mirror of
https://github.com/ShareX/ShareX.git
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207 lines
No EOL
8.1 KiB
C#
207 lines
No EOL
8.1 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) 2007-2022 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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using System.Windows.Forms;
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namespace ShareX.ScreenCaptureLib
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{
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internal class ImageEditorScrollbar : ImageEditorControl
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{
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public Orientation Orientation { get; set; }
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public int Thickness { get; set; } = 15;
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public int Margin { get; set; } = 5;
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public int Padding { get; set; } = 1;
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public bool IsCapsule { get; set; } = true;
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public Color TrackColor { get; set; } = Color.FromArgb(49, 54, 66);
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public Color ThumbColor { get; set; } = Color.FromArgb(90, 94, 104);
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public Color ActiveThumbColor { get; set; } = Color.FromArgb(111, 115, 123);
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public bool AutoHide { get; set; } = true;
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public RectangleF ThumbRectangle { get; private set; }
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private RegionCaptureForm form;
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public ImageEditorScrollbar(Orientation orientation, RegionCaptureForm form)
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{
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Orientation = orientation;
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this.form = form;
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}
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public void Update()
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{
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if (AutoHide)
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{
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RectangleF imageRectangle = form.CanvasRectangle.Scale(form.ZoomFactor);
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bool isScrollbarNeeded;
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if (Orientation == Orientation.Horizontal)
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{
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isScrollbarNeeded = imageRectangle.Left < form.ClientArea.Left ||
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(imageRectangle.Right * form.ZoomFactor) > form.ClientArea.Right;
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}
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else
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{
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isScrollbarNeeded = imageRectangle.Top < form.ClientArea.Top ||
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(imageRectangle.Bottom * form.ZoomFactor) > form.ClientArea.Bottom;
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}
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Visible = isScrollbarNeeded || IsDragging;
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}
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else
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{
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Visible = true;
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}
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if (Visible)
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{
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if (IsDragging)
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{
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Scroll(form.ShapeManager.InputManager.ClientMousePosition);
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}
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RectangleF imageRectangle = form.CanvasRectangle.Scale(form.ZoomFactor);
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RectangleF imageRectangleVisible = imageRectangle;
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imageRectangleVisible.Intersect(form.ClientArea);
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float inClientAreaSize, inImageVisibleSize, inImageSize, sideOffsetBase;
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float inCanvasCenterOffset;
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if (Orientation == Orientation.Horizontal)
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{
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inClientAreaSize = form.ClientArea.Width;
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inImageVisibleSize = imageRectangleVisible.Width;
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inImageSize = imageRectangle.Width;
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sideOffsetBase = form.ClientArea.Bottom;
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inCanvasCenterOffset = form.CanvasCenterOffset.X;
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}
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else
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{
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inClientAreaSize = form.ClientArea.Height;
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inImageVisibleSize = imageRectangleVisible.Height;
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inImageSize = imageRectangle.Height;
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sideOffsetBase = form.ClientArea.Right;
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inCanvasCenterOffset = form.CanvasCenterOffset.Y;
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}
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float trackLength = inClientAreaSize - (Margin * 2) - (Padding * 2) - Thickness;
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float trackLengthInternal = trackLength - (Padding * 2);
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int thumbLength = Math.Max(Thickness, (int)Math.Round((float)inImageVisibleSize / inImageSize * trackLengthInternal));
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double thumbLimit = (trackLengthInternal - thumbLength) / 2.0f;
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int thumbPosition = (int)Math.Round(Margin + (trackLength / 2.0f) - (thumbLength / 2.0f) -
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Math.Min(thumbLimit, Math.Max(-thumbLimit, inCanvasCenterOffset / inImageSize * trackLengthInternal)));
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int trackWidth = (Padding * 2) + Thickness;
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float thumbSideOffset = sideOffsetBase - Margin - Padding - Thickness;
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float trackSideOffset = thumbSideOffset - Padding;
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if (Orientation == Orientation.Horizontal)
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{
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Rectangle = new RectangleF(Margin, trackSideOffset, trackLength, trackWidth);
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ThumbRectangle = new RectangleF(thumbPosition, thumbSideOffset, thumbLength, Thickness);
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}
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else
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{
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Rectangle = new RectangleF(trackSideOffset, Margin, trackWidth, trackLength);
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ThumbRectangle = new RectangleF(thumbSideOffset, thumbPosition, Thickness, thumbLength);
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}
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}
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}
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public override void OnDraw(Graphics g)
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{
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Color thumbColor;
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if (IsDragging || form.ShapeManager.IsPanning || IsCursorHover)
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{
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thumbColor = ActiveThumbColor;
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}
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else
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{
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thumbColor = ThumbColor;
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}
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using (Brush trackBrush = new SolidBrush(TrackColor))
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using (Brush thumbBrush = new SolidBrush(thumbColor))
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{
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Matrix savedTransform = g.Transform;
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form.ZoomTransform(g, true);
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if (IsCapsule)
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{
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g.SmoothingMode = SmoothingMode.HighQuality;
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g.PixelOffsetMode = PixelOffsetMode.Half;
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g.DrawCapsule(trackBrush, Rectangle);
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g.DrawCapsule(thumbBrush, ThumbRectangle);
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g.SmoothingMode = SmoothingMode.None;
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g.PixelOffsetMode = PixelOffsetMode.Default;
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}
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else
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{
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g.FillRectangle(trackBrush, Rectangle);
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g.FillRectangle(thumbBrush, ThumbRectangle);
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}
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g.Transform = savedTransform;
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}
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}
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private void Scroll(Point position)
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{
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RectangleF imageRectangle = form.CanvasRectangle.Scale(form.ZoomFactor);
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float inMousePosition, inClientAreaSize, inImageSize;
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if (Orientation == Orientation.Horizontal)
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{
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inMousePosition = position.X;
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inClientAreaSize = form.ClientArea.Width;
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inImageSize = imageRectangle.Width;
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}
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else
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{
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inMousePosition = position.Y;
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inClientAreaSize = form.ClientArea.Height;
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inImageSize = imageRectangle.Height;
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}
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float mousePositionLocal = inMousePosition - Margin - Padding;
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float trackLength = inClientAreaSize - (Margin * 2) - (Padding * 2) - Thickness;
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float trackLengthInternal = trackLength - (Padding * 2);
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float centerOffsetNew = ((trackLengthInternal / 2.0f) - mousePositionLocal) / trackLengthInternal * inImageSize;
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Vector2 canvasCenterOffset = Orientation == Orientation.Horizontal ?
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new Vector2(centerOffsetNew, form.CanvasCenterOffset.Y) :
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new Vector2(form.CanvasCenterOffset.X, centerOffsetNew);
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form.PanToOffset(canvasCenterOffset);
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}
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}
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} |