[Kde-bindings] TreeWidgetItem problems

[Miquel]

En/na Richard Dale ha escrit:
> On Thursday 17 May 2007, Miquel wrote:
>   
>> Hi there
>>
>> I'm trying to code a Tree using ruby qt bindings (Qt v4.2.0 using
>> aboutQt() info).
>>
>> This is my code.
>>
>> 	@tree = Qt::TreeWidget.new(self)
>> 	self.setCentralWidget(@tree)
>>
>> 	@rootItem = Qt::TreeWidgetItem.new(@tree)
>> 	@rootItem.setText(0, "Root")
>>
>> 	0.upto(10) do |index|
>> 		item = Qt::TreeWidgetItem.new(@rootItem)
>> 		item.setText(0, "Node#{index}")
>> 	end
>>
>> The problem is in 'item = Qt::TreeWidgetItem.new(@rootItem)', system
>> tells me:
>>
>> unresolved constructor call Qt::TreeWidgetItem (ArgumentError)
>>
>> and reading Qt documentation there are two constructors allowed:
>>
>> QTreeWidgetItem ( QTreeWidget * parent, int type = Type )
>> QTreeWidgetItem ( QTreeWidgetItem * parent, int type = Type )
>>
>> The first one is used in the @rootNode object creation and the second
>> one is the one which produces this message.
>>
>> Can anybody help me?
>>     
> I've tried it with QtRuby in the kde svn and Qt 4.3 from the current qt-copy, 
> and it seems to work fine:
>
> mardigras rdale 563% irb -rQt
> irb(main):001:0> app = Qt::Application.new(ARGV)
> => #<Qt::Application:0xb7c71930 objectName="irb">
> irb(main):002:0> @tree = Qt::TreeWidget.new
> => #<Qt::TreeWidget:0xb7a948d8 objectName="", x=0, y=0, width=640, height=480>
> irb(main):003:0> @rootItem = Qt::TreeWidgetItem.new(@tree)
> => #<Qt::TreeWidgetItem:0xb7a65128>
> irb(main):004:0> item = Qt::TreeWidgetItem.new(@rootItem)
> => #<Qt::TreeWidgetItem:0xb7a469f8 parent=#<Qt::TreeWidgetItem:0xb7a65128>>
>
> What do you get if you do 'rbqtapi Qt::TreeWidgetItem' - is the constructor 
> there in your version of the smoke library? Is @rootItem nil for some reason?
>
> -- Richard
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>
>   
Hi richard

I have resolved the problem adding Qt::TreeWidgetItem::Type to the 
constructor like this:

    item = Qt::TreeWidgetItem.new(@rootItem, Qt::TreeWidgetItem::Type)

but if you read the Qt class docs, Type is an optional parameter :-(

The rbqtapi output is :

QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem() QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(QTreeWidgetItem*) QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(QTreeWidget*) QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(const QTreeWidgetItem&)
QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(QTreeWidget*,
QTreeWidgetItem*) QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(QTreeWidgetItem*, QTreeWidgetItem*)
QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(QTreeWidget*,
QTreeWidgetItem*, int) QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(QTreeWidgetItem*, QTreeWidgetItem*,
int) QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(QTreeWidgetItem*, int)
QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(QTreeWidget*, int)
QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(QTreeWidget*, const
QStringList&) QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(QTreeWidgetItem*, const QStringList&)
QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(QTreeWidget*, const
QStringList&, int) QTreeWidgetItem*
QTreeWidgetItem::QTreeWidgetItem(QTreeWidgetItem*, const QStringList&,
int) QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(int)
QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(const QStringList&)
QTreeWidgetItem* QTreeWidgetItem::QTreeWidgetItem(const QStringList&,
int)

I'm lost, because 

QTreeWidgetItem::QTreeWidgetItem(QTreeWidgetItem*) QTreeWidgetItem*

should satisfy my needs, shouldn't it?

Thanks for your help

Bye


    Miquel