/
CPPopUpButton.j
749 lines (624 loc) · 18.4 KB
/
CPPopUpButton.j
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/*
* CPPopUpButton.j
* AppKit
*
* Created by Francisco Tolmasky.
* Copyright 2008, 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 "CPButton.j"
@import "CPGeometry.j"
@import "CPMenu.j"
@import "CPMenuItem.j"
#include "CoreGraphics/CGGeometry.h"
var VISIBLE_MARGIN = 7.0;
CPPopUpButtonStatePullsDown = CPThemeState("pulls-down");
/*!
@ingroup appkit
@class CPPopUpButton
A CPPopUpButton contains a pop-up menu of items that a user can select from.
*/
@implementation CPPopUpButton : CPButton
{
int _selectedIndex;
CPRectEdge _preferredEdge;
CPMenu _menu;
}
+ (CPString)themeClass
{
return "popup-button";
}
/*!
Initializes the pop-up button to the specified size.
@param aFrame the size for the button
@param shouldPullDown \c YES makes this a pull-down menu, \c NO makes it a pop-up menu.
@return the initialized pop-up button
*/
- (id)initWithFrame:(CGRect)aFrame pullsDown:(BOOL)shouldPullDown
{
self = [super initWithFrame:aFrame];
if (self)
{
_selectedIndex = CPNotFound;
_preferredEdge = CPMaxYEdge;
[self setValue:CPImageLeft forThemeAttribute:@"image-position"];
[self setValue:CPLeftTextAlignment forThemeAttribute:@"alignment"];
[self setValue:CPLineBreakByTruncatingTail forThemeAttribute:@"line-break-mode"];
[self setMenu:[[CPMenu alloc] initWithTitle:@""]];
[self setPullsDown:shouldPullDown];
}
return self;
}
- (id)initWithFrame:(CGRect)aFrame
{
return [self initWithFrame:aFrame pullsDown:NO];
}
// Setting the Type of Menu
/*!
Specifies whether the object is a pull-down or a pop-up menu.
@param shouldPullDown \c YES makes the pop-up button
a pull-down menu. \c NO makes it a pop-up menu.
*/
- (void)setPullsDown:(BOOL)shouldPullDown
{
if (shouldPullDown)
var changed = [self setThemeState:CPPopUpButtonStatePullsDown];
else
var changed = [self unsetThemeState:CPPopUpButtonStatePullsDown];
if (!changed)
return;
var items = [_menu itemArray];
if ([items count] <= 0)
return;
[items[0] setHidden:[self pullsDown]];
[self synchronizeTitleAndSelectedItem];
}
/*!
Returns \c YES if the button is a pull-down menu. \c NO if the button is a pop-up menu.
*/
- (BOOL)pullsDown
{
return [self hasThemeState:CPPopUpButtonStatePullsDown];
}
// Inserting and Deleting Items
/*!
Adds a new menu item using a CPMenuItem object.
*/
- (void)addItem:(CPMenuItem)anItem
{
[_menu addItem:anItem];
}
/*!
Adds a new menu item with the specified title.
@param the new menu item's tite
*/
- (void)addItemWithTitle:(CPString)aTitle
{
[_menu addItemWithTitle:aTitle action:NULL keyEquivalent:nil];
}
/*!
Adds multiple new menu items with the titles specified in the provided array.
@param titles an arry of names for the new items
*/
- (void)addItemsWithTitles:(CPArray)titles
{
var index = 0,
count = [titles count];
for (; index < count; ++index)
[self addItemWithTitle:titles[index]];
}
/*!
Inserts a new item with the specified title and index location.
@param aTitle the new itme's title
@param anIndex the item's index in the menu
*/
- (void)insertItemWithTitle:(CPString)aTitle atIndex:(int)anIndex
{
var items = [self itemArray],
count = [items count];
while (count--)
if ([items[count] title] == aTitle)
[self removeItemAtIndex:count];
[_menu insertItemWithTitle:aTitle action:NULL keyEquivalent:nil atIndex:anIndex];
}
/*!
Removes all menu items from the pop-up button's menu
*/
- (void)removeAllItems
{
var count = [_menu numberOfItems];
while (count--)
[_menu removeItemAtIndex:0];
}
/*!
Removes a menu item with the specified title from the button.
@param aTitle the title of the item to remove
*/
- (void)removeItemWithTitle:(CPString)aTitle
{
[self removeItemAtIndex:[self indexOfItemWithTitle:aTitle]];
[self synchronizeTitleAndSelectedItem];
}
/*!
