When the TreeList.SelectImageList or TreeList.StateImageList properties are assigned, each TreeListNode has an indent to draw these images, even if the TreeListNode.SelectImageIndex or TreeListNode.StateImageIndex properties are set to -1.
In a situation when this behavior is undesirable, it's possible to create a custom TreeList descendant, and change it by overriding the TreeListViewInfo.GetDataBoundsLocation method.
Question Comments
Added By: Daniel Parsons at: 7/7/2015 12:06:05 PM
Corrected code as follows:
protected override void CalcStateImage(RowInfo ri)
{
base.CalcStateImage(ri);
if (Size.Empty != RC.StateImageSize && -1 == ri.Node.StateImageIndex)
ri.StateImageLocation.X -= RC.StateImageSize.Width;
}
I missed Daniel's comment and spent a few hours before coming to the same conclusion... Added By: Nadezhda (DevExpress Support) at: 11/7/2017 6:45:17 AM
Hello Jacobo,
We will update this example as soon as possible. We appreciate your patience.
there has a bug, if override the CalcStateImageBounds function, the treelist's GetStateImage event will not be eraising!
Added By: waresofter at: 12/21/2017 3:06:03 AM
[C#]usingDevExpress.XtraEditors;usingDevExpress.XtraTreeList;usingDevExpress.XtraTreeList.Nodes;usingDevExpress.XtraTreeList.ViewInfo;usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;namespaceDevSample{publicpartialclassFrmTreeList:XtraForm{publicFrmTreeList(){InitializeComponent();this.treeList1.FocusedNodeChanged+=TreeList1_FocusedNodeChanged;List<Record>records=newList<Record>(newRecord[]{newRecord(1,"test1","i can raising focusNodeChanged event"),newRecord(2,"test2","i can raising focusNodeChanged event")});this.treeList1.DataSource=records;}privatevoidTreeList1_FocusedNodeChanged(objectsender,DevExpress.XtraTreeList.FocusedNodeChangedEventArgse){Recordrec=this.treeList1.GetDataRecordByNode(e.Node)asRecord;System.Diagnostics.Debug.WriteLine(rec.Name);}classRecord{publicintIndex{get;set;}publicstringName{get;set;}publicstringDescription{get;set;}publicRecord(){}publicRecord(intidx,stringname,stringdesc){this.Index=idx;this.Name=name;this.Description=desc;}}privatevoidbuttonEdit1_ButtonClick(objectsender,DevExpress.XtraEditors.Controls.ButtonPressedEventArgse){if(e.Button.Caption=="添加记录"){TreeListNodetln=this.treeList1.AppendNode(newobject[]{"a4","b4","c4"},-1);treeList1.FocusedNode=tln;treeList1.OptionsBehavior.Editable=true;treeList1.ShowEditor();}}privatevoidtreeList1_GetStateImage(objectsender,DevExpress.XtraTreeList.GetStateImageEventArgse){System.Diagnostics.Debug.WriteLine("treeList1_GetStateImage");Recordrec=this.treeList1.GetDataRecordByNode(e.Node)asRecord;e.NodeImageIndex=rec.Index% 2 == 0 ?-1 : 0;}}publicclassMyTreeList:TreeList{/******************************************************** * 当节点前没有图片时，去除图片占位符 * https://www.devexpress.com/Support/Center/Example/Details/E2153/how-to-get-rid-of-the-space-reserved-for-images-in-the-treelistnode-when-a-certain * * ******************************************************/publicMyTreeList():base(){}protectedoverrideTreeListViewInfoCreateViewInfo(){returnnewMyTreeListViewInfo(this);}// 当某个节点前没有图标时，不显示图标的占位空间publicclassMyTreeListViewInfo:TreeListViewInfo{publicMyTreeListViewInfo(TreeListtreeList):base(treeList){}protectedoverridevoidCalcSelectImageBounds(RowInforInfo,RectangleindentBounds){System.Diagnostics.Debug.WriteLine("CalcSelectImageBounds: "+rInfo.Node.SelectImageIndex);if(Size.Empty!=RC.SelectImageSize&&-1 ==rInfo.Node.SelectImageIndex)return;base.CalcSelectImageBounds(rInfo,indentBounds);}protectedoverridevoidCalcStateImageBounds(RowInforInfo,RectangleindentBounds){System.Diagnostics.Debug.WriteLine("CalcStateImageBounds: "+rInfo.Node.StateImageIndex);if(Size.Empty!=RC.StateImageSize&&-1 ==rInfo.Node.StateImageIndex)return;base.CalcStateImageBounds(rInfo,indentBounds);}}}}
Added By: Nadezhda (DevExpress Support) at: 12/21/2017 7:42:13 AM Hello,
I have created a separate ticket on your behalf: The GetStateImage event does not fire when the CalcStateImageBounds method is overrided. It has been placed in our processing queue and will be answered shortly.
