Home » U++ Library support » ArrayCtrl, HeaderCtrl & GridCtrl » ArrayCtrl cell color
| Re: ArrayCtrl cell color [message #3808 is a reply to message #3805] |
Tue, 27 June 2006 22:06   |
hojtsy
Messages: 241
Registered: January 2006
Location: Budapest, Hungary
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Experienced Member |
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| forlano wrote on Tue, 27 June 2006 14:13 |
1) This line is very important:
array.AddColumn("value").SetDisplay(Single<NumbersOnRed>());
Now, SetDisplay is the method with arguments:
SetDisplay(int i¸ int j¸ const Display& d)
Instead I see "Single<NumbersOnRed>()" that does the job... but HOW? What is it?
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A different SetDisplay is called there. This one:
ArrayCtrl::Column& ArrayCtrl::Column::SetDisplay(const Display& d);
The reason for that is that AddColumn does not return a reference to the array, but to the newly added column. You are setting the Display object for the newly added column, and not the whole array.
So this trick is not done by the Single template method. What it does instead is that it returns a reference to an internally stored "singleton" instance of a given type. Search for "singleton pattern" on google for more info about singletons.
| forlano wrote on Tue, 27 June 2006 14:13 |
2) The last stupid question. Is "q" the cell value? Where it has been defined?
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The "q" is the cell value, it is defined as a function parameter to the PaintBackground, and Paint methods of Display. The name of the parameter is freely choosen, I put q, because Paint method had it originally this way. The type of q is Value, which is the magical joker type in U++, able to store values of practically any other type. This way the fields of the ArrayCtrl could be Strings, ints, doubles, or even instances of some complex class type.
And: there are no stupid questions.
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ArrayCtrl cell color
By: hojtsy on Wed, 01 February 2006 16:29 |
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Re: ArrayCtrl cell color
By: mirek on Wed, 01 February 2006 17:59 |
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Re: ArrayCtrl cell color
By: hojtsy on Thu, 02 February 2006 16:51 |
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Re: ArrayCtrl cell color
By: mirek on Thu, 02 February 2006 20:43 |
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Re: ArrayCtrl cell color
By: hojtsy on Thu, 02 February 2006 21:46 |
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Re: ArrayCtrl cell color
By: mirek on Thu, 02 February 2006 22:10 |
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Re: ArrayCtrl cell color
By: hojtsy on Thu, 02 February 2006 22:46 |
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Re: ArrayCtrl cell color
By: mirek on Thu, 02 February 2006 23:11 |
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Re: ArrayCtrl cell color
By: hojtsy on Fri, 03 February 2006 00:06 |
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Re: ArrayCtrl cell color
By: mirek on Fri, 03 February 2006 14:29 |
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Re: ArrayCtrl cell color
By: hojtsy on Fri, 03 February 2006 15:28 |
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Re: ArrayCtrl cell color
By: mirek on Fri, 03 February 2006 16:38 |
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Re: ArrayCtrl cell color
By: hojtsy on Fri, 03 February 2006 16:48 |
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Re: ArrayCtrl cell color
By: mirek on Fri, 03 February 2006 17:56 |
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Re: ArrayCtrl cell color
By: fudadmin on Mon, 06 February 2006 06:20 |
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Re: ArrayCtrl cell color
By: hojtsy on Tue, 07 February 2006 13:43 |
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Re: ArrayCtrl cell color
By: forlano on Tue, 27 June 2006 20:13 |
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Re: ArrayCtrl cell color
By: hojtsy on Tue, 27 June 2006 22:06 |
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Re: ArrayCtrl cell color
By: forlano on Wed, 28 June 2006 00:49 |
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Re: ArrayCtrl cell color
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Re: ArrayCtrl cell color
By: mirek on Wed, 28 June 2006 14:13 |
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Re: ArrayCtrl cell color
By: forlano on Wed, 28 June 2006 16:26 |
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Re: ArrayCtrl cell color
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Re: ArrayCtrl cell color
By: mirek on Sun, 19 February 2006 23:48 |
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