public ResizeBar()
{
ShowGrip = true;
this.Cursor = Cursors.SizeNS;
this.MinimumSize = new Size(0, 13); using (var g = Graphics.FromHwnd(IntPtr.Zero)) {
float dpiY = g.DpiY;
this.Size = new Size(0, Math.Max(13, (int)(13 * dpiY / 120)));
}
VisualStyle = ResizeBarVisualStyle.ModernStrong; SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);
renderer = new Renderer(this);
}
public void Draw(Graphics g, Rectangle bounds, Rectangle grip, TrackBarThumbState state)
{
ResizeBarVisualStyle style = Owner.VisualStyle;
if (!renderWithVisualStyles)
{
if (style == ResizeBarVisualStyle.ModernStrong)
{
style = ResizeBarVisualStyle.ClassicStrong;
}
else if (style == ResizeBarVisualStyle.ModernSubtle)
{
style = ResizeBarVisualStyle.ClassicSubtle;
}
else if (style == ResizeBarVisualStyle.ModernNone)
{
style = ResizeBarVisualStyle.ClassicNone;
}
}
if (style == ResizeBarVisualStyle.ModernStrong || style == ResizeBarVisualStyle.ModernNone)
{
if (state == TrackBarThumbState.Disabled)
{
rBarDisabled.DrawBackground(g, bounds);
}
else
{
if (style == ResizeBarVisualStyle.ModernNone)
{
rBar1.DrawBackground(g, bounds);
}
else
{
TrackBarRenderer.DrawHorizontalThumb(g, bounds, state);
}
}
if (Owner.ShowGrip)
{
DrawGrip(g, grip);
}
}
else if (style == ResizeBarVisualStyle.ModernSubtle)
{
if (state == TrackBarThumbState.Disabled)
{
rBarDisabled.DrawBackground(g, bounds);
if (Owner.ShowGrip)
{
rBarDisabled.DrawBackground(g, grip);
DrawGrip(g, grip, -5);
}
}
else
{
rBar1.DrawBackground(g, bounds);
if (Owner.ShowGrip)
{
TrackBarRenderer.DrawHorizontalThumb(g, grip, state);
DrawGrip(g, grip, -5);
}
}
}
else if (style == ResizeBarVisualStyle.ClassicStrong || style == ResizeBarVisualStyle.ClassicSubtle)
{
Brush bg = brushNormal;
if (state == TrackBarThumbState.Disabled)
{
bg = brushDisabled;
}
else
{
if (style == ResizeBarVisualStyle.ClassicStrong)
{
if (state == TrackBarThumbState.Hot)
{
bg = SystemBrushes.GradientInactiveCaption;
}
else if (state == TrackBarThumbState.Pressed)
{
bg = SystemBrushes.GradientActiveCaption;
}
}
}
g.FillRectangle(bg, bounds);
ControlPaint.DrawBorder(g, bounds, SystemColors.ActiveBorder, ButtonBorderStyle.Solid);
if (Owner.ShowGrip)
{
var r = grip;
if (style == ResizeBarVisualStyle.ClassicSubtle)
{
bg = (state == TrackBarThumbState.Disabled ? brushDisabled : brushNormal);
if (state == TrackBarThumbState.Hot)
{
bg = SystemBrushes.GradientInactiveCaption;
}
else if (state == TrackBarThumbState.Pressed)
{
bg = SystemBrushes.GradientActiveCaption;
}
g.FillRectangle(bg, grip);
ControlPaint.DrawBorder(g, grip, SystemColors.ActiveBorder, ButtonBorderStyle.Solid);
r.Width -= r.Height;
r.X += r.Height / 2;
}
int numLines = Math.Max(2, bounds.Height / 10);
int h = 3 * numLines + (numLines - 1);
int dy = (bounds.Height - h) / 2;
for (int i = 0; i < numLines; i++)
{
g.DrawLine(SystemPens.ControlLight, r.X, r.Y + dy, r.X + r.Width, r.Y + dy);
g.DrawLine(SystemPens.ControlDark, r.X, r.Y + dy + 2, r.X + r.Width, r.Y + dy + 2);
dy += 4;
}
}
}
else if (style == ResizeBarVisualStyle.ClassicNone)
{
int x1 = bounds.X;
int y1 = bounds.Y;
int x2 = bounds.X + bounds.Width;
int y2 = bounds.Y + bounds.Height;
g.FillRectangle(SystemBrushes.Control, bounds);
g.DrawLine(SystemPens.ControlLight, x1 - 1, y1, x1 - 1, y2);
g.DrawLine(SystemPens.ControlLightLight, x1, y1, x1, y2);
g.DrawLine(SystemPens.ScrollBar, x1, y2 - 2, x2, y2 - 2);
g.DrawLine(SystemPens.ControlDark, x1, y2 - 1, x2, y2 - 1);
g.DrawLine(SystemPens.ControlLight, x1, y1, x2, y1);
g.DrawLine(SystemPens.ControlLightLight, x1, y1 + 1, x2, y1 + 1);
g.DrawLine(SystemPens.ScrollBar, x2 - 2, y1, x2 - 2, y2 - 2);
g.DrawLine(SystemPens.ControlDark, x2 - 1, y1, x2 - 1, y2);
}
}
