/// <summary>
/// Called when the mouse pressed on the zoom/pan selection canvas.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="MouseButtonEventArgs"/> instance containing the event data.</param>
protected virtual void OnSelectionCanvasMouseDown(object sender, MouseButtonEventArgs e)
{
Mouse.Capture(_selection_canvas);
_selection_start_point = e.GetPosition(_selection_canvas);
_current_mouse_position = _selection_start_point;
_last_mouse_position = _current_mouse_position;
if (e.ClickCount == 2)
{
_zoom_rect = new System.Drawing.RectangleF();
_is_scaled = false;
ZoomRectChanged?.Invoke(this, new EventArgs());
}
else if (Keyboard.IsKeyDown(Key.LeftCtrl))
{
_selection_rectangle.Width = 0;
_selection_rectangle.Height = 0;
_is_selection_mouse_down_zoom = true;
_is_selection_mouse_down_pan = false;
_selection_rectangle.Visibility = Visibility.Visible;
}
else
{
_is_selection_mouse_down_pan = true;
}
}
/// <summary>
/// Called when the mouse released from the zoom/pan selection canvas.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event arguments.</param>
protected virtual void OnSelectionCanvasPointerReleased(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
{
_selection_canvas.ReleasePointerCapture(e.Pointer);
if (_is_selection_mouse_down_pan)
{
_is_selection_mouse_down_pan = false;
}
else if (_is_selection_mouse_down_zoom)
{
_is_selection_mouse_down_zoom = false;
_zoom_rect = new System.Drawing.RectangleF((float)Canvas.GetLeft(_selection_rectangle), (float)Canvas.GetTop(_selection_rectangle), (float)_selection_rectangle.Width, (float)_selection_rectangle.Height);
_selection_rectangle.Visibility = Visibility.Collapsed;
_is_scaled = true;
ZoomRectChanged?.Invoke(this, new EventArgs());
}
}
/// <summary>
/// Called when the mouse released from the zoom/pan selection canvas.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="MouseButtonEventArgs"/> instance containing the event data.</param>
protected virtual void OnSelectionCanvasMouseUp(object sender, MouseButtonEventArgs e)
{
_selection_canvas.ReleaseMouseCapture();
if (_is_selection_mouse_down_pan)
{
_is_selection_mouse_down_pan = false;
}
else if (_is_selection_mouse_down_zoom)
{
_is_selection_mouse_down_zoom = false;
_zoom_rect = new System.Drawing.RectangleF((float)Canvas.GetLeft(_selection_rectangle), (float)Canvas.GetTop(_selection_rectangle), (float)_selection_rectangle.Width, (float)_selection_rectangle.Height);
_selection_rectangle.Visibility = Visibility.Hidden;
_is_scaled = true;
ZoomRectChanged?.Invoke(this, new EventArgs());
}
}
/// <summary>
/// Handles the On Selection Canvas Double Tapped event.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event arguments.</param>
protected virtual void OnSelectionCanvasDoubleTapped(object sender, Windows.UI.Xaml.Input.DoubleTappedRoutedEventArgs e)
{
_zoom_rect = new System.Drawing.RectangleF();
_is_scaled = false;
ZoomRectChanged?.Invoke(this, new EventArgs());
}
/// <summary>
/// Called when the mouse moves over the zoom/pan selection canvas.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The event arguments.</param>
protected virtual void OnSelectionCanvasPointerMoved(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
{
_current_mouse_position = e.GetCurrentPoint(_selection_canvas).Position;
if (_is_selection_mouse_down_zoom && IsCtrlDown())
{
Canvas.SetLeft(_selection_rectangle, _selection_start_point.X);
Canvas.SetTop(_selection_rectangle, _selection_start_point.Y);
Point _selection_current_point = _current_mouse_position;
if (_selection_current_point.X - _selection_start_point.X > 1)
