Bitmap Viewer Host
/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald
Publisher: Apress
ISBN: 1590590457
*/
using System.Drawing;
using System.Windows.Forms;
using System.IO;
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace BitmapViewerHost
{
/// <summary>
/// Summary description for BitmapViewerHost.
/// </summary>
public class BitmapViewerHost : System.Windows.Forms.Form
{
private BitmapViewer bitmapViewer1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public BitmapViewerHost()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.bitmapViewer1 = new BitmapViewer();
this.SuspendLayout();
//
// bitmapViewer1
//
this.bitmapViewer1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right);
this.bitmapViewer1.Dimension = 80;
this.bitmapViewer1.Directory = null;
this.bitmapViewer1.DockPadding.All = 1;
this.bitmapViewer1.Location = new System.Drawing.Point(12, 12);
this.bitmapViewer1.Name = "bitmapViewer1";
this.bitmapViewer1.Size = new System.Drawing.Size(300, 244);
this.bitmapViewer1.Spacing = 10;
this.bitmapViewer1.TabIndex = 0;
this.bitmapViewer1.PictureSelected += new BitmapViewer.PictureSelectedDelegate(this.bitmapViewer1_PictureSelected);
//
// BitmapViewerHost
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(320, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.bitmapViewer1});
this.Name = "BitmapViewerHost";
this.Text = "BitmapViewerHost";
this.Load += new System.EventHandler(this.BitmapViewerHost_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new BitmapViewerHost());
}
private void BitmapViewerHost_Load(object sender, System.EventArgs e)
{
bitmapViewer1.Directory = Application.StartupPath;
bitmapViewer1.Directory = "c:\\windows";
}
private void bitmapViewer1_PictureSelected(object sender, PictureSelectedEventArgs e)
{
MessageBox.Show("You chose " + e.FileName);
}
}
/// <summary>
/// Summary description for BitmapViewer.
/// </summary>
public class BitmapViewer : System.Windows.Forms.UserControl
{
internal System.Windows.Forms.Panel pnlPictures;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public BitmapViewer()
{
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();
// TODO: Add any initialization after the InitForm call
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.pnlPictures = new System.Windows.Forms.Panel();
this.SuspendLayout();
//
// pnlPictures
//
this.pnlPictures.AutoScroll = true;
this.pnlPictures.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.pnlPictures.Dock = System.Windows.Forms.DockStyle.Fill;
this.pnlPictures.Location = new System.Drawing.Point(1, 1);
this.pnlPictures.Name = "pnlPictures";
this.pnlPictures.Size = new System.Drawing.Size(530, 218);
this.pnlPictures.TabIndex = 1;
//
// BitmapViewer
//
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.pnlPictures});
this.DockPadding.All = 1;
this.Name = "BitmapViewer";
this.Size = new System.Drawing.Size(532, 220);
this.ResumeLayout(false);
}
#endregion
public delegate void PictureSelectedDelegate(object sender, PictureSelectedEventArgs e);
public event PictureSelectedDelegate PictureSelected;
// The directory that will be scanned for image.
private string directory="";
// Each picture box will be a square of dimension X dimension pixels.
private int dimension;
// The space between the images and the top, left, and right sides.
private int border = 5;
// The space between each image.
private int spacing;
// The images that were found in the selected directory.
private ArrayList images = new ArrayList();
public string Directory
{
get
{
return directory;
}
set
{
directory = value;
GetImages();
UpdateDisplay();
}
}
public int Dimension
{
get
{
return dimension;
}
set
{
dimension = value;
UpdateDisplay();
}
}
public int Spacing
{
get
{
return spacing;
}
set
{
spacing = value;
UpdateDisplay();
}
}
private void GetImages()
{
images.Clear();
if (this.Directory != "" && this.directory != null)
{
DirectoryInfo dir = new DirectoryInfo(directory);
foreach (FileInfo file in dir.GetFiles("*.bmp"))
{
images.Add(new NamedImage(Bitmap.FromFile(file.FullName), file.Name));
}
}
}
private void UpdateDisplay()
{
// Clear the current display.
pnlPictures.Controls.Clear();
// Row and Col will track the current position where pictures are
// being inserted. They begin at the top-right corner.
int row = border, col = border;
// Iterate through the Images collection, and create PictureBox controls.
foreach (NamedImage image in images)
{
PictureBox pic = new PictureBox();
pic.Image = image.Image;
pic.Tag = image.FileName;
pic.Size = new Size(dimension, dimension);
pic.Location = new Point(col, row);
pic.BorderStyle = BorderStyle.FixedSingle;
// StrechImage mode gives us the "thumbnail" ability.
pic.SizeMode = PictureBoxSizeMode.StretchImage;
// Display the picture.
pnlPictures.Controls.Add(pic);
// Move to the next column.
col += dimension + spacing;
// Handle the event.
pic.Click += new EventHandler(this.pic_Click);
// Move to next line if no more pictures will fit.
if ((col + dimension + spacing + border) > this.Width)
{
col = border;
row += dimension + spacing;
}
}
}
public void RefreshImages()
{
GetImages();
UpdateDisplay();
}
protected override void OnSizeChanged(System.EventArgs e)
{
UpdateDisplay();
base.OnSizeChanged(e);
}
private PictureBox picSelected;
private void pic_Click(object sender, System.EventArgs e)
{
// Clear the border style from the last selected picture box.
if (picSelected != null)
{
picSelected.BorderStyle = BorderStyle.FixedSingle;
}
// Get the new selection.
picSelected = (PictureBox)sender;
picSelected.BorderStyle = BorderStyle.Fixed3D;
// Fire the selection event.
PictureSelectedEventArgs args = new
PictureSelectedEventArgs((string)picSelected.Tag, picSelected.Image);
if (PictureSelected != null)
{
PictureSelected(this, args);
}
}
private class NamedImage
{
public Image Image;
public string FileName;
public NamedImage(Image image, string fileName)
{
this.Image = image;
this.FileName = fileName;
}
}
}
public class PictureSelectedEventArgs : EventArgs
{
public string FileName;
public Image Image;
public PictureSelectedEventArgs(String fileName, Image image)
{
this.FileName = fileName;
this.Image = image;
}
}
}
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