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// DasherView.cpp
//
// Copyright (c) 2008 The Dasher Team
//
// This file is part of Dasher.
//
// Dasher is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// Dasher is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Dasher; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include "../Common/Common.h"
#include "DasherInput.h"
#include "DasherView.h"
using namespace Dasher;
using std::vector;
// Track memory leaks on Windows to the line that new'd the memory
#ifdef _WIN32
#ifdef _DEBUG_MEMLEAKS
#define DEBUG_NEW new( _NORMAL_BLOCK, THIS_FILE, __LINE__ )
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#endif
/////////////////////////////////////////////////////////////////////////////
CDasherView::CDasherView(CDasherScreen *DasherScreen, Opts::ScreenOrientations orient)
: m_pScreen(DasherScreen), m_Orientation(orient) {
}
/////////////////////////////////////////////////////////////////////////////
void CDasherView::ChangeScreen(CDasherScreen *NewScreen) {
m_pScreen = NewScreen;
}
/////////////////////////////////////////////////////////////////////////////
void CDasherView::DasherSpaceLine(myint x1, myint y1, myint x2, myint y2, int iWidth, int iColor) {
if (!ClipLineToVisible(x1, y1, x2, y2)) return;
vector<CDasherScreen::point> vPoints;
CDasherScreen::point p;
Dasher2Screen(x1, y1, p.x, p.y);
vPoints.push_back(p);
DasherLine2Screen(x1,y1,x2,y2,vPoints);
CDasherScreen::point *pts = new CDasherScreen::point[vPoints.size()];
for (int i = vPoints.size(); i-->0; ) pts[i] = vPoints[i];
Screen()->Polyline(pts, vPoints.size(), iWidth, iColor);
}
bool CDasherView::ClipLineToVisible(myint &x1, myint &y1, myint &x2, myint &y2) {
if (x1 > x2) return ClipLineToVisible(x2,y2,x1,y1);
//ok. have x1 <= x2...
myint iDasherMinX, iDasherMinY, iDasherMaxX, iDasherMaxY;
VisibleRegion(iDasherMinX, iDasherMinY, iDasherMaxX, iDasherMaxY);
if (x1 > iDasherMaxX) {
DASHER_ASSERT(x2>iDasherMaxX);
return false; //entirely offscreen!
}
if (x2 < iDasherMinX) {
DASHER_ASSERT(x1<iDasherMinX);
return false;
}
if (x1 < iDasherMinX) {
y1 = y2+((y1-y2)*(iDasherMinX-x2)/(x1 - x2));
x1 = iDasherMinX;
}
if (x2 > iDasherMaxX) {
y2 = y1 + (y2-y1)*(iDasherMaxX-x1)/(x2-x1);
x2 = iDasherMaxX;
}
if (y1 < iDasherMinY && y2 < iDasherMinY) return false;
if (y1 > iDasherMaxY && y2 > iDasherMaxY) return false;
for (int i=0; i<2; i++) {
myint &y(i ? y2 : y1), &oy(i ? y1 : y2);
myint &x(i ? x2 : x1), &ox(i ? x1 : x2);
if (y<iDasherMinY) {
x = ox- (ox-x)*(oy-iDasherMinY)/(oy-y);
y = iDasherMinY;
} else if (y>iDasherMaxY) {
x = ox-(ox-x)*(oy-iDasherMaxY)/(oy-y);
y = iDasherMaxY;
}
}
return true;
}
/// Draw a polyline specified in Dasher co-ordinates
void CDasherView::DasherPolyline(myint *x, myint *y, int n, int iWidth, int iColour) {
CDasherScreen::point * ScreenPoints = new CDasherScreen::point[n];
for(int i(0); i < n; ++i)
Dasher2Screen(x[i], y[i], ScreenPoints[i].x, ScreenPoints[i].y);
if(iColour != -1) {
Screen()->Polyline(ScreenPoints, n, iWidth, iColour);
}
else {
Screen()->Polyline(ScreenPoints, n, iWidth,0);//no color given
}
delete[]ScreenPoints;
}
// Draw a polyline with an arrow on the end
void CDasherView::DasherPolyarrow(myint *x, myint *y, int n, int iWidth, int iColour, double dArrowSizeFactor) {
CDasherScreen::point * ScreenPoints = new CDasherScreen::point[n+3];
for(int i(0); i < n; ++i)
Dasher2Screen(x[i], y[i], ScreenPoints[i].x, ScreenPoints[i].y);
int iXvec = (int)((ScreenPoints[n-2].x - ScreenPoints[n-1].x)*dArrowSizeFactor);
int iYvec = (int)((ScreenPoints[n-2].y - ScreenPoints[n-1].y)*dArrowSizeFactor);
ScreenPoints[n].x = ScreenPoints[n-1].x + iXvec + iYvec;
ScreenPoints[n].y = ScreenPoints[n-1].y - iXvec + iYvec;
ScreenPoints[n+1].x = ScreenPoints[n-1].x ;
ScreenPoints[n+1].y = ScreenPoints[n-1].y ;
ScreenPoints[n+2].x = ScreenPoints[n-1].x + iXvec - iYvec;
ScreenPoints[n+2].y = ScreenPoints[n-1].y + iXvec + iYvec;
Screen()->Polyline(ScreenPoints, n+3, iWidth, (iColour==-1) ? 0 : iColour);
delete[]ScreenPoints;
}
// Draw a box specified in Dasher co-ordinates
void CDasherView::DasherDrawRectangle(myint iDasherMaxX, myint iDasherMinY, myint iDasherMinX, myint iDasherMaxY, const int Color, int iOutlineColour, int iThickness) {
//This assertion is more aggressive than necessary (Dasher has been working
// in many cases where it would fail, with only occassional display glitches)
// so if it causes trouble, it should be safe to remove...
DASHER_ASSERT(iDasherMinX <= iDasherMaxX && iDasherMinY <= iDasherMaxY);
//TODO Parameter names correspond to the values passed in,
// but the below will only match up with screen coords for LR orientation...
screenint iScreenLeft;
screenint iScreenTop;
screenint iScreenRight;
screenint iScreenBottom;
Dasher2Screen(iDasherMaxX, iDasherMinY, iScreenLeft, iScreenTop);
Dasher2Screen(iDasherMinX, iDasherMaxY, iScreenRight, iScreenBottom);
Screen()->DrawRectangle(iScreenLeft, iScreenTop, iScreenRight, iScreenBottom, Color, iOutlineColour, iThickness);
}
/// Draw a rectangle centred on a given dasher co-ordinate, but with a size specified in screen co-ordinates (used for drawing the mouse blob)
void CDasherView::DasherDrawCentredRectangle(myint iDasherX, myint iDasherY, screenint iSize, const int Color, bool bDrawOutline) {
screenint iScreenX;
screenint iScreenY;
Dasher2Screen(iDasherX, iDasherY, iScreenX, iScreenY);
Screen()->DrawRectangle(iScreenX - iSize, iScreenY - iSize, iScreenX + iSize, iScreenY + iSize, Color, -1, bDrawOutline ? 1 : 0);
}
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