Removes the menu item at the specified index
@param anIndex the index of the item to remove
*/
- (void)removeItemAtIndex:(int)anIndex
{
[_menu removeItemAtIndex:anIndex];
[self synchronizeTitleAndSelectedItem];
}
// Getting the User's Selection
/*!
Returns the selected item or \c nil if no item is selected.
*/
- (CPMenuItem)selectedItem
{
if (_selectedIndex < 0 || _selectedIndex > [self numberOfItems] - 1)
return nil;
return [_menu itemAtIndex:_selectedIndex];
}
/*!
Returns the title of the selected item or \c nil if no item is selected.
*/
- (CPString)titleOfSelectedItem
{
return [[self selectedItem] title];
}
/*!
Returns the index of the selected item. If no item is selected, it returns CPNotFound.
*/
- (int)indexOfSelectedItem
{
return _selectedIndex;
}
// For us, CPNumber is toll-free bridged to Number, so just return the selected index.
/*!
Returns the selected item's index. If no item is selected, it returns CPNotFound.
*/
- (id)objectValue
{
return _selectedIndex;
}
// Setting the Current Selection
/*!
Selects the specified menu item.
@param aMenuItem the item to select
*/
- (void)selectItem:(CPMenuItem)aMenuItem
{
[self selectItemAtIndex:[self indexOfItem:aMenuItem]];
}
/*!
Selects the item at the specified index
@param anIndex the index of the item to select
*/
- (void)selectItemAtIndex:(int)anIndex
{
if (_selectedIndex == anIndex)
return;
if (_selectedIndex >= 0 && ![self pullsDown])
[[self selectedItem] setState:CPOffState];
_selectedIndex = anIndex;
if (_selectedIndex >= 0 && ![self pullsDown])
[[self selectedItem] setState:CPOnState];
[self synchronizeTitleAndSelectedItem];
}
/*!
Selects the menu item with the specified tag
@param the tag of the item to select
*/
- (void)selectItemWithTag:(int)aTag
{
[self selectItemAtIndex:[self indexOfItemWithTag:aTag]];
}
/*!
Selects the item with the specified title
@param the title of the item to select
*/
- (void)selectItemWithTitle:(CPString)aTitle
{
[self selectItemAtIndex:[self indexOfItemWithTitle:aTitle]];
}
/*!
Sets the object for the selected item. If no item is selected, then this method has no effect.
@param the object set for the selected item
*/
- (void)setObjectValue:(id)aValue
{
[self selectItemAtIndex:[aValue intValue]];
}
// Getting Menu Items
/*!
Returns the button's menu of items.
*/
- (CPMenu)menu
{
return _menu;
}
/*!
Sets the menu for the button
*/
- (void)setMenu:(CPMenu)aMenu
{
if (_menu === aMenu)
return;
var defaultCenter = [CPNotificationCenter defaultCenter];
if (_menu)
{
[defaultCenter
removeObserver:self
name:CPMenuDidAddItemNotification
object:_menu];
[defaultCenter
removeObserver:self
name:CPMenuDidChangeItemNotification
object:_menu];
[defaultCenter
removeObserver:self
name:CPMenuDidRemoveItemNotification
object:_menu];
}
_menu = aMenu;
if (_menu)
{
[defaultCenter
addObserver:self
selector:@selector(menuDidAddItem:)
name:CPMenuDidAddItemNotification
object:_menu];
[defaultCenter
addObserver:self
selector:@selector(menuDidChangeItem:)
name:CPMenuDidChangeItemNotification
object:_menu];
[defaultCenter
addObserver:self
selector:@selector(menuDidRemoveItem:)
name:CPMenuDidRemoveItemNotification
object:_menu];
}
[self synchronizeTitleAndSelectedItem];
}
/*!
Returns a count of the number of items in the button's menu.
*/
- (int)numberOfItems
{
return [_menu numberOfItems];
}
/*!
Returns an array of the items in the menu
*/
- (CPArray)itemArray
{
return [_menu itemArray];
}
/*!
Returns the item at the specified index or \c nil if the item does not exist.
@param anIndex the index of the item to obtain
*/
- (CPMenuItem)itemAtIndex:(unsigned)anIndex
{
return [_menu itemAtIndex:anIndex];
}
/*!
Returns the title of the item at the specified index or \c nil if no item exists.
@param anIndex the index of the item
*/
- (CPString)itemTitleAtIndex:(unsigned)anIndex
{
return [[_menu itemAtIndex:anIndex] title];
}
/*!
Returns an array of all the menu item titles.
