VirtualStringTree as table - CheckBox in columns

[Stano 140]

There is no problem at column 0. I'm addressing the other ones.

I found this on the internet. I don't understand the code, but it works. There is one problem. It is ugly at the moment. Is there a solution where it will be prettier?
I just need to display it! I don't like the use of the image.

A1. Draw a CheckBox and start drawing in OnAfterCellPaint. Here you can see the styles in Winapi.Windows, not only the CheckBox, but also the RadioButton.

uses Winapi.Windows;

procedure TfrmFilterCust.vstAfterCellPaint(Sender: TBaseVirtualTree;
  TargetCanvas: TCanvas; Node: PVirtualNode; Column: TColumnIndex;
  CellRect: TRect);
var
  vANode: PCustNode;
begin
  if Column = 3 then
  begin
    vANode := Sender.GetNodeData(Node);
    if vANode.IsCustomer then
      DrawFrameControl(TargetCanvas.Handle, CellRect, DFC_BUTTON, DFCS_CHECKED)
    else
      DrawFrameControl(TargetCanvas.Handle, CellRect, DFC_BUTTON, DFCS_BUTTONCHECK);
  end
  else if Column = 4 then
  begin
    vANode := Sender.GetNodeData(Node);
    if vANode.IsSupplier then
      DrawFrameControl(TargetCanvas.Handle, CellRect, DFC_BUTTON, DFCS_CHECKED)
    else
      DrawFrameControl(TargetCanvas.Handle, CellRect, DFC_BUTTON, DFCS_BUTTONCHECK);
  end;
end;

A2. Click on CheckBox to select the Node using the OnMouseDown mouse.

procedure TfrmFilterCust.vstMouseDown(Sender: TObject; Button: TMouseButton;

procedure TfrmFilterCust.vstMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  FSeledNode := vst.GetNodeAt(X, Y);
end;

Edit the material properties in the OnColumnClick event and redraw the RepaintNode in the call.

procedure TfrmFilterCust.vstColumnClick(Sender: TBaseVirtualTree; Column: TColumnIndex; Shift: TShiftState);
var
  vANode: PCustNode;
begin
  if Column = 3 then
  begin
    vANode := Sender.GetNodeData(FSeledNode);
    vANode.IsCustomer := not vANode.IsCustomer;
    Sender.RepaintNode(FSeledNode);
  end
  else if Column = 4 then
  begin
    vANode := Sender.GetNodeData(FSeledNode);
    vANode.IsSupplier := not vANode.IsSupplier;
    Sender.RepaintNode(FSeledNode);
  end;
end;

This completes the display and editing of the CheckBox in the column.
B. Check box in the header
Edit header \ Columns \ Column[n] \ Set properties in properties:

• CheckBox = True , Show CheckBox.
• CheckType = ctCheckBox, typ je CheckBox a RadioButton
• CheckState = csUncheckedNormal  //csCheckedNormal to see if there is a check

In the properties, edit the header\Options check itShowImages in the properties edit TreeOptions\MiscOptions check to checkSupport
 

[dwrbudr 8]

Inspect VirtualTrees.pas code and especially 

procedure TBaseVirtualTree.PaintCheckImage

 

[Stano 140]

I'll look into it. I don't want to use images. Maybe the feature in question is about something else. I'll see.