static TreeItem PreviousItem(Tree tree, TreeItem item) {
if (item == null) return null;
TreeItem childItem = item;
TreeItem parentItem = childItem.getParentItem();
int index = parentItem == null ? tree.indexOf(childItem) : parentItem.indexOf(childItem);
if (index == 0) {
return parentItem;
} else {
TreeItem nextItem =
parentItem == null ? tree.getItem(index - 1) : parentItem.getItem(index - 1);
int count = nextItem.getItemCount();
while (count > 0 && nextItem.getExpanded()) {
nextItem = nextItem.getItem(count - 1);
count = nextItem.getItemCount();
}
return nextItem;
}
}
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new GridLayout());
final Tree tree1 = new Tree(shell, SWT.NONE);
new TreeColumn(tree1, SWT.NONE).setWidth(40);
final TreeItem treeItem1 = new TreeItem(tree1, SWT.NONE);
treeItem1.setText("A");
final TreeItem treeItem12 = new TreeItem(tree1, SWT.NONE);
treeItem12.setText("W");
final Tree tree2 = new Tree(shell, SWT.BORDER);
new TreeColumn(tree2, SWT.NONE).setWidth(40);
final TreeItem treeItem2 = new TreeItem(tree2, SWT.NONE);
treeItem2.setText("A");
final TreeItem treeItem22 = new TreeItem(tree2, SWT.NONE);
treeItem22.setText(".");
final Tree tree3 = new Tree(shell, SWT.V_SCROLL);
new TreeColumn(tree3, SWT.NONE).setWidth(40);
final TreeItem treeItem3 = new TreeItem(tree3, SWT.NONE);
treeItem3.setText("A");
final TreeItem treeItem32 = new TreeItem(tree3, SWT.NONE);
treeItem32.setText("ABC");
final Tree tree4 = new Tree(shell, SWT.H_SCROLL);
new TreeColumn(tree4, SWT.NONE).setWidth(40);
final TreeItem treeItem4 = new TreeItem(tree4, SWT.NONE);
treeItem4.setText(".");
final TreeItem treeItem42 = new TreeItem(tree4, SWT.NONE);
treeItem42.setText("A.");
final Tree tree5 = new Tree(shell, SWT.V_SCROLL | SWT.H_SCROLL);
new TreeColumn(tree5, SWT.NONE).setWidth(40);
final TreeItem treeItem5 = new TreeItem(tree5, SWT.NONE);
treeItem5.setText("W");
final TreeItem treeItem52 = new TreeItem(tree5, SWT.NONE);
treeItem52.setText("Width");
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
// Display display = new Display ();
// Shell shell = new Shell (display);
// shell.setLayout(new FillLayout());
// Image imageOpen = new Image(display, TestButton.class.getResourceAsStream("openFolder.gif"));
// Image imageClose = new Image(display,
// TestButton.class.getResourceAsStream("closedFolder.gif"));
// final Tree tree = new Tree (shell, SWT.BORDER | SWT.CHECK);
// tree.setSize (100, 100);
// shell.setSize (300, 200);
// for (int i=0; i<2; i++) {
// TreeItem iItem = new TreeItem (tree, 0);
// iItem.setText ("TreeItem (0) -" + i);
// iItem.setImage(imageOpen);
// for (int j=0; j<2; j++) {
// TreeItem jItem = new TreeItem (iItem, 0);
// jItem.setText ("TreeItem (1) -" + j);
// jItem.setImage(imageClose);
// for (int k=0; k<3; k++) {
// TreeItem kItem = new TreeItem (jItem, 0);
// kItem.setText ("TreeItem (2) -" + k);
//// for (int l=0; l<2; l++) {
//// TreeItem lItem = new TreeItem (kItem, 0);
//// lItem.setText ("TreeItem (3) -" + l);
//// }
// }
// }
// }
// shell.open ();
// while (!shell.isDisposed()) {
// if (!display.readAndDispatch ()) display.sleep ();
// }
// imageOpen.dispose();
// imageClose.dispose();
// display.dispose ();
}
public static void main(String[] args) {
final Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Tree tree = new Tree(shell, SWT.FULL_SELECTION | SWT.BORDER);
tree.setHeaderVisible(true);
TreeColumn column0 = new TreeColumn(tree, SWT.LEFT);
column0.setText("Column 0");
TreeColumn column1 = new TreeColumn(tree, SWT.LEFT);
column1.setText("Column 1");
TreeColumn column2 = new TreeColumn(tree, SWT.LEFT);
column2.setText("Column 2");
for (int i = 0; i < 9; i++) {
TreeItem item = new TreeItem(tree, SWT.NONE);
item.setText("item " + i);
item.setText(1, "column 1 - " + i);
item.setText(2, "column 2 - " + i);
for (int j = 0; j < 9; j++) {
TreeItem subItem = new TreeItem(item, SWT.NONE);
subItem.setText("item " + i + " " + j);
subItem.setText(1, "column 1 - " + i + " " + j);
subItem.setText(2, "column 2 - " + i + " " + j);
for (int k = 0; k < 9; k++) {
TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
subsubItem.setText("item " + i + " " + j + " " + k);
subsubItem.setText(1, "column 1 - " + i + " " + j + " " + k);
subsubItem.setText(2, "column 2 - " + i + " " + j + " " + k);
}
}
}
column0.pack();
column1.pack();
column2.pack();
Heartbeat =
new Runnable() {
@Override
public void run() {
if (!Tracking || tree.isDisposed()) return;
Point cursor = display.getCursorLocation();
cursor = display.map(null, tree, cursor);
Scroll(tree, cursor.x, cursor.y);
display.timerExec(ScrollSpeed, Heartbeat);
}
};
Listener listener =
new Listener() {
@Override
public void handleEvent(Event event) {
switch (event.type) {
case SWT.MouseEnter:
Tracking = true;
display.timerExec(0, Heartbeat);
break;
case SWT.MouseExit:
Tracking = false;
break;
}
}
};
tree.addListener(SWT.MouseEnter, listener);
tree.addListener(SWT.MouseExit, listener);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
static TreeItem NextItem(Tree tree, TreeItem item) {
if (item == null) return null;
if (item.getExpanded()) {
return item.getItem(0);
} else {
TreeItem childItem = item;
TreeItem parentItem = childItem.getParentItem();
int index = parentItem == null ? tree.indexOf(childItem) : parentItem.indexOf(childItem);
int count = parentItem == null ? tree.getItemCount() : parentItem.getItemCount();
while (true) {
if (index + 1 < count) {
return parentItem == null ? tree.getItem(index + 1) : parentItem.getItem(index + 1);
} else {
if (parentItem == null) {
return null;
} else {
childItem = parentItem;
parentItem = childItem.getParentItem();
index = parentItem == null ? tree.indexOf(childItem) : parentItem.indexOf(childItem);
count = parentItem == null ? tree.getItemCount() : parentItem.getItemCount();
}
}
}
}
}
