C # rounded corner button,

C # rounded corner button,

Because the built-in button is not very nice-looking, here I am looking for a code on the Internet to change it into a self-use button, the painting operation is not limited to the button, you can also draw other

Using System; using System. collections. generic; using System. componentModel; using System. data; using System. drawing; using System. drawing. drawing2D; using System. linq; using System. text; using System. threading. tasks; using System. windows. forms; namespace ExerciseUIPrj {public partial class XButton: Button {enum model {hover, enter, press, enable} public Color HoverBackColor {get; set;} public Color EnterBackColor {get; set;} public Color PressBackColor {get; set;} public Color HoverForeColor {get; set;} public Color EnterForeColor {get; set;} public Color PressForeColor {get; set ;} public int Radius {get; set;} model paintmodel = model. hover; public XButton () {InitializeComponent (); // These must be carried, otherwise there will be a Black edge FlatStyle = FlatStyle. flat; FlatAppearance. borderSize = 0; FlatAppearance. borderColor = Color. fromArgb (0, 0, 0, 0); FlatAppearance. mouseDownBackColor = Color. transparent; FlatAppearance. mouseOverBackColor = Color. transparent; SetDefaultColor ();} public void SetDefaultColor () {// give the initial value HoverBackColor = Color. lightBlue; EnterBackColor = Color. blue; PressBackColor = Color. darkBlue; HoverForeColor = Color. white; EnterForeColor = Color. white; PressForeColor = Color. white; Radius = 18 ;}

　　　　　　

        protected override void OnLayout(LayoutEventArgs levent)        {            SetDefaultColor();            Refresh();            base.OnLayout(levent);        }        protected override void OnParentChanged(EventArgs e)        {            Parent.SizeChanged += delegate { Refresh(); };            base.OnParentChanged(e);        }

 

Protected override void OnPaint (PaintEventArgs e) {base. onPaint (e); // This cannot be used, and it must be placed in front of it. Otherwise there will be some inexplicable things such as the Black Box var colorback = HoverBackColor; var colorfore = HoverForeColor; switch (paintmodel) {case model. hover: colorback = HoverBackColor; colorfore = HoverForeColor; break; case model. enter: colorback = EnterBackColor; colorfore = EnterForeColor; break; case model. press: colorback = PressBackColor; colgrading Ore = PressForeColor; break; case model. enable: colorback = Color. lightGray; break; default: colorback = HoverBackColor; colorfore = HoverForeColor; break;} Draw (e. clipRectangle, e. graphics, false, colorback); DrawText (e. clipRectangle, e. graphics, colorfore);} protected override void OnMouseEnter (EventArgs e) {paintmodel = model. enter; base. onMouseEnter (e);} protected override void OnMouseLeav E (EventArgs e) {paintmodel = model. hover; base. onMouseLeave (e);} protected override void OnMouseDown (MouseEventArgs mevent) {paintmodel = model. press; base. onMouseDown (mevent);} protected override void OnEnabledChanged (EventArgs e) {paintmodel = Enabled? Model. hover: model. enable; Invalidate (); // when the value of false is converted to true, the base is forcibly refreshed here. onEnabledChanged (e);} void Draw (Rectangle rectangle, Graphics g, bool cusp, Color begin_color, Color? End_colorex = null) {Color end_color = end_colorex = null? Begin_color: (Color) end_colorex; int span = 2; // g. smoothingMode = SmoothingMode. antiAlias; // gradient filled LinearGradientBrush myLinearGradientBrush = new LinearGradientBrush (rectangle, begin_color, end_color, LinearGradientMode. vertical); // draw a vertex if (cusp) {span = 10; PointF p1 = new PointF (rectangle. width-12, rectangle. Y + 10); PointF p2 = new PointF (rectangle. width-12, rectangle. Y + 30); PointF p3 = new PointF (rectangle. width, rectangle. Y + 20); PointF [] ptsArray = {p1, p2, p3}; g. fillPolygon (myLinearGradientBrush, ptsArray);} // fill g. fillPath (myLinearGradientBrush, DrawRoundRect (rectangle. x, rectangle. y, rectangle. width-span, rectangle. height-1, Radius);} void DrawText (Rectangle rectangle, Graphics g, Color color) {SolidBrush sbr = new SolidBrush (color); var rect = new RectangleF (); switch (TextAlign) {case ContentAlignment. middleCenter: rect = getTextRec (rectangle, g); break; default: rect = getTextRec (rectangle, g); break;} g. drawString (Text, Font, sbr, rect);} RectangleF getTextRec (Rectangle rectangle, Graphics g) {var rect = new RectangleF (); var size = g. measureString (Text, Font); if (size. width> rectangle. width | size. height> rectangle. height) {rect = rectangle;} else {rect. size = size; rect. location = new PointF (rectangle. X + (rectangle. width-size. width)/2, rectangle. Y + (rectangle. height-size. height)/2);} return rect;} GraphicsPath DrawRoundRect (int x, int y, int width, int height, int radius) {// GraphicsPath gp = new GraphicsPath (); gp. addArc (x, y, radius, radius, 180, 90); gp. addArc (width-radius, y, radius, radius, 270, 90); gp. addArc (width-radius, height-radius, 0, 90); gp. addArc (x, height-radius, 90, 90); gp. closeAllFigures (); return gp ;}}}