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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Richard Schreyer
* Josh Aas <josh@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#import "ToolTip.h"
#import "NSScreen+Utils.h"
@interface ToolTip (ToolTipPrivateMethods)
- (void)parentWindowDidResignKey:(NSNotification*)inNotification;
@end
const float kBorderPadding = 2.0;
const float kMaxTextFieldWidth = 250.0;
const float kVOffset = 20.0;
@implementation ToolTip
- (id)init
{
if ((self = [super init]))
{
// the ref from -alloc is balanced by the -release in dealloc
mTooltipWindow = [[NSWindow alloc] initWithContentRect:NSMakeRect(0.0, 0.0, kMaxTextFieldWidth, 0.0)
styleMask:NSBorderlessWindowMask
backing:NSBackingStoreBuffered
defer:YES];
// we don't want closing the window to release it, because we aren't always in control
// of the close (AppKit may do it on quit).
[mTooltipWindow setReleasedWhenClosed:NO];
// Create a textfield as the content of our new window.
// Field occupies all but the top 2 and bottom 2 pixels of the panel (bug 149635)
mTextView = [[NSTextView alloc] initWithFrame:NSMakeRect(0.0, kBorderPadding, kMaxTextFieldWidth, 0.0)];
[[mTooltipWindow contentView] addSubview:mTextView];
[mTextView release]; // window holds ref
// set up the panel
[mTooltipWindow setHasShadow:YES];
[mTooltipWindow setBackgroundColor:[NSColor colorWithCalibratedRed:1.0 green:1.0 blue:0.81 alpha:1.0]];
// set up the text view
[mTextView setDrawsBackground:NO];
[mTextView setEditable:NO];
[mTextView setSelectable:NO];
[mTextView setFont:[NSFont toolTipsFontOfSize:[NSFont smallSystemFontSize]]];
[mTextView setMinSize:NSMakeSize(0.0, 0.0)];
[mTextView setHorizontallyResizable:YES];
[mTextView setVerticallyResizable:YES];
}
return self;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[mTooltipWindow close]; // we set the window not to release on -close
[mTooltipWindow release];
[super dealloc];
}
- (void)showToolTipAtPoint:(NSPoint)windowPoint
withString:(NSString*)string
overWindow:(NSWindow*)inWindow
{
if ([string length] == 0)
return;
NSPoint point = [inWindow convertBaseToScreen:windowPoint];
NSScreen* screen = [NSScreen screenForPoint:point];
if (!screen)
screen = [NSScreen mainScreen];
if (!screen)
return;
// register for window losing key status notifications, so we can hide the tooltip
// on window deactivation
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(parentWindowDidResignKey:)
name:NSWindowDidResignKeyNotification
object:inWindow];
NSRect screenFrame = [screen visibleFrame];
NSSize screenSize = screenFrame.size;
// for some reason, text views suffer from hysteresis; the answer you get this time
// depends on what you had in there before. so clear state first.
[mTextView setString:@""];
[mTextView setFrame:NSMakeRect(0, kBorderPadding, 0, 0)];
// -sizeToFit sucks. For some reason it likes to wrap short words, so
// we measure the text by hand and set that as the min width.
NSSize stringSize = [string sizeWithAttributes:[NSDictionary dictionaryWithObject:[NSFont toolTipsFontOfSize:[NSFont smallSystemFontSize]] forKey:NSFontAttributeName]];
float textViewWidth = ceil(stringSize.width);
if (textViewWidth > kMaxTextFieldWidth)
textViewWidth = kMaxTextFieldWidth;
textViewWidth += 2.0 * 5.0; // magic numbers required to make the text not wrap. No, this isn't -textContainerInset.
// set up the text view
[mTextView setMaxSize:NSMakeSize(kMaxTextFieldWidth, screenSize.height - 2 * kBorderPadding)]; // do this here since we know screen size
[mTextView setString:string]; // do this after setting max size, before setting constrained frame size,
// reset to max width - it will not grow horizontally when resizing, only vertically
[mTextView setConstrainedFrameSize:NSMakeSize(kMaxTextFieldWidth, 0.0)];
// to avoid wrapping when we don't want it, set the min width
[mTextView setMinSize:NSMakeSize(textViewWidth, 0.0)];
// finally, do the buggy sizeToFit
[mTextView sizeToFit];
// The first time we sizeToFit a text field on Leopard, it decides that
// 0 would be a good height. We disagree, so make it try again.
NSRect textViewFrame = [mTextView frame];
if (textViewFrame.size.height < 1.0) {
[mTextView sizeToFit];
textViewFrame = [mTextView frame];
}
// set the origin back where its supposed to be
[mTextView setFrameOrigin:NSMakePoint(0, kBorderPadding)];
// size the panel correctly, taking border into account
NSSize textSize = textViewFrame.size;
textSize.height += kBorderPadding + kBorderPadding;
[mTooltipWindow setContentSize:textSize];
// We try to put the top left point right below the cursor. If that doesn't fit
// on screen, put the bottom left point above the cursor.
if (point.y - kVOffset - textSize.height > NSMinY(screenFrame)) {
point.y -= kVOffset;
[mTooltipWindow setFrameTopLeftPoint:point];
}
else {
point.y += kVOffset / 2.5;
[mTooltipWindow setFrameOrigin:point];
}
// if it doesn't fit on screen horizontally, adjust so that it does
float amountOffScreenX = NSMaxX(screenFrame) - NSMaxX([mTooltipWindow frame]);
if (amountOffScreenX < 0) {
NSRect movedFrame = [mTooltipWindow frame];
movedFrame.origin.x += amountOffScreenX;
[mTooltipWindow setFrame:movedFrame display:NO];
}
// add as a child window
[inWindow addChildWindow:mTooltipWindow ordered:NSWindowAbove];
// show the panel
[mTooltipWindow orderFront:nil];
}
- (void)closeToolTip
{
// we can get -closeToolTip even if we didn't show it
if ([mTooltipWindow isVisible])
{
[[mTooltipWindow parentWindow] removeChildWindow:mTooltipWindow];
[mTooltipWindow orderOut:nil];
}
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)parentWindowDidResignKey:(NSNotification*)inNotification
{
[self closeToolTip];
}
@end
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