// COPYRIGHT (C) Tom. ALL RIGHTS RESERVED.
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// THE AntdUI PROJECT IS AN WINFORM LIBRARY LICENSED UNDER THE Apache-2.0 License.
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// LICENSED UNDER THE Apache License, VERSION 2.0 (THE "License")
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// YOU MAY NOT USE THIS FILE EXCEPT IN COMPLIANCE WITH THE License.
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// YOU MAY OBTAIN A COPY OF THE LICENSE AT
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING, SOFTWARE
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// DISTRIBUTED UNDER THE LICENSE IS DISTRIBUTED ON AN "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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// SEE THE LICENSE FOR THE SPECIFIC LANGUAGE GOVERNING PERMISSIONS AND
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// LIMITATIONS UNDER THE License.
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// GITEE: https://gitee.com/antdui/AntdUI
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// GITHUB: https://github.com/AntdUI/AntdUI
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// CSDN: https://blog.csdn.net/v_132
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// QQ: 17379620
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using System;
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using System.Collections.Generic;
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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 System.Windows.Forms.Layout;
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namespace AntdUI
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{
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/// <summary>
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/// StackPanel 堆栈布局
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/// </summary>
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[Description("StackPanel 堆栈布局")]
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[ToolboxItem(true)]
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[DefaultProperty("Vertical")]
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[Designer(typeof(IControlDesigner))]
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public class StackPanel : IControl
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{
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bool autoscroll = false;
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/// <summary>
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/// 是否显示滚动条
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/// </summary>
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[Description("是否显示滚动条"), Category("外观"), DefaultValue(false)]
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public bool AutoScroll
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{
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get => autoscroll;
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set
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{
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if (autoscroll == value) return;
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autoscroll = value;
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if (autoscroll) ScrollBar = new ScrollBar(this);
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else ScrollBar = null;
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IOnSizeChanged();
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}
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}
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/// <summary>
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/// 滚动条
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/// </summary>
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[Browsable(false)]
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public ScrollBar? ScrollBar;
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public override Rectangle DisplayRectangle
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{
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get
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{
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var rect = ClientRectangle.DeflateRect(Padding);
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if (ScrollBar != null && ScrollBar.Show)
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{
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if (ScrollBar.EnabledY) rect.Width -= ScrollBar.SIZE;
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else rect.Height -= ScrollBar.SIZE;
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}
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return rect;
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}
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}
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/// <summary>
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/// 是否垂直方向
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/// </summary>
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[Description("是否垂直方向"), Category("外观"), DefaultValue(false)]
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public bool Vertical
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{
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get => layoutengine.Vertical;
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set
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{
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if (layoutengine.Vertical == value) return;
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layoutengine.Vertical = value;
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if (autoscroll) ScrollBar = new ScrollBar(this);
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else ScrollBar = null;
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IOnSizeChanged();
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}
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}
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/// <summary>
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/// 内容大小
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/// </summary>
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[Description("内容大小"), Category("外观"), DefaultValue(null)]
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public string? ItemSize
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{
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get => layoutengine.ItemSize;
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set
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{
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if (layoutengine.ItemSize == value) return;
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layoutengine.ItemSize = value;
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IOnSizeChanged();
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}
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}
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/// <summary>
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/// 间距
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/// </summary>
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[Description("间距"), Category("外观"), DefaultValue(0)]
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public int Gap
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{
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get => layoutengine.Gap;
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set
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{
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if (layoutengine.Gap == value) return;
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layoutengine.Gap = value;
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IOnSizeChanged();
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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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ScrollBar?.Paint(e.Graphics.High());
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base.OnPaint(e);
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}
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#region 布局
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protected override void OnSizeChanged(EventArgs e)
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{
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var rect = ClientRectangle;
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ScrollBar?.SizeChange(rect);
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base.OnSizeChanged(e);
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}
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StackLayout layoutengine = new StackLayout();
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public override LayoutEngine LayoutEngine => layoutengine;
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internal class StackLayout : LayoutEngine
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{
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/// <summary>
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/// 是否垂直方向
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/// </summary>
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public bool Vertical { get; set; } = false;
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/// <summary>
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/// 内容大小
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/// </summary>
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public string? ItemSize { get; set; }
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/// <summary>
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/// 间距
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/// </summary>
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public int Gap { get; set; }
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public override bool Layout(object container, LayoutEventArgs layoutEventArgs)
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{
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if (container is StackPanel parent && parent.Controls.Count > 0)
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{
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var controls = new List<Control>(parent.Controls.Count);
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foreach (Control it in parent.Controls)
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{
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if (it.Visible) controls.Insert(0, it);
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}
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if (controls.Count > 0)
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{
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var rect = parent.DisplayRectangle;
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int val = 0;
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if (ItemSize == null || string.IsNullOrEmpty(ItemSize)) val = HandLayout(parent, controls, rect);
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else
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{
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if (ItemSize.EndsWith("%") && float.TryParse(ItemSize.TrimEnd('%'), out var f)) val = HandLayout(parent, controls, rect, (int)Math.Round((Vertical ? rect.Height : rect.Width) * (f / 100F)));
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else if (int.TryParse(ItemSize, out var i)) val = HandLayout(parent, controls, rect, (int)Math.Round(i * Config.Dpi));
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else val = HandLayoutFill(controls, rect);
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}
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if (parent.ScrollBar != null)
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{
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bool old = parent.ScrollBar.Show;
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parent.ScrollBar.SetVrSize(val);
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if (old != parent.ScrollBar.Show) parent.BeginInvoke(new Action(parent.IOnSizeChanged));
