sustaining_gazes/gui/OpenFaceDemo/UI_items/CameraSelection.xaml.cs

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7.8 KiB
C#
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2016-10-04 22:08:59 +02:00
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using CppInterop;
using System.Windows.Threading;
using System.Threading;
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namespace OpenFaceDemo
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{
/// <summary>
/// Interaction logic for CameraSelection.xaml
/// </summary>
public partial class CameraSelection : Window
{
List<Border> sample_images;
List<ComboBox> combo_boxes;
// id, width, height
public Tuple<int, int, int> selected_camera;
List<List<Tuple<int, int>>> resolutions_all;
int selected_camera_idx = -1;
// indicate if user clicked on camera
public bool camera_selected = false;
public bool no_cameras_found = false;
public List<Tuple<String, List<Tuple<int, int>>, OpenCVWrappers.RawImage>> cams;
public void PopulateCameraSelections()
{
this.KeyDown += new KeyEventHandler(CameraSelection_KeyDown);
// Finding the cameras here
if (cams == null)
{
String root = AppDomain.CurrentDomain.BaseDirectory;
cams = CameraInterop.Capture.GetCameras(root);
}
int i = 0;
sample_images = new List<Border>();
// Each cameras corresponding resolutions
resolutions_all = new List<List<Tuple<int, int>>>();
combo_boxes = new List<ComboBox>();
foreach (var s in cams)
{
var b = s.Item3.CreateWriteableBitmap();
s.Item3.UpdateWriteableBitmap(b);
b.Freeze();
Dispatcher.Invoke(() =>
{
int idx = i;
Image img = new Image();
img.Source = b;
img.Margin = new Thickness(5);
ColumnDefinition col_def = new ColumnDefinition();
ThumbnailPanel.ColumnDefinitions.Add(col_def);
Border img_border = new Border();
img_border.SetValue(Grid.ColumnProperty, i);
img_border.SetValue(Grid.RowProperty, 0);
img_border.CornerRadius = new CornerRadius(5);
StackPanel img_panel = new StackPanel();
Label camera_name_label = new Label();
camera_name_label.Content = s.Item1;
camera_name_label.HorizontalAlignment = System.Windows.HorizontalAlignment.Center;
img_panel.Children.Add(camera_name_label);
img.Height = 200;
img_panel.Children.Add(img);
img_border.Child = img_panel;
sample_images.Add(img_border);
ThumbnailPanel.Children.Add(img_border);
ComboBox resolutions = new ComboBox();
resolutions.Width = 80;
combo_boxes.Add(resolutions);
resolutions_all.Add(new List<Tuple<int, int>>());
foreach (var r in s.Item2)
{
resolutions.Items.Add(r.Item1 + "x" + r.Item2);
resolutions_all[resolutions_all.Count - 1].Add(new Tuple<int, int>(r.Item1, r.Item2));
}
resolutions.SelectedIndex = 0;
for (int res = 0; res < s.Item2.Count; ++res)
{
if (s.Item2[res].Item1 >= 640 && s.Item2[res].Item2 >= 480)
{
resolutions.SelectedIndex = res;
break;
}
}
resolutions.SetValue(Grid.ColumnProperty, i);
resolutions.SetValue(Grid.RowProperty, 2);
ThumbnailPanel.Children.Add(resolutions);
img_panel.MouseDown += (sender, e) =>
{
ChooseCamera(idx);
};
resolutions.DropDownOpened += (sender, e) =>
{
ChooseCamera(idx);
};
});
i++;
}
if (cams.Count > 0)
{
no_cameras_found = false;
Dispatcher.Invoke(DispatcherPriority.Render, new TimeSpan(0, 0, 0, 0, 200), (Action)(() =>
{
ChooseCamera(0);
}));
}
else
{
string messageBoxText = "No cameras detected, please connect a webcam";
string caption = "Camera error!";
MessageBoxButton button = MessageBoxButton.OK;
MessageBoxImage icon = MessageBoxImage.Warning;
MessageBox.Show(messageBoxText, caption, button, icon);
selected_camera_idx = -1;
no_cameras_found = true;
Dispatcher.Invoke(DispatcherPriority.Render, new TimeSpan(0, 0, 0, 0, 200), (Action)(() =>
{
this.Close();
}));
}
}
public CameraSelection()
{
InitializeComponent();
// We want to display the loading screen first
Thread load_cameras = new Thread(LoadCameras);
load_cameras.Start();
}
public void LoadCameras()
{
Thread.CurrentThread.IsBackground = true;
PopulateCameraSelections();
Dispatcher.Invoke(DispatcherPriority.Render, new TimeSpan(0, 0, 0, 0, 200), (Action)(() =>
{
LoadingGrid.Visibility = System.Windows.Visibility.Hidden;
camerasPanel.Visibility = System.Windows.Visibility.Visible;
}));
}
public CameraSelection(List<Tuple<String, List<Tuple<int, int>>, OpenCVWrappers.RawImage>> cams)
{
InitializeComponent();
this.cams = cams;
PopulateCameraSelections();
Dispatcher.Invoke(DispatcherPriority.Render, new TimeSpan(0, 0, 0, 0, 200), (Action)(() =>
{
LoadingGrid.Visibility = System.Windows.Visibility.Hidden;
camerasPanel.Visibility = System.Windows.Visibility.Visible;
}));
}
private void ChooseCamera(int idx)
{
selected_camera_idx = idx;
foreach (var img in sample_images)
{
img.BorderThickness = new Thickness(1);
img.BorderBrush = Brushes.Gray;
}
sample_images[idx].BorderThickness = new Thickness(4);
sample_images[idx].BorderBrush = Brushes.Green;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
Select();
}
private void CameraSelection_KeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
Select();
}
}
private void Select()
{
camera_selected = true;
int selected_res = combo_boxes[selected_camera_idx].SelectedIndex;
Tuple<int, int> resolution_selected = resolutions_all[selected_camera_idx][selected_res];
selected_camera = new Tuple<int, int, int>(selected_camera_idx, resolution_selected.Item1, resolution_selected.Item2);
this.Close();
}
// Do not close it as user might want to open it again
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
}
}
}