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Subject:
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Can someone help me wif CBrush and CPen
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Posted By:
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conny
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Post Date:
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4/5/2005 4:38:06 AM
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I've declared and created the brush and pen of bright color, but when i draw the line, it's still in black. Is there any problem with the codes? thanx alot.
if (m_Drag && PointOrigin!=point) // for mouse drag check
{
// Graphics
CClientDC ClientDC(this);
ClientDC.SetROP2(R2_NOT);
CPen SolidPen (PS_SOLID, 1, RGB(0,255,255));
CPen *OldPen;
OldPen = ClientDC.SelectObject(&SolidPen);
//Declare and create the brush
CBrush newBrush;
newBrush.CreateSolidBrush( RGB(0, 255, 255));
CBrush *pBrushSv = ClientDC.SelectObject( &newBrush);
//Arrow
if (MotionFix && dline==1)
DrawLine(&ClientDC,PointOrigin,PointOld);
//check if "line" radio button clicked
if(dline==1)
{
MotionFix=1;
// MotionFix is used to prevent redrawing
DrawLine(&ClientDC,PointOrigin,point);
}
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Reply By:
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CharlieChan
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Reply Date:
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6/22/2005 7:20:35 PM
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Here is what Ivor Horton did in Beginnig Visual C++ 6 to draw a line. This is from chapter 16. I don't know if it will help.
// Implementations of the element classes
#include "stdafx.h"
#include <math.h>
#include "OurConstants.h"
#include "Elements.h"
// CLine class constructor
CLine::CLine(const CPoint& Start, const CPoint& End, const COLORREF& Color)
{
m_StartPoint = Start; // Set line start point
m_EndPoint = End; // Set line end point
m_Color = Color; // Set line color
m_Pen = 1; // Set pen width
// Define the enclosing rectangle
m_EnclosingRect = CRect(Start, End);
m_EnclosingRect.NormalizeRect();
}
void CLine::Draw(CDC* pDC, const CElement* pElement) const
{
// Create a pen for this object and
// initialize it to the object color and line width
CPen aPen;
COLORREF aColor = m_Color; // Initialize with element color
if (this == pElement) // This element selected?
aColor = SELECT_COLOR; // Set highlight color
if (!aPen.CreatePen(PS_SOLID, m_Pen, aColor))
{
// Pen creation failed. Abort the program
AfxMessageBox("Pen creation failed drawing a line", MB_OK);
AfxAbort();
}
CPen* pOldPen = pDC->SelectObject(&aPen); // Select the pen
// Now draw the line
pDC->MoveTo(m_StartPoint);
pDC->LineTo(m_EndPoint);
pDC->SelectObject(pOldPen); // Restore the old pen
}
// Get the bounding rectangle for an element
CRect CElement::GetBoundRect() const
{
CRect BoundingRect; // Object to store bounding rectangle
BoundingRect = m_EnclosingRect; // Store the enclosing rectangle
// Increase the rectangle by the pen width
BoundingRect.InflateRect(m_Pen, m_Pen);
return BoundingRect; // Return the bounding rectangle
}
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Reply By:
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vigorous365
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Reply Date:
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8/16/2005 2:26:33 AM
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Oh ,there is a small mistake in your code.Please remove the code" ClientDC.SetROP2(R2_NOT);"Because the code regulate that the current color is contray to the color of screen.
Redfox
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