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Merge pull request #2989 from L1Q/master

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Add scrollbar fade effect
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Jaex 2017-12-09 23:47:05 +03:00 committed by GitHub
commit eb030318e0
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1 changed files with 77 additions and 7 deletions
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84
ShareX.ScreenCaptureLib/RegionHelpers/ScrollbarManager.cs
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@ -25,6 +25,7 @@ You should have received a copy of the GNU General Public License
using ShareX.HelpersLib;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
@ -32,20 +33,58 @@ namespace ShareX.ScreenCaptureLib
{
internal class ScrollbarManager
{
public bool IsVisible => form.ShapeManager.IsPanning && (IsHorizontalScrollbarVisible || IsVerticalScrollbarVisible);
public bool IsVisible => IsHorizontalScrollbarVisible || IsVerticalScrollbarVisible;
public bool IsHorizontalScrollbarVisible { get; private set; }
public bool IsVerticalScrollbarVisible { get; private set; }
private bool shouldDrawHorizontalScrollbar = true;
private bool shouldDrawVerticalScrollbar = true;
private bool shouldDrawHorizontalScrollbarBefore = true;
private bool shouldDrawVerticalScrollbarBefore = true;
private Stopwatch horizontalScrollbarChangeTime;
private Stopwatch verticalScrollbarChangeTime;
public int Thickness { get; set; } = 10;
public int Margin { get; set; } = 15;
public int Padding { get; set; } = 2;
// timings in milliseconds
public int FadeInTime { get; set; } = 150;
public int FadeOutDelay { get; set; } = 500;
public int FadeOutTime { get; set; } = 150;
private int HorizontalScrollbarOpacityLast = 255;
private int HorizontalScrollbarOpacityCurrent = 255;
private int VerticalScrollbarOpacityLast = 255;
private int VerticalScrollbarOpacityCurrent = 255;
private RegionCaptureForm form;
private Rectangle horizontalTrackRectangle, horizontalThumbRectangle, verticalTrackRectangle, verticalThumbRectangle;
public ScrollbarManager(RegionCaptureForm regionCaptureForm)
{
form = regionCaptureForm;
horizontalScrollbarChangeTime = Stopwatch.StartNew();
verticalScrollbarChangeTime = Stopwatch.StartNew();
if (form.ClientArea.Contains(form.CanvasRectangle))
{
HorizontalScrollbarOpacityLast = 0;
HorizontalScrollbarOpacityCurrent = 0;
VerticalScrollbarOpacityLast = 0;
VerticalScrollbarOpacityCurrent = 0;
}
}
int opacityGain(Stopwatch changeTime)
{
return (int)Math.Min(255.0f, 255.0f * (float)changeTime.ElapsedMilliseconds / Math.Max(0, (float)FadeInTime));
}
int opacityLoss(Stopwatch changeTime)
{
int deltaTime = Math.Max(0, (int)changeTime.ElapsedMilliseconds - FadeOutDelay);
return (int)Math.Min(255.0f, 255.0f * (float)deltaTime / Math.Max(0, (float)FadeOutTime));
}
public void Update()
@ -53,7 +92,21 @@ public void Update()
Rectangle imageRectangleVisible = form.CanvasRectangle;
imageRectangleVisible.Intersect(form.ClientArea);
IsHorizontalScrollbarVisible = form.CanvasRectangle.Left < form.ClientArea.Left || form.CanvasRectangle.Right > form.ClientArea.Right;
shouldDrawHorizontalScrollbar = form.ShapeManager.IsPanning && (form.CanvasRectangle.Left < form.ClientArea.Left || form.CanvasRectangle.Right > form.ClientArea.Right);
if (shouldDrawHorizontalScrollbar ^ shouldDrawHorizontalScrollbarBefore)
{
horizontalScrollbarChangeTime = Stopwatch.StartNew();
HorizontalScrollbarOpacityLast = HorizontalScrollbarOpacityCurrent;
}
shouldDrawHorizontalScrollbarBefore = shouldDrawHorizontalScrollbar;
HorizontalScrollbarOpacityCurrent = shouldDrawHorizontalScrollbar
? HorizontalScrollbarOpacityLast + opacityGain(horizontalScrollbarChangeTime)
: HorizontalScrollbarOpacityLast - opacityLoss(horizontalScrollbarChangeTime);
HorizontalScrollbarOpacityCurrent = Math.Min(255, Math.Max(0, HorizontalScrollbarOpacityCurrent));
IsHorizontalScrollbarVisible = HorizontalScrollbarOpacityCurrent > 0;
if (IsHorizontalScrollbarVisible)
{
@ -71,8 +124,21 @@ public void Update()
new Size(horizontalThumbLength, Thickness));
}
IsVerticalScrollbarVisible = form.CanvasRectangle.Top < form.ClientArea.Top || form.CanvasRectangle.Bottom > form.ClientArea.Bottom;
shouldDrawVerticalScrollbar = form.ShapeManager.IsPanning && (form.CanvasRectangle.Top < form.ClientArea.Top || form.CanvasRectangle.Bottom > form.ClientArea.Bottom);
if (shouldDrawVerticalScrollbar ^ shouldDrawVerticalScrollbarBefore)
{
verticalScrollbarChangeTime = Stopwatch.StartNew();
VerticalScrollbarOpacityLast = VerticalScrollbarOpacityCurrent;
}
shouldDrawVerticalScrollbarBefore = shouldDrawVerticalScrollbar;
VerticalScrollbarOpacityCurrent = shouldDrawVerticalScrollbar
? VerticalScrollbarOpacityLast + opacityGain(verticalScrollbarChangeTime)
: VerticalScrollbarOpacityLast - opacityLoss(verticalScrollbarChangeTime);
VerticalScrollbarOpacityCurrent = Math.Min(255, Math.Max(0, VerticalScrollbarOpacityCurrent));
IsVerticalScrollbarVisible = VerticalScrollbarOpacityCurrent > 0;
if (IsVerticalScrollbarVisible)
{
int verticalTrackLength = form.ClientArea.Height - Margin * 2 - Thickness - Padding * 2;
@ -94,18 +160,22 @@ public void Draw(Graphics g)
{
if (IsVisible)
{
using (Brush trackBrush = new SolidBrush(Color.FromArgb(255, 60, 60, 60)))
using (Brush thumbBrush = new SolidBrush(Color.FromArgb(255, 130, 130, 130)))
if (IsHorizontalScrollbarVisible)
{
if (IsHorizontalScrollbarVisible)
using (Brush trackBrush = new SolidBrush(Color.FromArgb(HorizontalScrollbarOpacityCurrent, 60, 60, 60)))
using (Brush thumbBrush = new SolidBrush(Color.FromArgb(HorizontalScrollbarOpacityCurrent, 130, 130, 130)))
{
g.SmoothingMode = SmoothingMode.HighQuality;
g.DrawCapsule(trackBrush, horizontalTrackRectangle);
g.DrawCapsule(thumbBrush, horizontalThumbRectangle);
g.SmoothingMode = SmoothingMode.None;
}
}
if (IsVerticalScrollbarVisible)
if (IsVerticalScrollbarVisible)
{
using (Brush trackBrush = new SolidBrush(Color.FromArgb(VerticalScrollbarOpacityCurrent, 60, 60, 60)))
using (Brush thumbBrush = new SolidBrush(Color.FromArgb(VerticalScrollbarOpacityCurrent, 130, 130, 130)))
{
g.SmoothingMode = SmoothingMode.HighQuality;
g.DrawCapsule(trackBrush, verticalTrackRectangle);