{
_selection_rectangle.Width = _selection_current_point.X - _selection_start_point.X;
}
if (_selection_current_point.Y - _selection_start_point.Y > 1)
{
_selection_rectangle.Height = _selection_current_point.Y - _selection_start_point.Y;
}
if (_selection_current_point.X < _selection_start_point.X)
{
Canvas.SetLeft(_selection_rectangle, _selection_current_point.X);
_selection_rectangle.Width = _selection_start_point.X - _selection_current_point.X;
}
if (_selection_current_point.Y < _selection_start_point.Y)
{
Canvas.SetTop(_selection_rectangle, _selection_current_point.Y);
_selection_rectangle.Height = _selection_start_point.Y - _selection_current_point.Y;
}
}
else if (_is_selection_mouse_down_pan && _is_scaled)
{
Point _selection_current_point = _current_mouse_position;
double delta_x = _current_mouse_position.X - _last_mouse_position.X;
double delta_y = _current_mouse_position.Y - _last_mouse_position.Y;
double x = _zoom_rect.Left - delta_x;
double y = _zoom_rect.Top - delta_y;
if (x < 0)
{
x = 0;
}
if (y < 0)
{
y = 0;
}
if (x + _zoom_rect.Width > _size.Width)
{
x = x - (x + _zoom_rect.Width - _size.Width);
}
if (y + _zoom_rect.Height > _size.Height)
{
y = y - (y + _zoom_rect.Height - _size.Height);
}
_zoom_rect = new System.Drawing.RectangleF((float)x, (float)y, _zoom_rect.Width, _zoom_rect.Height);
ZoomRectChanged?.Invoke(this, new EventArgs());
}
_last_mouse_position = _current_mouse_position;
}
/// <summary>
/// Called when the mouse moves over the zoom/pan selection canvas.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="MouseEventArgs"/> instance containing the event data.</param>
protected virtual void OnSelectionCanvasMouseMove(object sender, MouseEventArgs e)
{
_current_mouse_position = e.GetPosition(_selection_canvas);
if (_is_selection_mouse_down_zoom && Keyboard.IsKeyDown(Key.LeftCtrl))
{
Canvas.SetLeft(_selection_rectangle, _selection_start_point.X);
Canvas.SetTop(_selection_rectangle, _selection_start_point.Y);
Point _selection_current_point = e.GetPosition(_selection_canvas);
if (_selection_current_point.X - _selection_start_point.X > 1)
{
_selection_rectangle.Width = _selection_current_point.X - _selection_start_point.X;
}
if (_selection_current_point.Y - _selection_start_point.Y > 1)
{
_selection_rectangle.Height = _selection_current_point.Y - _selection_start_point.Y;
}
if (_selection_current_point.X < _selection_start_point.X)
{
Canvas.SetLeft(_selection_rectangle, _selection_current_point.X);
_selection_rectangle.Width = _selection_start_point.X - _selection_current_point.X;
}
if (_selection_current_point.Y < _selection_start_point.Y)
{
Canvas.SetTop(_selection_rectangle, _selection_current_point.Y);
_selection_rectangle.Height = _selection_start_point.Y - _selection_current_point.Y;
}
}
else if (_is_selection_mouse_down_pan && _is_scaled)
{
Point _selection_current_point = e.GetPosition(_selection_canvas);
double delta_x = _current_mouse_position.X - _last_mouse_position.X;
double delta_y = _current_mouse_position.Y - _last_mouse_position.Y;
double x = _zoom_rect.Left - delta_x;
double y = _zoom_rect.Top - delta_y;
if (x < 0)
{
x = 0;
}
if (y < 0)
{
y = 0;
}
if (x + _zoom_rect.Width > _size.Width)
{
x = x - (x + _zoom_rect.Width - _size.Width);
}
if (y + _zoom_rect.Height > _size.Height)
{
y = y - (y + _zoom_rect.Height - _size.Height);
}
_zoom_rect = new System.Drawing.RectangleF((float)x, (float)y, _zoom_rect.Width, _zoom_rect.Height);
ZoomRectChanged?.Invoke(this, new EventArgs());
}
_last_mouse_position = _current_mouse_position;
OnApplyToolTip(_last_mouse_position);
}
