#region Imports
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using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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using static DPumpHydr.WinFrmUI.RLT.Helper.CrownHelper;
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#endregion
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namespace DPumpHydr.WinFrmUI.RLT.Controls
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{
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#region CrownComboBox
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public class CrownComboBox : ComboBox
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{
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[Browsable(false)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new Color ForeColor { get; set; }
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[Browsable(false)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new Color BackColor { get; set; }
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[Browsable(false)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new FlatStyle FlatStyle { get; set; }
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[Browsable(false)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new ComboBoxStyle DropDownStyle { get; set; }
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private Bitmap _buffer;
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public CrownComboBox() : base()
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{
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SetStyle
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(
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ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.ResizeRedraw |
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ControlStyles.UserPaint,
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true
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);
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DrawMode = DrawMode.OwnerDrawVariable;
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base.FlatStyle = FlatStyle.Flat;
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base.DropDownStyle = ComboBoxStyle.DropDownList;
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}
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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_buffer = null;
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}
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base.Dispose(disposing);
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}
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protected override void OnTabStopChanged(EventArgs e)
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{
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base.OnTabStopChanged(e);
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Invalidate();
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}
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protected override void OnTabIndexChanged(EventArgs e)
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{
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base.OnTabIndexChanged(e);
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Invalidate();
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}
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protected override void OnGotFocus(EventArgs e)
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{
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base.OnGotFocus(e);
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Invalidate();
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}
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protected override void OnLostFocus(EventArgs e)
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{
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base.OnLostFocus(e);
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Invalidate();
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}
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protected override void OnTextChanged(EventArgs e)
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{
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base.OnTextChanged(e);
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Invalidate();
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}
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protected override void OnTextUpdate(EventArgs e)
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{
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base.OnTextUpdate(e);
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Invalidate();
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}
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protected override void OnSelectedValueChanged(EventArgs e)
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{
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base.OnSelectedValueChanged(e);
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Invalidate();
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}
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protected override void OnVisibleChanged(EventArgs e)
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{
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base.OnVisibleChanged(e);
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Invalidate();
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}
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protected override void OnInvalidated(InvalidateEventArgs e)
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{
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base.OnInvalidated(e);
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PaintCombobox();
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}
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protected override void OnResize(EventArgs e)
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{
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base.OnResize(e);
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_buffer = null;
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Invalidate();
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}
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protected override void OnEnabledChanged(EventArgs e)
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{
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base.OnEnabledChanged(e);
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_buffer = null;
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Invalidate();
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}
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private void PaintCombobox()
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{
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if (_buffer == null)
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{
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_buffer = new(ClientRectangle.Width, ClientRectangle.Height);
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}
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using Graphics g = Graphics.FromImage(_buffer);
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Rectangle rect = new(0, 0, ClientSize.Width, ClientSize.Height);
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Color textColor = Enabled ? ThemeProvider.Theme.Colors.LightText : ThemeProvider.Theme.Colors.DisabledText;
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Color borderColor = ThemeProvider.Theme.Colors.GreySelection;
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Color fillColor = ThemeProvider.Theme.Colors.LightBackground;
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if (Focused && TabStop)
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{
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borderColor = ThemeProvider.Theme.Colors.BlueHighlight;
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}
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using (SolidBrush b = new(fillColor))
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{
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g.FillRectangle(b, rect);
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}
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using (Pen p = new(borderColor, 1))
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{
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Rectangle modRect = new(rect.Left, rect.Top, rect.Width - 1, rect.Height - 1);
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g.DrawRectangle(p, modRect);
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}
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Bitmap icon = Properties.Resources.scrollbar_arrow_hot;
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g.DrawImageUnscaled(icon, rect.Right - icon.Width - (ThemeProvider.Theme.Sizes.Padding / 2), (rect.Height / 2) - (icon.Height / 2));
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string text = SelectedItem != null ? SelectedItem.ToString() : Text;
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using (SolidBrush b = new(textColor))
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{
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int padding = 2;
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Rectangle modRect = new(rect.Left + padding, rect.Top + padding, rect.Width - icon.Width - (ThemeProvider.Theme.Sizes.Padding / 2) - (padding * 2), rect.Height - (padding * 2));
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StringFormat stringFormat = new()
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{
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LineAlignment = StringAlignment.Center,
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Alignment = StringAlignment.Near,
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FormatFlags = StringFormatFlags.NoWrap,
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Trimming = StringTrimming.EllipsisCharacter
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};
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g.DrawString(text, Font, b, modRect, stringFormat);
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}
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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if (_buffer == null)
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{
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PaintCombobox();
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}
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Graphics g = e.Graphics;
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g.DrawImageUnscaled(_buffer, Point.Empty);
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}
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protected override void OnDrawItem(DrawItemEventArgs e)
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{
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Graphics g = e.Graphics;
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Rectangle rect = e.Bounds;
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Color textColor = ThemeProvider.Theme.Colors.LightText;
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Color fillColor = ThemeProvider.Theme.Colors.LightBackground;
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if ((e.State & DrawItemState.Selected) == DrawItemState.Selected || (e.State & DrawItemState.Focus) == DrawItemState.Focus || (e.State & DrawItemState.NoFocusRect) != DrawItemState.NoFocusRect)
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{
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fillColor = ThemeProvider.Theme.Colors.BlueSelection;
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}
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using (SolidBrush b = new(fillColor))
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{
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g.FillRectangle(b, rect);
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}
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if (e.Index >= 0 && e.Index < Items.Count)
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{
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string text = Items[e.Index].ToString();
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using SolidBrush b = new(textColor);
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int padding = 2;
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Rectangle modRect = new(rect.Left + padding, rect.Top + padding, rect.Width - (padding * 2), rect.Height - (padding * 2));
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StringFormat stringFormat = new()
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{
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LineAlignment = StringAlignment.Center,
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Alignment = StringAlignment.Near,
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FormatFlags = StringFormatFlags.NoWrap,
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Trimming = StringTrimming.EllipsisCharacter
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};
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g.DrawString(text, Font, b, modRect, stringFormat);
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}
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}
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}
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#endregion
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}
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