel:(NSEvent *)theEvent
{
PTYScroller *verticalScroller = (PTYScroller *)[self verticalScroller];
NSRect scrollRect;
scrollRect = [self documentVisibleRect];
scrollRect.origin.y -= [theEvent deltaY] * [self verticalLineScroll];
[[self documentView] scrollRectToVisible: scrollRect];
scrollRect = [self documentVisibleRect];
if(scrollRect.origin.y+scrollRect.size.height < [[self documentView] frame].size.height)
[verticalScroller setUserScroll: YES];
else
[verticalScroller setUserScroll: NO];
}
- (void)detectUserScroll
{
NSRect scrollRect;
PTYScroller *verticalScroller = (PTYScroller *)[self verticalScroller];
scrollRect= [self documentVisibleRect];
if(scrollRect.origin.y+scrollRect.size.height < [[self documentView] frame].size.height)
[verticalScroller setUserScroll: YES];
else
[verticalScroller setUserScroll: NO];
}
// background image
- (NSImage *) backgroundImage
{
return (backgroundImage);
}
- (void) setBackgroundImage: (NSImage *) anImage
{
[backgroundImage release];
[anImage retain];
backgroundImage = anImage;
[backgroundImage setScalesWhenResized: YES];
[backgroundImage setSize: [self documentVisibleRect].size];
}
- (float) transparency
{
return (transparency);
}
- (void)setTransparency:(float)theTransparency
{
if (theTransparency >= 0 && theTransparency <= 1) {
transparency = theTransparency;
[self setNeedsDisplay:YES];
}
}
@end