Windows Controls pot

Week 3
Windows Controls
Contents

MenuStrip and ContextMenuStrip control (p.147)

TreeView (p.110)

Advanced topics (p.521)
Slide 2
Create MenuStrip at run-time

Add a menu to MenuStrip control at run-time

MenuStrip.Items.Add method

Example:
MenuStrip.Items.Add("File");
MenuStrip.Items.Add("View");

Add a menu item to other menu item at run-time

ToolStripMenuItem.DropDownItems.Add method

Example:
ToolStripItem mnuOpen;
mnuOpen = fileToolStripMenuItem.DropDownItems.Add("Open");
mnuOpen.Click += new EventHandler(mnuOpen_Click);
Slide 3
ContextMenuStrip control (p.173)


ContextMenuStrip similar to the MenuStrip control

The main difference between the ContextMenuStrip
and the MenuStrip

ContextMenuStrip control does not have a top-level
menu

Not visible at run time unless invoked by right-clicking
the control that it is associated with
Slide 4
ContextMenuStrip control (cont.)

Associating a ContextMenuStrip property with a
control

Using ContextMenuStrip property of a control or

Write in Mouse_Up event handler

ContextMenuStrip1.Show(Control, X, Y)

Demo:

Module 4 – Exercise 3 (modified)
Slide 5
TreeView control (p.110)

The TreeView control
allows you to display a

list of objects in a
hierarchical manner

Node

Root

Parent Node

Child Node

Level of nodes

TreeNode object
Slide 11
TreeView properties

Nodes: gets the collection of child nodes belong to
TreeView

FullRowSelect: True/False

HideSelection: True/False

ImageList

LabelEdit: True/False

ShowLines: True/False


SelectedNode: get or set the selected node
Slide 12
TreeNode properties

Text

ImageIndex

SelectedImageIndex

IsSelected

Level

Parent

Nodes: gets the collection of child nodes belong to a
TreeNode
Slide 16
TreeNode methods
Methods Description
Expand() Expands a node
Collapse() Collapses a node
ExpandAll() Expands all the children of a node
CollapseAll() Collapses all the children of a node
GetNodeCount() Return the number of child node
Slide 17
Methods, properties of TreeView,
TreeNode


Some important methods, properties of the TreeView,
TreeNode:

.Nodes.Add( string text )

.Nodes.Add( TreeNode node )

.Nodes.Remove( TreeNode node )

.Nodes.RemoveAt( int index )

.Nodes.Clear()

.Nodes.Count

.Nodes[int index]: returns a TreeNode object
Slide 18
Default event of TreeView

AfterSelect event: occurs when the selection has
been changed
private void treeview1_AfterSelect(…)
{
if (treeview1.SelectedNode != null)
{
// process selected node
}
}
Slide 19
Operations on TreeView control


Add node

Delete selected node

Display selected node

Visit nodes

Search and select node

Expanding and collapsing nodes

Level of TreeNode

Using Tag property of TreeNode
Slide 20
Add node

To add root node to TreeView:

TreeView1.Nodes.Add(…)

To add a node to the root node:

TreeView1.Nodes[0].Nodes.Add(…)

To add a node to the second child node of root node:

TreeView1.Nodes[0].Nodes[1].Nodes.Add(…)


Rule to add node:
1. Get the parent node
2. Add a node to that parent node
Slide 21
Add node (cont.)

Example 1: Add a node to selected node

Example 2: Create tree
TreeNode root;
root = treeView1.Nodes.Add("Công ty IBM");
root.Nodes.Add("Phòng tiếp thị");
root.Nodes[0].Nodes.Add("Lam Trường");
TreeNode parent = TreeView1.SelectedNode;
parent.Nodes.Add(TextBox1.Text);
Slide 22
Delete selected node
private void DeleteSelectedNode(TreeView tree)
{
if (tree.SelectedNode != null)
tree.Nodes.Remove(tree.SelectedNode);
}
Slide 23
Display selected node
private void treeview1_AfterSelect(…)
{
if (treeview1.SelectedNode != null)
{
TextBox1.Text = treeview1.SelectedNode.Text;

//
}
}
Slide 24
Visit direct children of the node

Visitting direct children of selected node, by:

You can visit direct children of any node
foreach (TreeNode node in tree.SelectedNode.Nodes)
{
// process node
}
Slide 25
Search and select node

Set HideSelection property is false

Loop all node using node visiting

Note EnsureVisible property for selected TreeNode
foreach (TreeNode node in SearchNode.Nodes)
{
if (match)
{
treeView1.SelectedNode = node;
}
}
Slide 26
Expanding and collapsing nodes


Expand and collapse methods of node

Use Expand or Collapse method of TreeView,
TreeNode

Expand all node

Using recursion

Treeview1.ExpandAll();

Example

Write program to expand - collapse all node in Module
5 exercise 1
Slide 27
Level of TreeNode

Use Level property to process the node you want
Slide 28
Using Tag property of TreeNode

Using Tag property to store information you want

Set Tag property for each TreeNode
Slide 29
Advanced topics in Windows Forms

MDI application (p.553)


The NotifyIcon component (p.123)

Drag-Drop (p.533)

Self-study

Using user assistance controls and components (p.573-
p.590)

Implementing Globalization and Localization for a
Windows Forms application (p.543)

Deploying applications with ClickOnce (p.669)

Creating setup projects for deployment (p.676)
Slide 32
MDI application (p.553)

Multiple Document Interface (MDI) Windows
Single Document Interface (SDI) Multiple Document Interface (MDI)
IsMdiContainer = False
IsMdiContainer = True
Slide 33
Redisplaying child windows
Find form
If existing
ActivateShow
If not existing
private void HienForm( Form f )

{
bool thay = false;
foreach (Form frm in this.MdiChildren)
{
if (frm.Name.ToUpper().Equals(f.Name.ToUpper()))
{
frm.Activate();
thay = true;
}
}
if (thay == false)
{
f.MdiParent = this;
f.Show();
}
}
Slide 34
private void menu_Click(…)
{
frmSV frm = new frmSV();
HienForm(frm);
}
The NotifyIcon component
(p.123)

The NotifyIcon component is a component that
represents an icon that appears in the system tray

usually used with applications that run in the
background


can provide information about the program execution
(Text property)

can be associated with a context menu
(ContextMenuStrip property)
Slide 35