76 lines
2.5 KiB
C#
76 lines
2.5 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Drawing;
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using System.Windows.Forms;
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namespace WinNodeEditorDemo.Blender
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{
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/// <summary>
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/// 此类仅演示 作为MixRGB节点的下拉选择框弹出菜单
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/// </summary>
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public class FrmEnumSelect : Form
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{
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private Point m_pt;
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private int m_nWidth;
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private float m_scale;
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private List<object> m_lst = new List<object>();
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private StringFormat m_sf;
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public Enum Enum { get; set; }
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private bool m_bClosed;
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public FrmEnumSelect(Enum e, Point pt, int nWidth, float scale) {
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this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
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foreach (var v in Enum.GetValues(e.GetType())) m_lst.Add(v);
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this.Enum = e;
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m_pt = pt;
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m_scale = scale;
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m_nWidth = nWidth;
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m_sf = new StringFormat();
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m_sf.LineAlignment = StringAlignment.Center;
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this.ShowInTaskbar = false;
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this.BackColor = Color.FromArgb(255, 34, 34, 34);
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this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
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}
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protected override void OnLoad(EventArgs e) {
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base.OnLoad(e);
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this.Location = m_pt;
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this.Width = (int)(m_nWidth * m_scale);
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this.Height = (int)(m_lst.Count * 20 * m_scale);
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}
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protected override void OnPaint(PaintEventArgs e) {
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base.OnPaint(e);
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Graphics g = e.Graphics;
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g.ScaleTransform(m_scale, m_scale);
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Rectangle rect = new Rectangle(0, 0, this.Width, 20);
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foreach (var v in m_lst) {
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g.DrawString(v.ToString(), this.Font, Brushes.White, rect, m_sf);
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rect.Y += rect.Height;
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}
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}
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protected override void OnMouseClick(MouseEventArgs e) {
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base.OnMouseClick(e);
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int nIndex = e.Y / (int)(20 * m_scale);
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if (nIndex >= 0 && nIndex < m_lst.Count) this.Enum = (Enum)m_lst[nIndex];
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this.DialogResult = System.Windows.Forms.DialogResult.OK;
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m_bClosed = true;
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}
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protected override void OnMouseLeave(EventArgs e) {
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base.OnMouseLeave(e);
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if (m_bClosed) return;
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//this.DialogResult = System.Windows.Forms.DialogResult.None;
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this.Close();
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}
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}
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}
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