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vgui2/vgui_controls/ImageList.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include <vgui/VGUI.h>
+#include <Color.h>
+
+#include <vgui_controls/ImageList.h>
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include <tier0/memdbgon.h>
+
+using namespace vgui;
+
+//-----------------------------------------------------------------------------
+// Purpose: blank image, intentially draws nothing
+//-----------------------------------------------------------------------------
+class BlankImage : public IImage
+{
+public:
+	virtual void Paint() {}
+	virtual void SetPos(int x, int y) {}
+	virtual void GetContentSize(int &wide, int &tall) { wide = 0; tall = 0; }
+	virtual void GetSize(int &wide, int &tall) { wide = 0; tall = 0; }
+	virtual void SetSize(int wide, int tall) {}
+	virtual void SetColor(Color col) {}
+	virtual bool Evict() { return false; }
+	virtual int GetNumFrames() { return 0; }
+	virtual void SetFrame( int nFrame ) {}
+	virtual HTexture GetID() { return 0; }
+	virtual void SetRotation( int iRotation ) { return; };
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: Constructor
+//-----------------------------------------------------------------------------
+ImageList::ImageList(bool deleteImagesWhenDone)
+{
+	m_bDeleteImagesWhenDone = deleteImagesWhenDone;
+	AddImage(new BlankImage());
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Destructor
+//-----------------------------------------------------------------------------
+ImageList::~ImageList()
+{
+	if (m_bDeleteImagesWhenDone)
+	{
+		// delete all the images, except for the first image (which is always the blank image)
+		for (int i = 1; i < m_Images.Count(); i++)
+		{
+			delete m_Images[i];
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: adds a new image to the list, returning the index it was placed at
+//-----------------------------------------------------------------------------
+int ImageList::AddImage(vgui::IImage *image)
+{
+	return m_Images.AddToTail(image);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: sets an image at a specified index, growing and adding NULL images if necessary
+//-----------------------------------------------------------------------------
+void ImageList::SetImageAtIndex(int index, vgui::IImage *image)
+{
+	// allocate more images if necessary
+	while (m_Images.Count() <= index)
+	{
+		m_Images.AddToTail(NULL);
+	}
+
+	m_Images[index] = image;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: returns the number of images
+//-----------------------------------------------------------------------------
+int ImageList::GetImageCount()
+{
+	return m_Images.Count();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: gets an image, imageIndex is of range [0, GetImageCount)
+//-----------------------------------------------------------------------------
+vgui::IImage *ImageList::GetImage(int imageIndex)
+{
+	return m_Images[imageIndex];
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: returns true if an index is valid
+//-----------------------------------------------------------------------------
+bool ImageList::IsValidIndex(int imageIndex)
+{
+	return m_Images.IsValidIndex(imageIndex);
+}
+