linear-app-launcher/Windows/Forms/Tile/TileContainer.cs

using AppLauncher.Models;
using System;
using System.Drawing;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AppLauncher.Windows.Forms
{
    public partial class TileContainer : AUserControl
    {
        protected int collapseIncrement = 6;
        protected int expandIncrement = 8;
        protected TileGroupModel groupInfo = null;
        protected bool isAnimating = false;

        public TileContainer(TileGroupModel model) : base()
        {
            InitializeComponent();

            this.ContextMenuStrip = contextMenuStrip1;
            //this.BackColor = Color.MistyRose;

            label1.TileGroupPanel = this;

            groupInfo = model;

            label1.TitleText = groupInfo.Title;
            panel1.SetGridSize(groupInfo.GridSize.Width, groupInfo.GridSize.Height);
            this.Width = panel1.Width;
            label1.Checked = groupInfo.IsExpanded;
            panel1.LoadTiles(model.Items);
            panel1.Resize += panel1_Resize;
        }

        protected override async void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            label1.Width = panel1.Width;

            this.Margin = new Padding(0, 0, 0, 0);
            this.Padding = new Padding(0, 0, 0, 20);
            //this.MaximumSize = new Size(panel1.Width, ExpandedHeight);
            //this.MinimumSize = new Size(panel1.Width, label1.Height);
            //this.Size = this.MaximumSize;
            this.Size = new Size(panel1.Width, this.ExpandedHeight);
        }

        private async void panel1_Resize(object sender, EventArgs e)
        {
            await this.InvalidateContainer();
        }

        public int CollapseHeight => label1.Height + panel1.CollapseHeight;

        public int ExpandedHeight => label1.Height + panel1.ExpandedHeight + this.Padding.Top + this.Padding.Bottom;

        public bool IsAnimating => isAnimating;

        public async Task Collapse()
        {
            await Task.Run(() =>
            {
                if (isAnimating) return;

                isAnimating = true;

                while (this.Height > this.CollapseHeight)
                {
                    if (this.InvokeRequired)
                    {
                        this.Invoke(new MethodInvoker(() => {
                            this.Height -= collapseIncrement;
                        }));
                    }
                    else
                    {
                        this.Height -= collapseIncrement;
                    }

                    Thread.Sleep(10);
                }

                isAnimating = false;
            });
        }

        public async Task CollapseNow()
        {
            await Task.Run(() =>
            {
                if (isAnimating) return;

                isAnimating = true;

                if (this.InvokeRequired)
                {
                    this.Invoke(new MethodInvoker(() => {
                        this.Height = this.CollapseHeight;
                    }));
                }
                else
                {
                    this.Height = this.CollapseHeight;
                }

                isAnimating = false;
            });
        }

        public async Task Expand()
        {
            await Task.Run(() =>
            {
                if (isAnimating) return;

                isAnimating = true;

                while (this.Height < this.ExpandedHeight)
                {
                    if (this.InvokeRequired)
                    {
                        this.Invoke(new MethodInvoker(() => {
                            this.Height += expandIncrement;
                            this.Invalidate();
                        }));
                    }
                    else
                    {
                        this.Height += expandIncrement;
                        this.Invalidate();
                    }

                    Thread.Sleep(10);
                }

                isAnimating = false;
            });
        }

        public async Task InvalidateContainer(bool animate = true)
        {
            if (this.IsAnimating)
            {
                return;
            }

            if (label1.Checked)
            {
                await this.Expand();
            }
            else
            {
                if (animate)
                {
                    await this.Collapse();
                }
                else
                {
                    await this.CollapseNow();
                }
            }
        }

        private void addToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AddTileForm addForm = new AddTileForm(panel1);
            addForm.ShowDialog();
        }

    }
}