*/
- (CPArray)itemTitles
{
var titles = [],
items = [self itemArray],
index = 0,
count = [items count];
for (; index < count; ++index)
items.push([items[index] title]);
}
/*!
Returns the menu item with the specified title.
@param aTitle the title of the desired menu item
*/
- (CPMenuItem)itemWithTitle:(CPString)aTitle
{
return [_menu itemAtIndex:[_menu indexOfItemWithTitle:aTitle]];
}
/*!
Returns the last menu item
*/
- (CPMenuItem)lastItem
{
return [[_menu itemArray] lastObject];
}
// Getting the Indices of Menu Items
/*!
Returns the index of the specified item or CPNotFound if the item is not in the list.
@param aMenuItem the item to obtain the index for
*/
- (int)indexOfItem:(CPMenuItem)aMenuItem
{
return [_menu indexOfItem:aMenuItem];
}
/*!
Returns the index of the item with the specified tag or CPNotFound if the item is not in the list.
@param aTag the item's tag
*/
- (int)indexOfItemWithTag:(int)aTag
{
return [_menu indexOfItemWithTag:aTag];
}
/*!
Returns the index of the item with the specified title or CPNotFound.
@param aTitle the item's titel
*/
- (int)indexOfItemWithTitle:(CPString)aTitle
{
return [_menu indexOfItemWithTitle:aTitle];
}
/*!
Returns the index of the item with the specified
represented object or CPNotFound
if a match does not exist.
@param anObject the item's represented object
*/
- (int)indexOfItemWithRepresentedObject:(id)anObject
{
return [_menu indexOfItemWithRepresentedObject:anObject];
}
/*!
Returns the index of the item with the specified target
and action. Returns CPNotFound if the no
such item is in the list.
@param aTarget the item's target
@param anAction the item's action
*/
- (int)indexOfItemWithTarget:(id)aTarget action:(SEL)anAction
{
return [_menu indexOfItemWithTarget:aTarget action:anAction];
}
// Setting the Cell Edge to Pop out in Restricted Situations
/*!
Returns the button's edge where the pop-up menu will be
displayed when there is not enough room to display directly
above the button.
*/
- (CPRectEdge)preferredEdge
{
return _preferredEdge;
}
/*!
Sets the preffered edge of the button to display the
pop-up when there is a limited amount of screen space.
By default, the pop-up should draw on top of the button.
*/
- (void)setPreferredEdge:(CPRectEdge)aRectEdge
{
_preferredEdge = aRectEdge;
}
// Setting the Title
/*!
Sets the pop-up button's title.
@param aTitle the new title
*/
- (void)setTitle:(CPString)aTitle
{
if ([self title] === aTitle)
return;
if ([self pullsDown])
{
var items = [_menu itemArray];
if ([items count] <= 0)
[self addItemWithTitle:aTitle];
else
{
[items[0] setTitle:aTitle];
[self synchronizeTitleAndSelectedItem];
}
}
else
{
var index = [self indexOfItemWithTitle:aTitle];
if (index < 0)
{
[self addItemWithTitle:aTitle];
index = [self numberOfItems] - 1;
}
[self selectItemAtIndex:index];
}
}
// Setting the Image
/*!
This method has no effect. Because the image is taken
from the currently selected item, this method serves
no purpose.
*/
- (void)setImage:(CPImage)anImage
{
// The Image is set by the currently selected item.
}
// Setting the State
/*!
Makes sure the selected item and the item
being displayed are one and the same.
*/
- (void)synchronizeTitleAndSelectedItem
{
var item = nil;
if ([self pullsDown])
{
var items = [_menu itemArray];
if ([items count] > 0)
item = items[0];
}
else
item = [self selectedItem];
[super setImage:[item image]];
[super setTitle:[item title]];
}
//
/*!
Called when the menu has a new item added to it.
@param aNotification information about the event
*/
- (void)menuDidAddItem:(CPNotification)aNotification
{
var index = [[aNotification userInfo] objectForKey:@"CPMenuItemIndex"];
if (_selectedIndex < 0)
[self selectItemAtIndex:0];
else if (index == _selectedIndex)
[self synchronizeTitleAndSelectedItem];
else if (index < _selectedIndex)
++_selectedIndex;
if (index == 0 && [self pullsDown])
{
var items = [_menu itemArray];
[items[0] setHidden:YES];
if (items.length > 0)
[items[1] setHidden:NO];
}
var item = [_menu itemArray][index],
action = [item action];
if (!action || (action === @selector(_popUpItemAction:)))
{
[item setTarget:self];
[item setAction:@selector(_popUpItemAction:)];
}
}
/*!
Called when a menu item has changed.
