Re: [Lazarus] TListView - how to make selected line stay selected?
On Tue, 20 Aug 2019 00:01:38 +0200, Werner Pamler via lazarus wrote: >Did you set HideSelection to false? Did not know it existed... Set to true by default. But when I unchecked it and tried to skip the code I showed it did not work. When I returned to the listview the selected item was unselected immediately... So I have to keep my changes. -- Bo Berglund Developer in Sweden -- ___ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
Re: [Lazarus] TListView - how to make selected line stay selected?
Did you set HideSelection to false? -- ___ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
Re: [Lazarus] TListView - how to make selected line stay selected?
On Mon, 19 Aug 2019 18:21:06 +0200, Bo Berglund via lazarus wrote: >How can this be accomplished? I ended up adding the code below after reading this: http://delphidabbler.com/articles?article=16 procedure TfrmEditCuts.lvCutListCustomDrawItem(Sender: TCustomListView; Item: TListItem; State: TCustomDrawState; var DefaultDraw: Boolean); const cStripe = $FF9933; // colour of selected list items begin if Item.Index = lvCutList.ItemIndex then begin lvCutList.Canvas.Brush.Color := cStripe; lvCutList.Canvas.Font.Color := clWhite; end else lvCutList.Canvas.Brush.Color := clWindow; end; This made the selected row stay colored even though the listview lost focus when I clicked the buttons. I had to probe the selection color in my paint program to set the cStripe value to the same because when clicking on an item the CustomDrawItem event seems not to be called. So on initial click the row was colored blue and when I used my buttons to move the row it was colored in the cStripe value that I originally used (light green). Changing the cStripe value to the color of initial selection made the row move without visible color change -- Bo Berglund Developer in Sweden -- ___ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
[Lazarus] TListView - how to make selected line stay selected?
I have a dialog which is used to enable changing the order of certain items. The items are displayed in a TListView component in report mode, each item occupies one line and shows several properties in the columns. Now I want to be able to select the row (list.Rowselect = true) when clicking on it. This works OK. Then I have a button which moves the item up and another button to move it down the list. In my code I do the following for moving up (lvCutList is the listview showing the data, FVideoCuts ia a dynamic array of TVideoCut records): procedure TfrmEditCuts.btnUpClick(Sender: TObject); var i, l: integer; V1: TVideoCut; begin i := lvCutList.ItemIndex; if i < 1 then exit; //Not selected or already at top V1 := FVideoCuts[i-1]; FVideoCuts[i-1] := FVideoCuts[i]; FVideoCuts[i] := V1; ShowCuts(FVideoCuts); // <= Repopulate the listview from data lvCutList.ItemIndex := i-1; //<= This is no longer visible end; So the end result is that the line is moved up one position in the list and I set the itemindex property such that the moved line is still selected. But it does not show on screen... The selection of the line disappeares immediately when the button is clicked and only returns if I forcibly click in the listview in some place that will not move the selection, for example in the unpopulated area at the bottom. What I would like to see is that the selection color *stays visible* even if focus is moved away from the listview component. How can this be accomplished? I am pretty sure I could do this when I used Delphi a few years back at work (now retired)... -- Bo Berglund Developer in Sweden -- ___ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
