using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using Touchless.Vision.Camera;namespace Demo{ public partial class MainForm : Form { public MainForm() { InitializeComponent(); } private void MainForm_Load(object sender, EventArgs e) { if (!DesignMode) { // Refresh the list of available cameras comboBoxCameras.Items.Clear(); foreach (Camera cam in CameraService.AvailableCameras) comboBoxCameras.Items.Add(cam); if (comboBoxCameras.Items.Count > 0) comboBoxCameras.SelectedIndex = 0; } } private void MainForm_FormClosing(object sender, FormClosingEventArgs e) { thrashOldCamera(); } private void btnStop_Click(object sender, EventArgs e) { thrashOldCamera(); } private CameraFrameSource _frameSource; private static Bitmap _latestFrame; private void btnStart_Click(object sender, EventArgs e) { // Early return if we've selected the current camera if (_frameSource != null && _frameSource.Camera == comboBoxCameras.SelectedItem) return; thrashOldCamera(); startCapturing(); } private void startCapturing() { try { Camera c = (Camera)comboBoxCameras.SelectedItem; setFrameSource(new CameraFrameSource(c)); _frameSource.Camera.CaptureWidth = 320; _frameSource.Camera.CaptureHeight = 240; _frameSource.Camera.Fps = 20; _frameSource.NewFrame = OnImageCaptured; pictureBoxDisplay.Paint = new PaintEventHandler(drawLatestImage); _frameSource.StartFrameCapture(); } catch (Exception ex) { comboBoxCameras.Text = "Select A Camera"; MessageBox.Show(ex.Message); } } private void drawLatestImage(object sender, PaintEventArgs e) { if (_latestFrame != null) { // Draw the latest image from the active camera e.Graphics.DrawImage(_latestFrame, 0, 0, _latestFrame.Width, _latestFrame.Height); } } public void OnImageCaptured(Touchless.Vision.Contracts.IFrameSource frameSource, Touchless.Vision.Contracts.Frame frame, double fps) { _latestFrame = frame.Image; pictureBoxDisplay.Invalidate(); } private void setFrameSource(CameraFrameSource cameraFrameSource) { if (_frameSource == cameraFrameSource) return; _frameSource = cameraFrameSource; } // private void thrashOldCamera() { // Trash the old camera if (_frameSource != null) { _frameSource.NewFrame -= OnImageCaptured; _frameSource.Camera.Dispose(); setFrameSource(null); pictureBoxDisplay.Paint -= new PaintEventHandler(drawLatestImage); } } // private void btnSave_Click(object sender, EventArgs e) { if (_frameSource == null) return; Bitmap current = (Bitmap)_latestFrame.Clone(); using (SaveFileDialog sfd = new SaveFileDialog()) { sfd.Filter = "*.bmp|*.bmp"; if (sfd.ShowDialog() == DialogResult.OK) { current.Save(sfd.FileName); } } current.Dispose(); } private void btnConfig_Click(object sender, EventArgs e) { // snap camera if (_frameSource != null) _frameSource.Camera.ShowPropertiesDialog(); } }}
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