Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/cgradientview.cpp

@@ -0,0 +1,171 @@
+// This file is part of VSTGUI. It is subject to the license terms 
+// in the LICENSE file found in the top-level directory of this
+// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
+
+#include "cgradientview.h"
+#include "cdrawcontext.h"
+#include "cgraphicspath.h"
+
+namespace VSTGUI {
+
+//-----------------------------------------------------------------------------
+CGradientView::CGradientView (const CRect& size)
+: CView (size)
+{
+}
+
+//------------------------------------------------------------------------
+void CGradientView::attributeChanged ()
+{
+	invalid ();
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setGradientStyle (GradientStyle style)
+{
+	if (gradientStyle != style)
+	{
+		gradientStyle = style;
+		attributeChanged ();
+	}
+}
+
+//------------------------------------------------------------------------
+void CGradientView::setGradient (CGradient* newGradient)
+{
+	if (gradient != newGradient)
+	{
+		gradient = newGradient;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setFrameColor (const CColor& newColor)
+{
+	if (newColor != frameColor)
+	{
+		frameColor = newColor;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setGradientAngle (double angle)
+{
+	if (angle != gradientAngle)
+	{
+		gradientAngle = angle;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setRoundRectRadius (CCoord radius)
+{
+	if (radius != roundRectRadius)
+	{
+		roundRectRadius = radius;
+		path = nullptr;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setFrameWidth (CCoord width)
+{
+	if (width != frameWidth)
+	{
+		frameWidth = width;
+		path = nullptr;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setDrawAntialiased (bool state)
+{
+	if (state != drawAntialiased)
+	{
+		drawAntialiased = state;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setRadialCenter (const CPoint& center)
+{
+	if (radialCenter != center)
+	{
+		radialCenter = center;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setRadialRadius (CCoord radius)
+{
+	if (radialRadius != radius)
+	{
+		radialRadius = radius;
+		attributeChanged ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::setViewSize (const CRect& rect, bool invalid)
+{
+	if (rect != getViewSize ())
+	{
+		CView::setViewSize (rect, invalid);
+		path = nullptr;
+	}
+}
+
+//-----------------------------------------------------------------------------
+void CGradientView::draw (CDrawContext* context)
+{
+	auto lineWidth = getFrameWidth ();
+	if (lineWidth < 0.)
+		lineWidth = context->getHairlineSize ();
+	if (path == nullptr)
+	{
+		CRect r = getViewSize ();
+		r.inset (lineWidth / 2., lineWidth / 2.);
+		path = owned (context->createRoundRectGraphicsPath (r, roundRectRadius));
+	}
+	if (path && gradient)
+	{
+		context->setDrawMode (drawAntialiased ? kAntiAliasing : kAliasing);
+
+		if (gradientStyle == kLinearGradient)
+		{
+			CPoint colorStartPoint (0, 0);
+			colorStartPoint.x = getViewSize ().left + getViewSize ().getWidth () / 2 + cos (radians (gradientAngle-90)) * getViewSize ().getWidth () / 2;
+			colorStartPoint.y = getViewSize ().top + getViewSize ().getHeight () / 2 + sin (radians (gradientAngle-90)) * getViewSize ().getHeight () / 2;
+			CPoint colorEndPoint (0, getViewSize ().getHeight ());
+			colorEndPoint.x = getViewSize ().left + getViewSize ().getWidth () / 2 + cos (radians (gradientAngle+90)) * getViewSize ().getWidth () / 2;
+			colorEndPoint.y = getViewSize ().top + getViewSize ().getHeight () / 2 + sin (radians (gradientAngle+90)) * getViewSize ().getHeight () / 2;
+			context->fillLinearGradient (path, *gradient, colorStartPoint, colorEndPoint, false);
+		}
+		else
+		{
+			CPoint center (radialCenter);
+			center.x *= getViewSize ().getWidth ();
+			center.y *= getViewSize ().getHeight ();
+			center.offset (getViewSize ().left, getViewSize ().top);
+			context->fillRadialGradient (path, *gradient, center, radialRadius * std::max (getViewSize ().getWidth (), getViewSize ().getHeight ()));
+		}
+		
+		if (frameColor.alpha != 0 && lineWidth > 0.)
+		{
+			context->setDrawMode (drawAntialiased ? kAntiAliasing : kAliasing);
+			context->setFrameColor (frameColor);
+			context->setLineWidth (lineWidth);
+			context->setLineStyle (kLineSolid);
+			context->drawGraphicsPath (path, CDrawContext::kPathStroked);
+		}
+	}
+}
+
+} // VSTGUI