///<summary>Change button to hover state and repaint if needed.</summary>
protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
{
if (!Enabled)
{
return;
}
base.OnMouseUp(e);
if ((e.Button & MouseButtons.Left) != MouseButtons.Left)
{
return;
}
mouseIsDown = false;
if (butStateL == ODButtonState.Pressed ||
butStateR == ODButtonState.Pressed ||
butStateM == ODButtonState.Pressed)
{
OnScrollComplete();
}
butStateL = ODButtonState.Normal;
butStateR = ODButtonState.Normal;
butStateM = ODButtonState.Normal;
if (GetPathLeft().IsVisible(e.Location))
{
butStateL = ODButtonState.Hover;
}
else if (GetPathRight().IsVisible(e.Location))
{
butStateR = ODButtonState.Hover;
}
else if (GetRectMiddle().Contains(e.Location))
{
butStateM = ODButtonState.Hover;
}
Invalidate();
}
///<summary>Change the button to a pressed state.</summary>
protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
{
if (!Enabled)
{
return;
}
base.OnMouseDown(e);
if ((e.Button & MouseButtons.Left) != MouseButtons.Left)
{
return;
}
mouseIsDown = true;
mouseDownX = e.X;
butStateL = ODButtonState.Normal;
butStateR = ODButtonState.Normal;
butStateM = ODButtonState.Normal;
if (GetPathLeft().IsVisible(e.Location)) //if mouse pressed within the left button
{
butStateL = ODButtonState.Pressed;
originalPixL = (float)MinVal * tick + endW / 2f;
}
else if (GetPathRight().IsVisible(e.Location))
{
butStateR = ODButtonState.Pressed;
originalPixR = (float)MaxVal * tick + endW / 2f;
}
else if (GetRectMiddle().Contains(e.Location))
{
butStateM = ODButtonState.Pressed;
originalPixL = (float)MinVal * tick + endW / 2f;
originalPixR = (float)MaxVal * tick + endW / 2f;
}
Invalidate();
}
private void DrawButton(Graphics g, GraphicsPath pathmain, ODButtonState state)
{
Color clrMain = Color.FromArgb(200, 202, 220);
if (state == ODButtonState.Hover)
{
clrMain = Color.FromArgb(240, 240, 255);
}
else if (state == ODButtonState.Pressed)
{
clrMain = Color.FromArgb(150, 150, 160);
}
GraphicsPath pathsub = new GraphicsPath();
RectangleF rect = pathmain.GetBounds();
pathsub.AddEllipse(rect.Left - rect.Width / 8f, rect.Top - rect.Height / 2f, rect.Width, rect.Height * 3f / 2f);
PathGradientBrush pathBrush = new PathGradientBrush(pathsub);
pathBrush.CenterColor = Color.FromArgb(255, 255, 255, 255);
pathBrush.SurroundColors = new Color[] { Color.FromArgb(0, 255, 255, 255) };
g.FillPath(new SolidBrush(clrMain), pathmain);
g.FillPath(pathBrush, pathmain);
Color clrDarkOverlay = Color.FromArgb(50, 125, 125, 125);
LinearGradientBrush brush = new LinearGradientBrush(new PointF(rect.Left, rect.Bottom),
new PointF(rect.Left, rect.Top + rect.Height / 2), Color.FromArgb(0, 0, 0, 0),
Color.FromArgb(50, 0, 0, 0));
g.FillPath(brush, pathmain);
Pen outline = new Pen(Color.FromArgb(28, 81, 128));
g.DrawPath(outline, pathmain);
}
///<summary></summary>
protected override void OnMouseDown(MouseEventArgs mea)
{
base.OnMouseDown(mea);
if (mea.Button == MouseButtons.Left)
{
_bCanClick = true;
_buttonState = ODButtonState.Pressed;
this.Invalidate();
}
}
///<summary></summary>
protected override void OnClick(EventArgs ea)
{
this.Capture = false;
_bCanClick = false;
if (this.ClientRectangle.Contains(this.PointToClient(Control.MousePosition)))
{
_buttonState = ODButtonState.Hover;
}
else
{
_buttonState = ODButtonState.Normal;
}
this.Invalidate();
base.OnClick(ea);
}
///<summary></summary>
protected override void OnMouseMove(MouseEventArgs mea)
{
base.OnMouseMove(mea);
if (ClientRectangle.Contains(mea.X, mea.Y))
{
if (_buttonState == ODButtonState.Hover && this.Capture && !_bCanClick)
{
_bCanClick = true;
_buttonState = ODButtonState.Pressed;
this.Invalidate();
}
}
else
{
if (_buttonState == ODButtonState.Pressed)
{
_bCanClick = false;
_buttonState = ODButtonState.Hover;
this.Invalidate();
}
}
}
///<summary>Resets button appearance. Repaints only if necessary.</summary>
protected override void OnMouseLeave(System.EventArgs e)
{
if (!Enabled)
{
return;
}
base.OnMouseLeave(e);
if (mouseIsDown) //mouse is down
//if a button is pressed, it will remain so, even if leave. As long as mouse is down.
