diff options
Diffstat (limited to 'platform/windows/gsview/Selection.xaml.cs')
| -rw-r--r-- | platform/windows/gsview/Selection.xaml.cs | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/platform/windows/gsview/Selection.xaml.cs b/platform/windows/gsview/Selection.xaml.cs new file mode 100644 index 00000000..1fe76fd1 --- /dev/null +++ b/platform/windows/gsview/Selection.xaml.cs @@ -0,0 +1,235 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Text; +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; + +namespace gsview +{ + /// <summary> + /// Interaction logic for Selection.xaml + /// </summary> + /// + + public enum SelectStatus_t + { + OK, + CANCEL, + SELECT, + CLOSE, + ZOOMIN, + ZOOMOUT + } + + public class SelectEventArgs : EventArgs + { + Point m_topleft, m_size; + double m_zoomFactor; + SelectStatus_t m_state; + int m_page_num; + Extract_Type_t m_type; + + public Point TopLeft + { + get { return m_topleft; } + } + + public Point Size + { + get { return m_size; } + } + + public double ZoomFactor + { + get { return m_zoomFactor; } + } + + public int PageNum + { + get { return m_page_num; } + } + + public SelectStatus_t State + { + get { return m_state; } + } + + public Extract_Type_t Type + { + get { return m_type; } + } + + public SelectEventArgs(Point start, Point size, double zoom, + SelectStatus_t state, int page, Extract_Type_t type) + { + m_topleft = start; + m_size = size; + m_zoomFactor = zoom; + m_state = state; + m_page_num = page; + m_type = type; + } + } + + public partial class Selection : Window + { + private Point m_startPoint, m_topleft; + private Point m_size; + public SelectStatus_t m_curr_state; + double m_zoom; + double m_old_zoom; + int m_page_num; + private Rectangle m_rect; + Extract_Type_t m_type; + internal delegate void CallBackMain(object gsObject, SelectEventArgs info); + internal event CallBackMain UpdateMain; + + public Selection(int page, double init_zoom, Extract_Type_t type) + { + InitializeComponent(); + this.Closing += new System.ComponentModel.CancelEventHandler(WindowClosing); + m_page_num = page; + m_zoom = init_zoom; + m_curr_state = SelectStatus_t.OK; + m_type = type; + m_rect = null; + } + + void WindowClosing(object sender, System.ComponentModel.CancelEventArgs e) + { + var result = new SelectEventArgs(m_topleft, m_size, m_zoom, + SelectStatus_t.CANCEL, m_page_num, m_type); + UpdateMain(this, result); + } + + private void ClickOK(object sender, RoutedEventArgs e) + { + if (m_curr_state != SelectStatus_t.OK) + return; + if (m_rect == null) + Close(); + else + { + m_size.X = m_rect.Width; + m_size.Y = m_rect.Height; + m_topleft.Y = xaml_Image.Height - m_topleft.Y - m_size.Y; + var result = new SelectEventArgs(m_topleft, m_size, m_zoom, + SelectStatus_t.SELECT, m_page_num, m_type); + UpdateMain(this, result); + } + } + + private void ClickExit(object sender, RoutedEventArgs e) + { + var result = new SelectEventArgs(m_topleft, m_size, m_zoom, + SelectStatus_t.CANCEL, m_page_num, m_type); + UpdateMain(this, result); + Close(); + } + + private void ClickClear(object sender, RoutedEventArgs e) + { + if (m_rect != null) + { + xaml_Canvas.Children.Remove(m_rect); + m_rect = null; + } + } + + private void ZoomIn(object sender, RoutedEventArgs e) + { + if (m_curr_state != SelectStatus_t.OK || m_zoom >= Constants.ZOOM_MAX) + return; + m_old_zoom = m_zoom; + m_zoom = m_zoom + Constants.ZOOM_STEP; + if (m_zoom > Constants.ZOOM_MAX) + { + m_zoom = Constants.ZOOM_MAX; + return; + } + m_curr_state = SelectStatus_t.ZOOMIN; + var result = new SelectEventArgs(m_startPoint, m_size, m_zoom, + SelectStatus_t.ZOOMIN, m_page_num, m_type); + UpdateMain(this, result); + } + + private void ZoomOut(object sender, RoutedEventArgs e) + { + if (m_curr_state != SelectStatus_t.OK || m_zoom <= Constants.ZOOM_MIN) + return; + m_old_zoom = m_zoom; + m_zoom = m_zoom - Constants.ZOOM_STEP; + if (m_zoom < Constants.ZOOM_MIN) + { + m_zoom = Constants.ZOOM_MIN; + return; + } + m_curr_state = SelectStatus_t.ZOOMOUT; + var result = new SelectEventArgs(m_startPoint, m_size, m_zoom, + SelectStatus_t.ZOOMOUT, m_page_num, m_type); + UpdateMain(this, result); + } + + /* Called when we have had a zoom change */ + public void UpdateRect() + { + if (m_rect != null) + { + double left = Canvas.GetLeft(m_rect); + double top = Canvas.GetTop(m_rect); + Canvas.SetLeft(m_rect, left * m_zoom / m_old_zoom); + Canvas.SetTop(m_rect, top * m_zoom / m_old_zoom); + m_rect.Width = m_rect.Width * m_zoom / m_old_zoom; + m_rect.Height = m_rect.Height * m_zoom / m_old_zoom; + } + } + + private void Canvas_MouseDown(object sender, MouseButtonEventArgs e) + { + if (m_rect != null) + { + xaml_Canvas.Children.Remove(m_rect); + } + + m_startPoint = e.GetPosition(xaml_Canvas); + + m_rect = new Rectangle + { + Stroke = Brushes.Red, + StrokeThickness = 2 + }; + Canvas.SetLeft(m_rect, m_startPoint.X); + Canvas.SetTop(m_rect, m_startPoint.X); + xaml_Canvas.Children.Add(m_rect); + } + + private void Canvas_MouseMove(object sender, MouseEventArgs e) + { + if (e.LeftButton == MouseButtonState.Released || m_rect == null) + return; + + var pos = e.GetPosition(xaml_Canvas); + + var x = Math.Min(pos.X, m_startPoint.X); + var y = Math.Min(pos.Y, m_startPoint.Y); + + var w = Math.Max(pos.X, m_startPoint.X) - x; + var h = Math.Max(pos.Y, m_startPoint.Y) - y; + + m_rect.Width = w; + m_rect.Height = h; + + m_topleft.X = x; + m_topleft.Y = y; + Canvas.SetLeft(m_rect, x); + Canvas.SetTop(m_rect, y); + } + } +} |