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Refactor ScrollbarManager class
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@ -37,36 +37,34 @@ internal class ScrollbarManager
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public bool IsHorizontalScrollbarVisible { get; private set; }
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public bool IsVerticalScrollbarVisible { get; private set; }
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private bool shouldDrawHorizontalScrollbar = true;
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private bool shouldDrawVerticalScrollbar = true;
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private bool shouldDrawHorizontalScrollbarBefore = true;
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private bool shouldDrawVerticalScrollbarBefore = true;
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private Stopwatch horizontalScrollbarChangeTime;
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private Stopwatch verticalScrollbarChangeTime;
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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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// timings in milliseconds
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// Timings in milliseconds
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public int FadeInTime { get; set; } = 150;
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public int FadeOutDelay { get; set; } = 500;
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public int FadeOutTime { get; set; } = 150;
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private RegionCaptureForm form;
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private Rectangle horizontalTrackRectangle, horizontalThumbRectangle, verticalTrackRectangle, verticalThumbRectangle;
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private bool shouldDrawHorizontalScrollbar = true;
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private bool shouldDrawVerticalScrollbar = true;
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private bool shouldDrawHorizontalScrollbarBefore = true;
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private bool shouldDrawVerticalScrollbarBefore = true;
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private Stopwatch horizontalScrollbarChangeTime;
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private Stopwatch verticalScrollbarChangeTime;
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private int HorizontalScrollbarOpacityLast = 255;
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private int HorizontalScrollbarOpacityCurrent = 255;
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private int VerticalScrollbarOpacityLast = 255;
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private int VerticalScrollbarOpacityCurrent = 255;
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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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horizontalScrollbarChangeTime = Stopwatch.StartNew();
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verticalScrollbarChangeTime = Stopwatch.StartNew();
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if (form.ClientArea.Contains(form.CanvasRectangle))
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{
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HorizontalScrollbarOpacityLast = 0;
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@ -76,35 +74,30 @@ public ScrollbarManager(RegionCaptureForm regionCaptureForm)
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}
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}
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int opacityGain(Stopwatch changeTime)
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{
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return (int)Math.Min(255.0f, 255.0f * (float)changeTime.ElapsedMilliseconds / Math.Max(0, (float)FadeInTime));
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}
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int opacityLoss(Stopwatch changeTime)
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{
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int deltaTime = Math.Max(0, (int)changeTime.ElapsedMilliseconds - FadeOutDelay);
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return (int)Math.Min(255.0f, 255.0f * (float)deltaTime / Math.Max(0, (float)FadeOutTime));
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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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shouldDrawHorizontalScrollbar = form.ShapeManager.IsPanning && (form.CanvasRectangle.Left < form.ClientArea.Left || form.CanvasRectangle.Right > form.ClientArea.Right);
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shouldDrawHorizontalScrollbar = form.ShapeManager.IsPanning &&
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(form.CanvasRectangle.Left < form.ClientArea.Left || form.CanvasRectangle.Right > form.ClientArea.Right);
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if (shouldDrawHorizontalScrollbar ^ shouldDrawHorizontalScrollbarBefore)
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if (shouldDrawHorizontalScrollbar != shouldDrawHorizontalScrollbarBefore)
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{
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horizontalScrollbarChangeTime = Stopwatch.StartNew();
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HorizontalScrollbarOpacityLast = HorizontalScrollbarOpacityCurrent;
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}
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shouldDrawHorizontalScrollbarBefore = shouldDrawHorizontalScrollbar;
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HorizontalScrollbarOpacityCurrent = shouldDrawHorizontalScrollbar
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? HorizontalScrollbarOpacityLast + opacityGain(horizontalScrollbarChangeTime)
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: HorizontalScrollbarOpacityLast - opacityLoss(horizontalScrollbarChangeTime);
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HorizontalScrollbarOpacityCurrent = Math.Min(255, Math.Max(0, HorizontalScrollbarOpacityCurrent));
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if (shouldDrawHorizontalScrollbar)
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{
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HorizontalScrollbarOpacityCurrent = HorizontalScrollbarOpacityLast + OpacityGain(horizontalScrollbarChangeTime);
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}
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else
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{
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HorizontalScrollbarOpacityCurrent = HorizontalScrollbarOpacityLast - OpacityLoss(horizontalScrollbarChangeTime);
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}
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HorizontalScrollbarOpacityCurrent = HorizontalScrollbarOpacityCurrent.Between(0, 255);
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IsHorizontalScrollbarVisible = HorizontalScrollbarOpacityCurrent > 0;
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@ -124,19 +117,25 @@ public void Update()
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new Size(horizontalThumbLength, Thickness));
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}
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shouldDrawVerticalScrollbar = form.ShapeManager.IsPanning && (form.CanvasRectangle.Top < form.ClientArea.Top || form.CanvasRectangle.Bottom > form.ClientArea.Bottom);
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shouldDrawVerticalScrollbar = form.ShapeManager.IsPanning &&
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(form.CanvasRectangle.Top < form.ClientArea.Top || form.CanvasRectangle.Bottom > form.ClientArea.Bottom);
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if (shouldDrawVerticalScrollbar ^ shouldDrawVerticalScrollbarBefore)
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if (shouldDrawVerticalScrollbar != shouldDrawVerticalScrollbarBefore)
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{
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verticalScrollbarChangeTime = Stopwatch.StartNew();
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VerticalScrollbarOpacityLast = VerticalScrollbarOpacityCurrent;
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}
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shouldDrawVerticalScrollbarBefore = shouldDrawVerticalScrollbar;
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VerticalScrollbarOpacityCurrent = shouldDrawVerticalScrollbar
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? VerticalScrollbarOpacityLast + opacityGain(verticalScrollbarChangeTime)
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: VerticalScrollbarOpacityLast - opacityLoss(verticalScrollbarChangeTime);
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VerticalScrollbarOpacityCurrent = Math.Min(255, Math.Max(0, VerticalScrollbarOpacityCurrent));
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if (shouldDrawVerticalScrollbar)
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{
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VerticalScrollbarOpacityCurrent = VerticalScrollbarOpacityLast + OpacityGain(verticalScrollbarChangeTime);
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}
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else
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{
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VerticalScrollbarOpacityCurrent = VerticalScrollbarOpacityLast - OpacityLoss(verticalScrollbarChangeTime);
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}
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VerticalScrollbarOpacityCurrent = VerticalScrollbarOpacityCurrent.Between(0, 255);
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IsVerticalScrollbarVisible = VerticalScrollbarOpacityCurrent > 0;
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if (IsVerticalScrollbarVisible)
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@ -185,5 +184,16 @@ public void Draw(Graphics g)
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}
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}
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}
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private int OpacityGain(Stopwatch changeTime)
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{
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return (int)Math.Min(255.0f, 255.0f * changeTime.ElapsedMilliseconds / Math.Max(0, (float)FadeInTime));
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}
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private int OpacityLoss(Stopwatch changeTime)
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{
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int deltaTime = Math.Max(0, (int)changeTime.ElapsedMilliseconds - FadeOutDelay);
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return (int)Math.Min(255.0f, 255.0f * deltaTime / Math.Max(0, (float)FadeOutTime));
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}
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}
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}
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