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Enhanced Progress Bar Control

, 11 Jun 2002
An enhanced progress control that supports gradient shading, formatted text, animation, tooltips, shape, 'snake' and reverse modes, and vertical modes
progressctrlx_demo.zip
ProgressBarTest
res
ProgressBarTest.dsp
Release
ProgressBarTest.exe
ProgressBarTest.dsw
pattern.bmp
ShapeHorz.bmp
ShapeVert.bmp
ProgressBarTest.ico
progressctrlx_src.zip
#if !defined(AFX_GRADIENT_H__2FB4902E_E00C_4892_AA03_60779F349F58__INCLUDED_)
#define AFX_GRADIENT_H__2FB4902E_E00C_4892_AA03_60779F349F58__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

///////////////////////////////////////////////////////////////////////////////
// class CGradient
//
// Author:  Yury Goltsman
// email:   ygprg@go.to
// page:    http://go.to/ygprg
// Copyright � 2000, Yury Goltsman
//
// This code provided "AS IS," without warranty of any kind.
// You may freely use or modify this code provided this
// Copyright is included in all derived versions.
//
// version : 1.1
// Gradient shift added
// Linear Gradient stretch factor
// Per color gradient stretch factor
//
// version : 1.0
// This code is part of CProgressCtrlX and
//   specially oriented for gradient drawing
// Added palette support for 256 colors mode
// Fully rewritten to be more extensible
//

#include <afxtempl.h>

#ifndef UIBITS_API
	#ifdef UIBITS_DLL
		#define  UIBITS_API __declspec(dllexport)
	#else
		#define  UIBITS_API __declspec(dllimport)
	#endif
#endif

struct CGradElement
{
	CGradElement(COLORREF color = 0, int length = 0){this->color = color; this->length = length;}
	COLORREF color;
	int length;
};

typedef CArray<CGradElement, CGradElement&>	CGradArray;

class /*UIBITS_API*/ CGradient  
{
// Construction
public:
	CGradient();
	virtual ~CGradient();

// Attributes
public:
// linear gradient attributes
	enum eDirection{LTR, RTL, TTB, BTT};
	void SetDirection(eDirection fDirection){if(m_fDirection != fDirection){m_fDirection = fDirection;}}
	eDirection GetDirection() {return m_fDirection;}
	void SetStretchGradient(float flStretchFactor = 1); // useful for animation
	float GetStretchGradient() {return m_flStretchGrad;}
// linear gradient operations
	virtual void DrawLinearGradient(CDC *pDC, CRect rcGrad, int nClipStart = 0, int nClipEnd = -1, int nShift = 0);

// attributes
	void SetGradientColors(COLORREF clrStart, COLORREF clrEnd) { SetGradientColorsX(2, clrStart, clrEnd);}
	void GetGradientColors(COLORREF& clrStart, COLORREF& clrEnd); 

	void SetGradientColorsX(int nCount, COLORREF clrFirst, COLORREF clrNext, ...);
	const CDWordArray& GetGradientColorsX() { return m_ardwGradColors; }
	void AddColor(COLORREF clr);
	void SetColorsStretch(double flFirst, ...); // in percent, num of arguments should be one less then num of colors

	void SetCreatePalette(BOOL fCreate = TRUE) {m_fCreatePalette = fCreate;}
	BOOL GetCreatePalette() { return m_fCreatePalette;}
	CPalette& GetPalette() {CreatePalette(); return m_Pal;}

// operations
	virtual void CalcShiftedGradient(CGradArray& arElements, int nShift, int nGradWidth, int nClipStart = 0, int nClipEnd = -1, UINT nMaxColors = (UINT)-1);
	virtual void CalcMultiGradient(CGradArray& arElements, int nGradWidth, int nClipStart = 0, int nClipEnd = -1, UINT nMaxColors = (UINT)-1);
	virtual void CalcGradient(CGradArray& arElements, COLORREF clrStart, COLORREF clrEnd, int nGradWidth, int nClipStart = 0, int nClipEnd = -1, UINT nMaxColors = (UINT)-1);
protected:
	void CreatePalette();
	void NormalizeColorsStretch();

	// color atributes
	CDWordArray m_ardwGradColors;
	BOOL m_fCreatePalette;
	CPalette m_Pal;
private:
	CArray<double, double&> m_arflGradStretch;
protected:
	// linear gradient
	eDirection m_fDirection;
	CRect ConvertToReal(CRect rcDraw, int nBandStart, int nBandEnd);
	float m_flStretchGrad;
};

#endif // !defined(AFX_GRADIENT_H__2FB4902E_E00C_4892_AA03_60779F349F58__INCLUDED_)

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Yury Goltsman
Software Developer (Senior)
Israel Israel
Yury is Software Engineer since 1988.
His programming experience includes C#/VB.NET, WPF, C/C++(MFC/STL), Borland Delphi & C++ (VCL), JavaScript, HTML, CSS, XML, SQL, VB6, DirectX, Flash.
He has worked on PCs (DOS/Win3.1-Vista) and PocketPCs (WinCE).
 
Yury was born in Ukraine, but currently based in Jerusalem.

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