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}
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}
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}
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return false;
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}
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int HandLayout(StackPanel parent, List<Control> controls, Rectangle rect)
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{
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int count = controls.Count;
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int offset = 0, use = 0, last_len = 0, gap = 0;
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if (parent.ScrollBar != null) offset = parent.ScrollBar.Value;
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if (Gap > 0 && count > 1) gap = (int)Math.Round(Gap * Config.Dpi);
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if (Vertical)
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{
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foreach (var control in controls)
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{
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var point = rect.Location;
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point.Offset(control.Margin.Left, -offset + control.Margin.Top + use);
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control.Location = point;
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control.Width = rect.Width - control.Margin.Horizontal;
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use += control.Height + gap + control.Margin.Vertical;
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last_len = point.Y + offset + control.Height;
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}
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}
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else
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{
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foreach (var control in controls)
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{
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Point point = rect.Location;
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point.Offset(-offset + control.Margin.Left + use, control.Margin.Top);
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control.Location = point;
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control.Height = rect.Height - control.Margin.Vertical;
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use += control.Width + gap + control.Margin.Horizontal;
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last_len = control.Left + offset + control.Width;
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}
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}
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return last_len;
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}
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int HandLayout(StackPanel parent, List<Control> controls, Rectangle rect, int size)
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{
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int count = controls.Count;
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int offset = 0, use = 0, last_len = 0, gap = 0;
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if (parent.ScrollBar != null) offset = parent.ScrollBar.Value;
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if (Gap > 0 && count > 1) gap = (int)Math.Round(Gap * Config.Dpi);
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if (Vertical)
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{
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foreach (var control in controls)
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{
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var point = rect.Location;
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point.Offset(control.Margin.Left, -offset + control.Margin.Top + use);
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control.Location = point;
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control.Size = new Size(rect.Width - control.Margin.Horizontal, size);
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use += control.Height + gap + control.Margin.Vertical;
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last_len = point.Y + offset + control.Height;
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}
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}
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else
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{
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foreach (var control in controls)
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{
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Point point = rect.Location;
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point.Offset(-offset + control.Margin.Left + use, control.Margin.Top);
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control.Location = point;
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control.Size = new Size(size, rect.Height - control.Margin.Vertical);
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use += control.Width + gap + control.Margin.Horizontal;
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last_len = control.Left + offset + control.Width;
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}
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}
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return last_len;
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}
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int HandLayoutFill(List<Control> controls, Rectangle rect)
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{
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int count = controls.Count;
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int usex = 0, usey = 0, gap = 0;
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if (Gap > 0 && count > 1) gap = (int)Math.Round(Gap * Config.Dpi);
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if (Vertical)
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{
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int size = (rect.Height - (gap * (count - 1))) / count;
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foreach (var control in controls)
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{
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Point point = rect.Location;
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point.Offset(control.Margin.Left + usex, control.Margin.Top + usey);
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control.Location = point;
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control.Size = new Size(rect.Width - control.Margin.Horizontal, size - control.Margin.Vertical);
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usey += size + gap;
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}
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}
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else
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{
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int size = (rect.Width - (gap * (count - 1))) / count;
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foreach (var control in controls)
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{
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Point point = rect.Location;
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point.Offset(control.Margin.Left + usex, control.Margin.Top + usey);
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control.Location = point;
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control.Size = new Size(size - control.Margin.Horizontal, rect.Height - control.Margin.Vertical);
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usex += size + gap;
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}
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}
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return 0;
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}
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}
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#endregion
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#region 鼠标
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protected override void OnMouseDown(MouseEventArgs e)
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{
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if (ScrollBar != null && ScrollBar.MouseDown(e.Location)) { OnTouchDown(e.X, e.Y); return; }
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base.OnMouseDown(e);
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}
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protected override void OnMouseMove(MouseEventArgs e)
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{
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if (ScrollBar != null && ScrollBar.MouseMove(e.Location) && OnTouchMove(e.X, e.Y)) return;
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base.OnMouseMove(e);
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}
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protected override void OnMouseUp(MouseEventArgs e)
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{
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base.OnMouseUp(e);
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ScrollBar?.MouseUp();
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OnTouchUp();
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}
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protected override void OnMouseLeave(EventArgs e)
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{
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base.OnMouseLeave(e);
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ScrollBar?.Leave();
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}
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protected override void OnLeave(EventArgs e)
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{
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base.OnLeave(e);
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ScrollBar?.Leave();
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}
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protected override void OnMouseWheel(MouseEventArgs e)
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{
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if (ScrollBar != null && ScrollBar.EnabledY) ScrollBar.MouseWheel(e.Delta);
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base.OnMouseWheel(e);
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}
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protected override bool OnTouchScrollX(int value)
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{
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if (ScrollBar != null && ScrollBar.EnabledX) return ScrollBar.MouseWheelX(value);
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return false;
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}
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protected override bool OnTouchScrollY(int value)
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{
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if (ScrollBar != null && ScrollBar.EnabledY) return ScrollBar.MouseWheelY(value);
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return false;
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}
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#endregion
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protected override void Dispose(bool disposing)
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{
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ScrollBar?.Dispose();
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base.Dispose(disposing);
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}
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}
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}
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