internal void CollapseBelow (TreeNode node, int count_to_next)
{
if (update_stack > 0) {
update_needed = true;
return;
}
Rectangle below = new Rectangle (0, node.Bounds.Bottom, ViewportRectangle.Width,
ViewportRectangle.Height - node.Bounds.Bottom);
int amount = count_to_next * ActualItemHeight;
if (amount > 0)
XplatUI.ScrollWindow (Handle, below, 0, -amount, false);
if (show_plus_minus) {
Invalidate (new Rectangle (0, node.GetY (), Width, ActualItemHeight));
}
}
private void DrawTreeNode (TreeNode node, Graphics dc, Rectangle clip)
{
int child_count = node.nodes.Count;
int y = node.GetY ();
int middle = y + (ActualItemHeight / 2);
if (full_row_select && !show_lines) {
Rectangle r = new Rectangle (1, y, ViewportRectangle.Width - 2, ActualItemHeight);
DrawSelectionAndFocus (node, dc, r);
}
if (draw_mode == TreeViewDrawMode.Normal || draw_mode == TreeViewDrawMode.OwnerDrawText) {
if ((show_root_lines || node.Parent != null) && show_plus_minus && child_count > 0)
ThemeEngine.Current.TreeViewDrawNodePlusMinus (this, node, dc, node.GetLinesX () - Indent + 5, middle);
if (checkboxes && state_image_list == null)
DrawNodeCheckBox (node, dc, CheckBoxLeft (node) - 3, middle);
if (checkboxes && state_image_list != null)
DrawNodeState (node, dc, CheckBoxLeft (node) - 3, y);
if (!checkboxes && node.StateImage != null)
dc.DrawImage (node.StateImage, new Rectangle (CheckBoxLeft (node) - 3, y, 16, 16));
if (show_lines)
DrawNodeLines (node, dc, clip, dash, node.GetLinesX (), y, middle);
if (ImageList != null)
DrawNodeImage (node, dc, clip, node.GetImageX (), y);
}
if (draw_mode != TreeViewDrawMode.Normal) {
dc.FillRectangle (Brushes.White, node.Bounds);
TreeNodeStates tree_node_state = TreeNodeStates.Default;;
if (node.IsSelected)
tree_node_state = TreeNodeStates.Selected;
if (node.Checked)
tree_node_state |= TreeNodeStates.Checked;
if (node == focused_node)
tree_node_state |= TreeNodeStates.Focused;
Rectangle node_bounds = node.Bounds;
if (draw_mode == TreeViewDrawMode.OwnerDrawText) {
node_bounds.X += 3;
node_bounds.Y += 1;
} else {
node_bounds.X = 0;
node_bounds.Width = Width;
}
DrawTreeNodeEventArgs e = new DrawTreeNodeEventArgs (dc, node, node_bounds, tree_node_state);
OnDrawNode (e);
if (!e.DrawDefault)
return;
}
if (!node.IsEditing)
DrawStaticNode (node, dc);
}
internal void ExpandBelow (TreeNode node, int count_to_next)
{
if (update_stack > 0) {
update_needed = true;
return;
}
// If node Bottom is less than 0, the node is above and not visible,
// and we need to scroll the entire viewport
int node_bottom = node.Bounds.Bottom >= 0 ? node.Bounds.Bottom : 0;
Rectangle below = new Rectangle (0, node_bottom, ViewportRectangle.Width,
ViewportRectangle.Height - node_bottom);
int amount = count_to_next * ActualItemHeight;
if (amount > 0)
XplatUI.ScrollWindow (Handle, below, 0, amount, false);
if (show_plus_minus) {
Invalidate (new Rectangle (0, node.GetY (), Width, ActualItemHeight));
}
}
public override void TreeViewDrawNodePlusMinus (TreeView treeView, TreeNode node, Graphics dc, int x, int middle)
{
int height = treeView.ActualItemHeight - 2;
dc.FillRectangle (ResPool.GetSolidBrush (treeView.BackColor), (x + 4) - (height / 2), node.GetY() + 1, height, height);
dc.DrawRectangle (SystemPens.ControlDarkDark, x, middle - 4, 8, 8);
if (node.IsExpanded) {
dc.DrawLine (SystemPens.ControlDarkDark, x + 2, middle, x + 6, middle);
} else {
dc.DrawLine (SystemPens.ControlDarkDark, x + 2, middle, x + 6, middle);
dc.DrawLine (SystemPens.ControlDarkDark, x + 4, middle - 2, x + 4, middle + 2);
}
}
