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How to move a selected item up/down in List Box?
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Hi guys:
I am using Borland C++ Builder to make a window application. I need to use a list box to display the items I selected. Besides, I need to chang the order of the selected items in the box. Could any body please give me a clue how I can do this?
Thanks in advance!
Doug
I am using Borland C++ Builder to make a window application. I need to use a list box to display the items I selected. Besides, I need to chang the order of the selected items in the box. Could any body please give me a clue how I can do this?
Thanks in advance!
Doug
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Join Date: Aug 2005
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I don't think CListBox has a method to move a row from one spot to another. If you want to change the order of the items then I'd probably copy them all into a std::vector<std::string>, sort the vector however you want, delete everything from the list box, then copy the vector back in the order you want.
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Yeah. There is no such function in the API too. But I don't know if the list box will flicker if you remove and add the items all at once. Can't you do it by using the
LB_SETITEMDATA message? I think it would be much faster. バルサミコ酢やっぱいらへんで
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Why would he want to use LB_SETITEMDATA ? That will not change the order of the items that appear in the list box.
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I don't know. It was just a hunch. I am too lazy to try it and see. Another straightforward way seems to be the use of LB_INSERTSTRING. Since you can specify the index of the position that you want to insert the string to, I think you can use it to change the order of the items.
バルサミコ酢やっぱいらへんで
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Yes, LB_INSERTSTRING will work if all he wants to do is insert the new item in a specific location.
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Yeah. But won't deleting an item from it's original location and inserting it in it's new location change the order of the items?
バルサミコ酢やっぱいらへんで
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Changing the order of the items is what the OP wants to do.
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This snippet sends the string at zero based index 3, to the position at index 0.
The original order of
cpp Syntax (Toggle Plain Text)
0 1 2 3 4 5 will endup with 3 0 1 2 4 5 バルサミコ酢やっぱいらへんで
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