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game/client/game_controls/slideshowpanel.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+//=======================================================================================//
+
+#ifndef SLIDESHOWPANEL_H
+#define SLIDESHOWPANEL_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "vgui_controls/EditablePanel.h"
+#include "vgui_controls/ProgressBar.h"
+#include "vgui_controls/ImagePanel.h"
+
+using namespace vgui;
+
+//-----------------------------------------------------------------------------
+// Purpose: Allows fade from one image to another
+//-----------------------------------------------------------------------------
+class CCrossfadableImagePanel : public EditablePanel
+{
+	DECLARE_CLASS_SIMPLE( CCrossfadableImagePanel, EditablePanel );
+public:
+	CCrossfadableImagePanel( Panel* pParent, const char *pName );
+	~CCrossfadableImagePanel();
+
+	virtual void ApplySettings( KeyValues *pInResourceData );
+	virtual void ApplySchemeSettings( IScheme *pScheme );
+	virtual void PerformLayout();
+
+	// A duplicate of the ImagePanel interface - the only difference being that
+	// here we have blend times for SetImage().
+	void SetImage( IImage *pImage, float flBlendTime = 0.0f );
+	void SetImage( const char *pImageName, float flBlendTime = 0.0f );
+
+	void SetShouldScaleImage( bool bState );
+	void SetScaleAmount( float flScale );
+	void SetDrawColor( Color clrDrawColor );
+
+	IImage *GetImage();
+	const char *GetImageName();
+	void SetFillColor( Color c );
+	float GetScaleAmount();
+	bool GetShouldScaleImage();
+	Color GetFillColor();
+	Color GetDrawColor();
+
+	virtual void InstallMouseHandler( Panel *pHandler );
+
+private:
+	virtual void OnSizeChanged( int nWide, int nTall );
+	virtual void OnTick();
+
+	inline ImagePanel *SrcImg()	{ return m_pImages[  m_iSrcImg ]; }
+	inline ImagePanel *DstImg() { return m_pImages[ !m_iSrcImg ]; }
+
+	void SetupImageBlend( float flBlendTime );
+
+	float			m_flStartBlendTime;	// the gpGlobals->realtime when we started blending
+	float			m_flBlendTime;		// amount of time to blend from one image to the next one
+	float			m_flBlend;			// blend value in [0,1] where 0 maps to the source image, and 1 maps to the dest image
+	bool			m_bBlending;		// are we currently transitioning/blending from one image to another?
+	ImagePanel*		m_pImages[2];
+	int				m_iSrcImg;	// 0 or 1
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: Displays a slideshow of images at a set interval
+//-----------------------------------------------------------------------------
+class CSlideshowPanel : public EditablePanel
+{
+	DECLARE_CLASS_SIMPLE( CSlideshowPanel, EditablePanel );
+public:
+	CSlideshowPanel( Panel *pParent, const char *pName );
+	~CSlideshowPanel();
+
+	// Pass in a vgui-relative path, like "training/screenshots/cp_dustbowl_", and
+	// the slideshow panel will add "0.vmt", "1.vmt" etc. until it can't find anymore images.
+	void FillWithImages( const char *pBasePath );
+
+	void AddImage( const char *pImageName );
+	void AddImage( IImage *pImage );
+
+	void SetInterval( float flInterval );
+	void SetTransitionTime( float flTransitionLength );
+
+	CCrossfadableImagePanel *GetImagePanel()			{ return m_pImagePanel; }
+
+	int GetImageCount() const							{ return m_vecImages.Count(); }
+
+private:
+	virtual void ApplySettings( KeyValues *pInResourceData );
+	virtual void OnSizeChanged( int nWide, int nTall );
+	virtual void OnTick();
+	void UpdateNextTransitionTime();
+
+	CCrossfadableImagePanel		*m_pImagePanel;
+	CUtlVector< IImage * >		m_vecImages;
+	float						m_flNextTransitionTime;	// gpGlobals->realtime of time when we should transition next
+	float						m_flInterval;			// Amount of time between blend begins to next image, in seconds
+	float						m_flTransitionLength;	// Length of each transition
+	int							m_iCurImg;				// Current image index
+};
+
+#endif // SLIDESHOWPANEL_H