dlangui.widgets.tree

TreeWidgetBase - abstract tree widget

TreeWidget - Tree widget with items which can have icons and labels

Synopsis:

import dlangui.widgets.tree;

// tree view example
TreeWidget tree = new TreeWidget("TREE1");
tree.layoutWidth(WRAP_CONTENT).layoutHeight(FILL_PARENT);
TreeItem tree1 = tree.items.newChild("group1", "Group 1"d, "document-open");
tree1.newChild("g1_1", "Group 1 item 1"d);
tree1.newChild("g1_2", "Group 1 item 2"d);
tree1.newChild("g1_3", "Group 1 item 3"d);
TreeItem tree2 = tree.items.newChild("group2", "Group 2"d, "document-save");
tree2.newChild("g2_1", "Group 2 item 1"d, "edit-copy");
tree2.newChild("g2_2", "Group 2 item 2"d, "edit-cut");
tree2.newChild("g2_3", "Group 2 item 3"d, "edit-paste");
tree2.newChild("g2_4", "Group 2 item 4"d);
TreeItem tree3 = tree.items.newChild("group3", "Group 3"d);
tree3.newChild("g3_1", "Group 3 item 1"d);
tree3.newChild("g3_2", "Group 3 item 2"d);
TreeItem tree32 = tree3.newChild("g3_3", "Group 3 item 3"d);
tree3.newChild("g3_4", "Group 3 item 4"d);
tree32.newChild("group3_2_1", "Group 3 item 2 subitem 1"d);
tree32.newChild("group3_2_2", "Group 3 item 2 subitem 2"d);
tree32.newChild("group3_2_3", "Group 3 item 2 subitem 3"d);
tree32.newChild("group3_2_4", "Group 3 item 2 subitem 4"d);
tree32.newChild("group3_2_5", "Group 3 item 2 subitem 5"d);
tree3.newChild("g3_5", "Group 3 item 5"d);
tree3.newChild("g3_6", "Group 3 item 6"d);

LinearLayout treeLayout = new HorizontalLayout("TREE");
LinearLayout treeControlledPanel = new VerticalLayout();
treeLayout.layoutWidth = FILL_PARENT;
treeControlledPanel.layoutWidth = FILL_PARENT;
treeControlledPanel.layoutHeight = FILL_PARENT;
TextWidget treeItemLabel = new TextWidget("TREE_ITEM_DESC");
treeItemLabel.layoutWidth = FILL_PARENT;
treeItemLabel.layoutHeight = FILL_PARENT;
treeItemLabel.alignment = Align.Center;
treeItemLabel.text = "Sample text"d;
treeControlledPanel.addChild(treeItemLabel);
treeLayout.addChild(tree);
treeLayout.addChild(new ResizerWidget());
treeLayout.addChild(treeControlledPanel);

tree.selectionListener = delegate(TreeItems source, TreeItem selectedItem, bool activated) {
    dstring label = "Selected item: "d ~ toUTF32(selectedItem.id) ~ (activated ? " selected + activated"d : " selected"d);
    treeItemLabel.text = label;
};

tree.items.selectItem(tree.items.child(0));