//,so do nothing.
//Also, if a button is not pressed, nothing will happen when leave
//,so do nothing.
{
}
else //mouse is not down
{
butStateL = ODButtonState.Normal;
butStateR = ODButtonState.Normal;
butStateM = ODButtonState.Normal;
Invalidate();
}
}
///<summary></summary>
protected override void OnMouseEnter(EventArgs ea)
{
base.OnMouseEnter(ea);
_buttonState = ODButtonState.Hover;
this.Invalidate();
}
///<summary></summary>
protected override void OnEnabledChanged(EventArgs ea)
{
base.OnEnabledChanged(ea);
_buttonState = ODButtonState.Normal;
this.Invalidate();
}
///<summary></summary>
protected override void OnMouseLeave(EventArgs ea)
{
base.OnMouseLeave(ea);
_buttonState = ODButtonState.Normal;
this.Invalidate();
}
///<summary></summary>
protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
{
if (!Enabled)
{
return;
}
base.OnMouseMove(e);
tick = (float)(Width - endW - 1) / 255f;
if (mouseIsDown)
{
int minAllowedL = 0;
int maxAllowedL;
int minAllowedR;
int maxAllowedR = 255;
float deltaPix = mouseDownX - e.X;
if (butStateL == ODButtonState.Pressed)
{
MinVal = (int)((originalPixL - deltaPix - endW / 2f) / tick);
maxAllowedL = MaxVal - (int)(endW / tick);
if (MinVal < minAllowedL)
{
MinVal = minAllowedL;
}
else if (MinVal > maxAllowedL)
{
MinVal = maxAllowedL;
}
OnScroll();
}
else if (butStateR == ODButtonState.Pressed)
{
MaxVal = (int)((originalPixR - deltaPix - endW / 2f) / tick);
minAllowedR = MinVal + (int)(endW / tick);
if (MaxVal < minAllowedR)
{
MaxVal = minAllowedR;
}
else if (MaxVal > maxAllowedR)
{
MaxVal = maxAllowedR;
}
OnScroll();
}
else if (butStateM == ODButtonState.Pressed)
{
MinVal = (int)((originalPixL - deltaPix - endW / 2f) / tick);
MaxVal = (int)((originalPixR - deltaPix - endW / 2f) / tick);
int originalValSpan = (int)((originalPixR - originalPixL) / tick);
maxAllowedL = maxAllowedR - originalValSpan;
minAllowedR = minAllowedL + originalValSpan;
if (MinVal < minAllowedL)
{
MinVal = minAllowedL;
}
else if (MinVal > maxAllowedL)
{
MinVal = maxAllowedL;
}
if (MaxVal < minAllowedR)
{
MaxVal = minAllowedR;
}
else if (MaxVal > maxAllowedR)
{
MaxVal = maxAllowedR;
}
OnScroll();
}
}
else //mouse is not down
{
butStateL = ODButtonState.Normal;
butStateR = ODButtonState.Normal;
butStateM = ODButtonState.Normal;
if (GetPathLeft().IsVisible(e.Location))
{
butStateL = ODButtonState.Hover;
}
else if (GetPathRight().IsVisible(e.Location))
{
butStateR = ODButtonState.Hover;
}
else if (GetRectMiddle().Contains(e.Location))
{
butStateM = ODButtonState.Hover;
}
}
Invalidate();
}
