VB Controls, TreeView - Unable to scroll up when DragOver occurs

TreeView - Unable to scroll up when DragOver occurs

Author	Message
Bill Woo #1 / 3	TreeView - Unable to scroll up when DragOver occurs I have a treeview that has code in the DragOver and DragDrop events. The DragDrop event accepts a new node into the treeview when the source has been a node from another treeview. The DragOver event code changes the SelectedItem to the node that is located via the HitTest(x,y) method, it also expands the node so the user can navigate (and select) sub nodes. The problem is that the DragOver event enables the user to expand the entire tree by moving the dragged item over every node. As the mouse moves down the treeview will scroll down as appropriate to the very last node. When the user goes to scroll back up the treeview - it won't move. You are stuck at the topmost visible node. How can I get the entire treeview to scroll back up to the very top of the tree during the DragOver event? Thanks Bill Wood
Sat, 20 Nov 2004 10:09:51 GMT

Bill Woo #2 / 3	TreeView - Unable to scroll up when DragOver occurs I solved the problem by applying the "EnsureVisible" method to the previous node and if there is no previous node the parent node - but if there is a better way please let me know. Quote: > I have a treeview that has code in the DragOver and DragDrop events. > The DragDrop event accepts a new node into the treeview when the source has > been a node from another treeview. > The DragOver event code changes the SelectedItem to the node that is located > via the HitTest(x,y) method, it also expands the node so the user can > navigate (and select) sub nodes. > The problem is that the DragOver event enables the user to expand the entire > tree by moving the dragged item over every node. As the mouse moves down the > treeview will scroll down as appropriate to the very last node. When the > user goes to scroll back up the treeview - it won't move. You are stuck at > the topmost visible node. > How can I get the entire treeview to scroll back up to the very top of the > tree during the DragOver event? > Thanks > Bill Wood
Sat, 20 Nov 2004 11:52:00 GMT

Graem #3 / 3	TreeView - Unable to scroll up when DragOver occurs I have a wrapper class that does exactly what you want plus includes an Auto-Expand of parent nodes when Drag pauses over a node. Goto:- <http://www.planetsourcecode.com/vb/scripts/ShowCode.asp?txtCodeId=344...> Hope this helps! Graeme Quote: >I have a treeview that has code in the DragOver and DragDrop events. >The DragDrop event accepts a new node into the treeview when the source has >been a node from another treeview. >The DragOver event code changes the SelectedItem to the node that is located >via the HitTest(x,y) method, it also expands the node so the user can >navigate (and select) sub nodes. >The problem is that the DragOver event enables the user to expand the entire >tree by moving the dragged item over every node. As the mouse moves down the >treeview will scroll down as appropriate to the very last node. When the >user goes to scroll back up the treeview - it won't move. You are stuck at >the topmost visible node. >How can I get the entire treeview to scroll back up to the very top of the >tree during the DragOver event? >Thanks >Bill Wood
Sat, 20 Nov 2004 14:07:26 GMT

Page 1 of 1

[ 3 post ]