BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  To all TListView-Experts          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) View previous topic :: View next topic   Author Message Andreas S Guest Posted: Fri Nov 28, 2003 1:05 pm    Post subject: To all TListView-Experts Hello. I need to do some changes in a bigger App, which uses a TListView in vsReport type. I have to perform some actions when I click with my mouse on a specific "cell". Unfortunately, the TListView logic is focused to the items in the first column and there is no special Event like OnSelectCell from TStringGrid. I can of couse do some calculation with the mouse coordinates, but there is one problem: There seems to exist no way to get the position of a TListView's horizontal scroller. I hope there is a tricky way to get this information - please help me. Many thanks in advance, Andreas Back to top JD Guest Posted: Fri Nov 28, 2003 2:01 pm    Post subject: Re: To all TListView-Experts "Andreas S" <nachtvogel (AT) web (DOT) de> wrote: Please wrap your lines when posting. Your editor may visually wrap them but you need to enter a hard return at the end of each line. Quote: [...] I have to perform some actions when I click with my mouse on a specific "cell". [...] I hope there is a tricky way to get this information Use GetHitTestInfoAt() in conjunction with GetItemAt() to get the TListItem that has been clicked. ~ JD Back to top Andreas S Guest Posted: Fri Nov 28, 2003 2:44 pm    Post subject: Re: To all TListView-Experts Quote: Please wrap your lines when posting. Your editor may visually wrap them Indeed ... sorry Quote: Use GetHitTestInfoAt() in conjunction with GetItemAt() to get Thanks, I'll try this. Andreas Back to top Andreas S Guest Posted: Fri Nov 28, 2003 3:09 pm    Post subject: Negative Sorry but GetItemAt() gives me NULL, when clicking beyond the first column and GetHitTestInfoAt provides no exact information ("right client area"). I need the Information in which (logical) column and row I clicked. And I need to know the scrollers position. Any idea? Andreas Back to top Mark Jacobs Guest Posted: Fri Nov 28, 2003 4:50 pm    Post subject: Re: Negative Have you ensured that the "highlight entire row" property (ListView1->RowSelect=true;) of the vsreport style listview has been set to true? If not, you may well get NULL from GetItemAt when clicking beyond the first column. -- Mark Jacobs DK Computing http://www.dkcomputing.co.uk [email]markj (AT) criticalremovethisspuriousantispamstuff (DOT) co.uk[/email] "Andreas S" <nachtvogel (AT) web (DOT) de> wrote Quote: Sorry but GetItemAt() gives me NULL, when clicking beyond the first column and GetHitTestInfoAt provides no exact information ("right client area"). I need the Information in which (logical) column and row I clicked. And I need to know the scrollers position. Any idea? Andreas Back to top Remy Lebeau (TeamB) Guest Posted: Fri Nov 28, 2003 11:04 pm    Post subject: Re: Negative "Andreas S" <nachtvogel (AT) web (DOT) de> wrote Quote: Sorry but GetItemAt() gives me NULL, when clicking beyond the first column GetItemAt() will only work for subcolumns when the RowSelect property is set to true. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Sat Nov 29, 2003 12:04 am    Post subject: Re: To all TListView-Experts "Andreas S" <nachtvogel (AT) web (DOT) de> wrote Quote: I can of couse do some calculation with the mouse coordinates That is what you will have to do. Quote: There seems to exist no way to get the position of a TListView's horizontal scroller. You don't need to know that for what you ask. TListView has a TopItem property that you can use to determine which item is visible at the top of the list. You can then use the TListItem::DisplayRect() method to determine the height of the item (all items will have the same height). With those pieces of information, you can calculate the index of the item where the mouse is. Then to determine the column, you just loop through the Columns collection checking the widths of each column until you find which column the mouse is within. For example: void __fastcall TForm1::ListView1MouseDown(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y) { int Row, Column; MouseToListItem(X, Y, Row, Column); if( (Row != -1) && (Column != -1) ) // do something } void __fastcall TForm1::MouseToListItem(int X, int Y, int &Row, int &Col) { Row = -1; Col = -1; RECT r; TListItem *Item = ListView1->GetItemAt(X, Y); if( Item ) r = Item->DisplayRect(drBounds); else { Item = ListView1->TopItem; if( Item ) { r = Item->DisplayRect(drBounds); if( Y < ((r.bottom - r.top) * (ListView1->VisibleRowCount + 1)) ) { while( !PtInRect(&r, Point(X, Y)) ) { Item = ListView1->GetNextItem(Item, sdBelow, TItemStates()); if( !Item ) break; r = Item->DisplayRect(drBounds); } } } } if( Item ) { Row = Item->Index; for(int x = 0; x < ListView1->Columns->Count; ++x) { r.right = (r.left + ListView1->Column[x]->Width); if( PtInRect(&r, Point(X, Y)) ) { Col = x; break; } r.left += ListView1->Column[x]->Width; } } } Gambit Back to top Damon Chandler (TeamB) Guest Posted: Mon Dec 01, 2003 6:20 am    Post subject: Re: To all TListView-Experts Andreas, Quote: I need to do some changes in a bigger App, which uses a TListView in vsReport type. I have to perform some actions when I click with my mouse on a specific "cell". You can use the LVM_SUBITEMHITTEST message to determine which "cell" was clicked... http://tinyurl.com/x65b The message is documented here: http://tinyurl.com/x65f. 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