/// <summary>
/// On mouse move
/// </summary>
protected override void OnMouseMove(MouseEventArgs e)
{
// Do base mouse move
base.OnMouseMove(e);
// If not pressing the left mouse button or if the image is empty or fixed selection, return
if (_avoidMouseEvents || e.Button != MouseButtons.Left || Image == null || _selectMode == SelectType.Fixed)
{
_avoidMouseEvents = false;
return;
}
// Get the snapped point
Point snap = GetSnappedPoint(e.Location);
snap.X += snap.X >= _origin.X ? SnapSize.Width : 0;
snap.Y += snap.Y >= _origin.Y ? SnapSize.Height : 0;
// Get selection rectangle
Rectangle rect = new Rectangle();
rect.X = Math.Max(Math.Min(_origin.X, snap.X), 0);
rect.Y = Math.Max(Math.Min(_origin.Y, snap.Y), 0);
rect.Width = Math.Abs(Math.Max(snap.X, 0) - _origin.X);
rect.Height = Math.Abs(Math.Max(snap.Y, 0) - _origin.Y);
// Stay in bounds
rect.Width = rect.Right > Image.Width ? Image.Width - rect.X : rect.Width;
rect.Height = rect.Bottom > Image.Height ? Image.Height - rect.Y : rect.Height;
rect.Width = rect.Width <= 0 ? SnapSize.Width : rect.Width;
rect.Height = rect.Height <= 0 ? SnapSize.Height : rect.Height;
// If there has been no change in movement, return
if (rect == _selection)
{
return;
}
// Set new selection rectangle
_selection = rect;
// Create tiles based on rectangle
_tileBrush = GMareBrush.RectangleToTileBrush(_selection, ImageWidthUnscaled, SnapSize);
// Update
UpdateBackBuffer();
}
/// <summary>
/// On image set
/// </summary>
/// <param name="image">Image reference</param>
protected override void OnImageSet(ref Bitmap image)
{
// Scale the image by the image scale value
ScaleImage();
// Set new selection rectangle
_selection = new Rectangle(Point.Empty, SnapSize);
// Create new tile brush
if (!DesignMode)
{
_tileBrush = new GMareBrush();
}
// Reset selection
_tileBrush = GMareBrush.RectangleToTileBrush(new Rectangle(Point.Empty, SnapSize), SnapSize.Width, SnapSize);
// Update
UpdateBackBuffer();
// Scroll to zero
AutoScrollPosition = Point.Empty;
}
/// <summary>
/// On mouse down
/// </summary>
protected override void OnMouseDown(MouseEventArgs e)
{
// Do base mouse down
base.OnMouseDown(e);
// Set focus on this control
Focus();
// If the image is empty or not pressing the left mouse button, return
if (Image == null)
{
return;
}
// If the right mouse button was clicked, show brush information
if (e.Button == MouseButtons.Right && _tileBrush != null)
{
_tileIdTip.Hide(this);
_tileIdTip.Show(_tileBrush.To2DArrayString(), this, 5000);
}
// If the left mouse button was not clicked, return
if (e.Button != MouseButtons.Left)
{
return;
}
// Get the snapped point
Point snap = GetSnappedPoint(e.Location);
// If not within bounds
if (new Rectangle(0, 0, Image.Width, Image.Height).Contains(snap) == false)
{
return;
}
// Starting point of the selection
_origin = snap;
// Set new selection rectangle
switch (_selectMode)
{
case SelectType.Normal: _selection = new Rectangle(_origin, SnapSize); break;
case SelectType.Fixed:
_selection = new Rectangle(_origin, _selection.Size);
// If the selection is out of bounds, reposition till it is not
while (true)
{
// Move more in bounds
_selection.X -= _selection.Right > Image.Width ? SnapSize.Width : 0;
_selection.Y -= _selection.Bottom > Image.Height ? SnapSize.Height : 0;
// If within bounds, break
if (new Rectangle(0, 0, Image.Width, Image.Height).Contains(_selection) == true)
{
break;
}
}
break;
}
// Create tiles based on rectangle
_tileBrush = GMareBrush.RectangleToTileBrush(_selection, ImageWidthUnscaled, SnapSize);
// Update
UpdateBackBuffer();
}