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//===============================================================
// vCanvasPaneDC - a basic canvas for drawing
//
// Copyright (C) 1995,1996, 1997, 1998 Bruce E. Wampler
//
// This file is part of the V C++ GUI Framework, and is covered
// under the terms of the GNU Library General Public License,
// Version 2. This library has NO WARRANTY. See the source file
// vapp.cxx for more complete information about license terms.
//===============================================================
#include <v/vwin32.h> // for Win 32 stuff
#include <math.h>
#include <v/vcpdc.h>
#include <v/vapp.h> // need access to the app
#include <v/vcanvas.h> // our own canvas widget
//-----------------------------------------------------------------------
//================>>> vCanvasPaneDC::vCanvasPaneDC <<<========================
vCanvasPaneDC::vCanvasPaneDC(vCanvasPane* parentPane) : vWinDC()
{
SysDebug(Constructor,"vCanvasPaneDC::vCanvasPaneDC() constructor\n")
_parentPane = parentPane;
_drawWidget = _parentPane->DrawingWindow(); // drawing to this widget
}
//================>>> vCanvasPaneDC::~vCanvasPaneDC <<<========================
vCanvasPaneDC::~vCanvasPaneDC()
{
SysDebug(Destructor,"vCanvasPaneDC::~vCanvasPaneDC() destructor\n")
}
//=====================>>> vCanvasPaneDC::Clear <<<==========================
void vCanvasPaneDC::Clear(void)
{
GetHDC(); // Get a DC to use
::SetBkColor(_hdc, _canvasBG);
HBRUSH brush = ::CreateSolidBrush(_canvasBG);
RECT rect;
::GetClientRect(_drawWidget, &rect);
::FillRect(_hdc, &rect, brush);
::DeleteObject(brush); // need to free the resource!
ReleaseHDC(); // Release the DC
}
//==================>>> vCanvasPaneDC::ClearRect <<<==========================
void vCanvasPaneDC::ClearRect(int left, int top, int width, int height)
{
// Clear a rectangluar area starting at left,top of width and height
if (height == 0 || width == 0)
return;
GetHDC(); // Get a DC to use
::SetBkColor(_hdc, _canvasBG);
HBRUSH brush = ::CreateSolidBrush(_canvasBG);
RECT rect;
rect.top = top; rect.left = left;
rect.bottom = top+height; rect.right = left + width;
::FillRect(_hdc, &rect, brush);
::DeleteObject(brush); // need to free the resource!
ReleaseHDC(); // Release the DC
}
//================>>> vCanvasPaneDC::SetBackground <<<==========================
void vCanvasPaneDC::SetBackground(VCONST vColor& color)
{
_canvasBG = color.pixel(); // retrieve X pixel value
GetHDC();
::SetBkColor(_hdc, _canvasBG);
ReleaseHDC();
Clear();
_parentPane->Redraw(0,0,0,0);
}
//======================>>> vCanvasPaneDC::SetFont <<<===========================
void vCanvasPaneDC::SetFont(VCONST vFont& vf)
{
// Change the font associated with this window.
_font = vf;
// First, make sure the font is loaded
_parentPane->FontChanged(_font); // We have changed the font,
// so we may need to do some things
}
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