@param aNotification information about the event
*/
- (void)menuDidChangeItem:(CPNotification)aNotification
{
var index = [[aNotification userInfo] objectForKey:@"CPMenuItemIndex"];
if ([self pullsDown] && index != 0)
return;
if (![self pullsDown] && index != _selectedIndex)
return;
[self synchronizeTitleAndSelectedItem];
}
/*!
Called when an item was removed from the menu.
@param aNotification information about the event
*/
- (void)menuDidRemoveItem:(CPNotification)aNotification
{
var numberOfItems = [self numberOfItems];
if (numberOfItems <= _selectedIndex && numberOfItems > 0)
[self selectItemAtIndex:numberOfItems - 1];
else
[self synchronizeTitleAndSelectedItem];
}
- (void)mouseDown:(CPEvent)anEvent
{
if (![self isEnabled] || ![self numberOfItems])
return;
[self highlight:YES];
var menu = [self menu],
bounds = [self bounds],
minimumWidth = CGRectGetWidth(bounds);
// FIXME: setFont: should set the font on the menu.
[menu setFont:[self font]];
if ([self pullsDown])
{
var positionedItem = nil,
location = CGPointMake(0.0, CGRectGetMaxY(bounds));
}
else
{
var contentRect = [self contentRectForBounds:bounds],
positionedItem = [self selectedItem],
standardLeftMargin = [_CPMenuWindow _standardLeftMargin] + [_CPMenuItemStandardView _standardLeftMargin],
location = CGPointMake(CGRectGetMinX(contentRect) - standardLeftMargin, 0.0);
minimumWidth += standardLeftMargin;
}
[menu setMinimumWidth:minimumWidth];
[menu
_popUpMenuPositioningItem:positionedItem
atLocation:location
topY:CGRectGetMinY(bounds)
bottomY:CGRectGetMaxY(bounds)
inView:self
callback:function(aMenu)
{
[self highlight:NO];
var highlightedItem = [aMenu highlightedItem];
if ([highlightedItem _isSelectable])
[self selectItem:highlightedItem];
}];
/*
else
{
// This is confusing, I KNOW, so let me explain it to you.
// We want the *content* of the selected menu item to overlap the *content* of our pop up.
// 1. So calculate where our content is, then calculate where the menu item is.
// 2. Move LEFT by whatever indentation we have (offsetWidths, aka, window margin, item margin, etc).
// 3. MOVE UP by the difference in sizes of the content and menu item, this will only work if the content is vertically centered.
var contentRect = [self convertRect:[self contentRectForBounds:bounds] toView:nil],
menuOrigin = [theWindow convertBaseToGlobal:contentRect.origin],
menuItemRect = [menuWindow rectForItemAtIndex:_selectedIndex];
menuOrigin.x -= CGRectGetMinX(menuItemRect) + [menuWindow overlapOffsetWidth] + [[[menu itemAtIndex:_selectedIndex] _menuItemView] overlapOffsetWidth];
menuOrigin.y -= CGRectGetMinY(menuItemRect) + (CGRectGetHeight(menuItemRect) - CGRectGetHeight(contentRect)) / 2.0;
}
*/
}
- (void)_popUpItemAction:(id)aSender
{
[self sendAction:[self action] to:[self target]];
}
@end
var CPPopUpButtonMenuKey = @"CPPopUpButtonMenuKey",
CPPopUpButtonSelectedIndexKey = @"CPPopUpButtonSelectedIndexKey",
CPPopUpButtonPullsDownKey = @"CPPopUpButtonPullsDownKey";
@implementation CPPopUpButton (CPCoding)
/*!
Initializes the pop-up button with data from the
specified coder.
@param aCoder the coder from which to read
the data
@return the initialized pop-up button
*/
- (id)initWithCoder:(CPCoder)aCoder
{
self = [super initWithCoder:aCoder];
if (self)
{
// Nothing is currently selected
_selectedIndex = -1;
[self setMenu:[aCoder decodeObjectForKey:CPPopUpButtonMenuKey]];
[self selectItemAtIndex:[aCoder decodeObjectForKey:CPPopUpButtonSelectedIndexKey]];
}
return self;
}
/*!
Encodes the data of the pop-up button into a coder
@param aCoder the coder to which the data
will be written
*/
- (void)encodeWithCoder:(CPCoder)aCoder
{
[super encodeWithCoder:aCoder];
[aCoder encodeObject:_menu forKey:CPPopUpButtonMenuKey];
[aCoder encodeInt:_selectedIndex forKey:CPPopUpButtonSelectedIndexKey];
}
@end