Sunji-posv-net/pos/POSV.Template/TransparentShortcut.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Windows.Forms;
using DevComponents.DotNetBar.Controls;
using DevComponents.DotNetBar.Metro;
using POSV.Component;

namespace POSV
{
    public partial class TransparentShortcut : BaseForm
    {
        private ePointerSide _pointerSide = ePointerSide.Left;

        private Rectangle _pointerBounds = Rectangle.Empty;

        private readonly Control _content = null;

        private readonly Control _overlay = null;

        public TransparentShortcut(Control overlay , double opacity , Control content , Rectangle pointerBounds)
        {
            this.SetStyle(ControlStyles.UserPaint , true);
            this.SetStyle(ControlStyles.AllPaintingInWmPaint , true);
            this.SetStyle(ControlStyles.ResizeRedraw , true);
            this.SetStyle(ControlStyles.OptimizedDoubleBuffer , true);

            InitializeComponent();

            this._overlay = overlay;

            this._content = content;
            
            this._pointerBounds = pointerBounds;

            //无边框
            this.FormBorderStyle = FormBorderStyle.None;
            //透明度
            this.Opacity = opacity;
            //最大化/最小化
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.ShowIcon = false;
            this.ShowInTaskbar = false;
            //窗口位置和大小
            this.StartPosition = FormStartPosition.Manual;

            Rectangle rect = new Rectangle(overlay.PointToScreen(Point.Empty) , overlay.Size);

            this.Location = new Point(rect.X , rect.Y);
            this.Size = new Size(rect.Width , rect.Height);

            this.flyout.PointerSide = this._pointerSide;
            this.flyout.Content = this._content;

            if (this.flyout.Content is AbstractFlyoutPanelEx)
            {
                AbstractFlyoutPanelEx target = this.flyout.Content as AbstractFlyoutPanelEx;

                target.CancelButtonClick += (o , args) =>
                {
                    if (target.IsDisposed) return;

                    this.flyout.Close();
                };

                target.AcceptButtonClick += (o , args) =>
                {
                    this.flyout.Close();
                };
            }

        }

        public TransparentShortcut(Control overlay , Control content , Rectangle pointerBounds):this(overlay,.3,content,pointerBounds)
        {

        }
        public virtual Size GetContentSize()
        {
            Size size = this._content.Size;
            size.Width += 12 + 2;
            size.Height += 2;

            return size;
        }

        protected override void OnActivated(EventArgs e)
        {
            base.OnActivated(e);

            //以当前点击按钮的Top为基准,计算上下两部分空白高度
            int y_top = this._pointerBounds.Y - this.Location.Y - 30;
            int y_bottom = this.Location.Y + this.Size.Height - this._pointerBounds.Y - 30;

            //内容控件的显示区域
            Rectangle flyoutBounds = new Rectangle();
            flyoutBounds.Size = GetContentSize();

            int pointerOffset = 10;

            if (y_top >= flyoutBounds.Size.Height / 2 && y_bottom >= flyoutBounds.Size.Height / 2)
            {
                //居中
                flyoutBounds.Location = new Point(this.Location.X , _pointerBounds.Location.Y - (flyoutBounds.Size.Height - this._pointerBounds.Size.Height - 24) / 2);
                pointerOffset = _pointerBounds.Location.Y - flyoutBounds.Location.Y + 12; 
            }
            else if (y_top < flyoutBounds.Size.Height / 2 && y_bottom >= flyoutBounds.Size.Height / 2)
            {
                //居下
                flyoutBounds.Location = new Point(this.Location.X , this._pointerBounds.Y);
                pointerOffset = this._pointerBounds.Size.Height / 2 - 12;
            }
            else
            {
                //居上
                flyoutBounds.Location = new Point(this.Location.X , (_pointerBounds.Location.Y + this._pointerBounds.Size.Height - flyoutBounds.Size.Height));
                pointerOffset = _pointerBounds.Location.Y  - flyoutBounds.Location.Y + 12;
            }
            flyout.Show(flyoutBounds , this._pointerSide, pointerOffset , this._content);
        }

        private void OnFlyoutClosed(object sender , FormClosedEventArgs e)
        {
            this.Close();
        }

        private void OnFlyoutShowing(object sender , FlyoutShowingEventArgs e)
        {
            
        }

        private void OnFlyoutClosing(object sender, FormClosingEventArgs e)
        {
            var item = sender as Flyout;
            if (item.Content != null && item.Content is AbstractFlyoutPanelEx)
            {
                var target = item.Content as AbstractFlyoutPanelEx;

                target.CloseFlyout();
            }
        }
    }
}