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E-XD++ GDI VC++ Drawing Example: Draw Animate Line with CBrush

With E-XD++ you can create any custom shape quickly and easily, for example, if you want to create a new custom shape like below, E-XD++ will be the best component to build and Drawing Tool, below is a new link line with animate state:

Introduction This article shows the use of a animate line. The code is encapsulated in a E-XD++ MFC class. The class itself is derived from a CFODrawShape class. The code demonstrates the how perform flicker free drawing. The control works in a similar way to the standard Windows line. The main core of the code is in the drawing routine (OnDraw3d and OnDrawFlat). The public interface to access the class is shown here... void CAnimatedLinkShape::OnDrawFlat(CDC *pDC) { CFOLinkShape::OnDrawFlat(pDC); DoStartTimer(); //FODO:Add your own code below. if (mySeg >= GetPointCount()-1) mySeg = 0; FOPPoint a = GetPointAt(mySeg); FOPPoint b = GetPointAt(mySeg+1); float len = (float)sqrt((b.x-a.x)*(b.x-a.x) + (b.y-a.y)*(b.y-a.y)); float x = (float)b.x; float y = (float)b.y; if (myDist >= len) { mySeg++; myDist = 0; } else if (len >= 1) { x = a.x + (b.x-a.x)*myDist/len; y = a.y + (b.y-a.y)*myDist/len; } FOPRect rc(FOPPoint((int)(x-3), (int)(y-3)), 7); CBrush brush(RGB(255,0,0)); CBrush *pBrush = (CBrush *)pDC->SelectObject(&brush); //FillEllipse(pDC, rc, RGB(255,0,0), RGB(255,0,0), 1); pDC->Ellipse(&rc); pDC->SelectObject(pBrush); brush.DeleteObject(); } void CAnimatedLinkShape::OnDraw3d(CDC *pDC) { CFOLinkShape::OnDraw3d(pDC); DoStartTimer(); //FODO:Add your own code below. if (mySeg >= GetPointCount()-1) mySeg = 0; FOPPoint a = GetPointAt(mySeg); FOPPoint b = GetPointAt(mySeg+1); float len = (float)sqrt((b.x-a.x)*(b.x-a.x) + (b.y-a.y)*(b.y-a.y)); float x = (float)b.x; float y = (float)b.y; if (myDist >= len) { mySeg++; myDist = 0; } else if (len >= 1) { x = a.x + (b.x-a.x)*myDist/len; y = a.y + (b.y-a.y)*myDist/len; } FOPRect rc(FOPPoint((int)(x-3), (int)(y-3)), 7); CBrush brush(RGB(255,0,0)); CBrush *pBrush = (CBrush *)pDC->SelectObject(&brush); //FillEllipse(pDC, rc, RGB(255,0,0), RGB(255,0,0), 1); pDC->Ellipse(&rc); pDC->SelectObject(pBrush); brush.DeleteObject(); } The class is created with the E-XD++ default Create() member. The control can be any shape or size. The example code also shows how to add a client edge to the window.

It is tested on Visual Studio 6.0, Visual Studio.net 2013 and Visual Studio.net 2024.

Downloads
pie_Animate_Line_vc_source_code.rar - Download source VC++ demo Source Code - 20 Kb

Notes: To make this codes works, you must has E-XD++ Enterprise Edition installed. See sample GaugeDemo.