?
Solved

Listview Drag Into Group

Posted on 2009-05-14
1
Medium Priority
?
669 Views
Last Modified: 2012-05-07
Hi, I'd liketo me able to Drag a listview item into a listview Group

for example I have 2 groups, I grad 1 item into the second group

this is what I'm using for dragging.

procedure TFrame2.ListView1DragDrop(Sender, Source: TObject; X, Y: Integer);
var
  currentItem, nextItem, dragItem, dropItem : TListItem;
begin
  if Sender = Source then
  begin
    with TListView(Sender) do
    begin
      dropItem := GetItemAt(X, Y) ;
      currentItem := Selected;
      while currentItem <> nil do
      begin
        nextItem := GetNextItem(currentItem, SdAll, [IsSelected]) ;
        if Assigned(dropItem) then
          dragItem := Items.Insert(dropItem.Index)
        else
          dragItem := Items.Add;
        dragItem.Assign(currentItem) ;
        currentItem.Free;
        currentItem := nextItem;
      end;
    end;
  end;

end;

procedure TFrame2.ListView1DragOver(Sender, Source: TObject; X, Y: Integer;
  State: TDragState; var Accept: Boolean);
begin
  Accept := Sender = ListView1;
end;





and from what I can tell this is for changing the item to a different group. the below will move the selected item into the second group.

listview1.Items.Item[listview1.Selected.Index].GroupID:=1;



I'm needing that to be merged within the drag.


there is also this function

function MoveListViewItem(ListView: TListView; ItemFrom, ItemTo: Word): Boolean;
var
  Source, Target: TListItem;
begin
  listview.Items.BeginUpdate;
  try
    Source := ListView.Items[ItemFrom];
    Target := ListView.Items.Insert(ItemTo);
    Target.Assign(Source);
    Target.Selected := True;
    Source.Free;
    Result := True;
  finally
    ListView.Items.EndUpdate;
  end;
end;
 
//Move Down
 if ListView1.Selected <> nil then
  MoveListViewItem(ListView1, ListViewIP1.Selected.Index, ListView1.Selected.Index + 2);
 
//Move Up
 if ListView1.Selected <> nil then
  MoveListViewItem(ListView1, ListView1.Selected.Index, ListView1.Selected.Index -1);


0
Comment
Question by:eNarc
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 26

Accepted Solution

by:
EddieShipman earned 2000 total points
ID: 24396565
Can't you just check the GroupID of dropItem and then set the GroupID of dragItem to the same?
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…
Suggested Courses
Course of the Month10 days, 12 hours left to enroll

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question