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119 lines
No EOL
5.7 KiB
C#
119 lines
No EOL
5.7 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (c) 2007-2017 ShareX Team
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using ShareX.HelpersLib;
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using System;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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namespace ShareX.ScreenCaptureLib
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{
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internal class ScrollbarManager
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{
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public bool IsVisible => form.ShapeManager.IsPanning && (IsHorizontalScrollbarVisible || IsVerticalScrollbarVisible);
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public bool IsHorizontalScrollbarVisible { get; private set; }
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public bool IsVerticalScrollbarVisible { get; private set; }
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public int Thickness { get; set; } = 10;
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public int Margin { get; set; } = 15;
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public int Padding { get; set; } = 2;
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private RegionCaptureForm form;
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private Rectangle horizontalTrackRectangle, horizontalThumbRectangle, verticalTrackRectangle, verticalThumbRectangle;
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public ScrollbarManager(RegionCaptureForm regionCaptureForm)
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{
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form = regionCaptureForm;
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}
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public void Update()
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{
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Rectangle imageRectangleVisible = form.CanvasRectangle;
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imageRectangleVisible.Intersect(form.ClientArea);
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IsHorizontalScrollbarVisible = form.CanvasRectangle.Left < form.ClientArea.Left || form.CanvasRectangle.Right > form.ClientArea.Right;
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if (IsHorizontalScrollbarVisible)
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{
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int horizontalTrackLength = form.ClientArea.Width - Margin * 2 - Thickness - Padding * 2;
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int horizontalThumbLength = Math.Max(Thickness, (int)Math.Round((float)imageRectangleVisible.Width / form.CanvasRectangle.Width * horizontalTrackLength));
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horizontalTrackRectangle = new Rectangle(new Point(Margin - Padding, form.ClientArea.Bottom - (Thickness + Margin) - Padding),
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new Size(horizontalTrackLength + Padding * 2, Thickness + Padding * 2));
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double limitHorizontal = (horizontalTrackLength - horizontalThumbLength) / 2.0f;
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double thumbHorizontalPositionX = Math.Round(horizontalTrackRectangle.X + horizontalTrackRectangle.Width / 2.0f - (horizontalThumbLength / 2.0f) -
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Math.Min(limitHorizontal, Math.Max(-limitHorizontal, form.CanvasCenterOffset.X / form.CanvasRectangle.Width * horizontalTrackLength)));
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horizontalThumbRectangle = new Rectangle(new Point((int)thumbHorizontalPositionX, form.ClientArea.Bottom - (Thickness + Margin)),
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new Size(horizontalThumbLength, Thickness));
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}
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IsVerticalScrollbarVisible = form.CanvasRectangle.Top < form.ClientArea.Top || form.CanvasRectangle.Bottom > form.ClientArea.Bottom;
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if (IsVerticalScrollbarVisible)
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{
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int verticalTrackLength = form.ClientArea.Height - Margin * 2 - Thickness - Padding * 2;
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int verticalThumbLength = Math.Max(Thickness, (int)Math.Round((float)imageRectangleVisible.Height / form.CanvasRectangle.Height * verticalTrackLength));
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verticalTrackRectangle = new Rectangle(new Point(form.ClientArea.Right - (Thickness + Margin) - Padding, Margin - Padding),
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new Size(Thickness + Padding * 2, verticalTrackLength + Padding * 2));
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double limitVertical = (verticalTrackLength - verticalThumbLength) / 2.0f;
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double thumbVerticalPositionY = Math.Round(verticalTrackRectangle.Y + verticalTrackRectangle.Height / 2.0f - (verticalThumbLength / 2.0f) -
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Math.Min(limitVertical, Math.Max(-limitVertical, form.CanvasCenterOffset.Y / form.CanvasRectangle.Height * verticalTrackLength)));
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verticalThumbRectangle = new Rectangle(new Point(form.ClientArea.Right - (Thickness + Margin), (int)thumbVerticalPositionY),
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new Size(Thickness, verticalThumbLength));
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}
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}
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public void Draw(Graphics g)
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{
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if (IsVisible)
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{
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using (Brush trackBrush = new SolidBrush(Color.FromArgb(255, 60, 60, 60)))
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using (Brush thumbBrush = new SolidBrush(Color.FromArgb(255, 130, 130, 130)))
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{
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if (IsHorizontalScrollbarVisible)
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{
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g.SmoothingMode = SmoothingMode.HighQuality;
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g.DrawCapsule(trackBrush, horizontalTrackRectangle);
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g.DrawCapsule(thumbBrush, horizontalThumbRectangle);
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g.SmoothingMode = SmoothingMode.None;
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}
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if (IsVerticalScrollbarVisible)
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{
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g.SmoothingMode = SmoothingMode.HighQuality;
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g.DrawCapsule(trackBrush, verticalTrackRectangle);
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g.DrawCapsule(thumbBrush, verticalThumbRectangle);
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g.SmoothingMode = SmoothingMode.None;
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}
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}
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}
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}
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}
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} |