drawparams.cpp

LINUX 下以 QT/KDE 写的 SVN 客户端

/* This file is part of KCachegrind.
   Copyright (C) 2002, 2003 Josef Weidendorfer <[e-mail]>
   Adapted for the needs of kdesvn  by Rajko Albrecht <[e-mail]>

   KCachegrind 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, version 2.

   This program 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 this program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.
*/

/*
 * A Widget for visualizing hierarchical metrics as areas.
 * The API is similar to QListView.
 */

#include <math.h>

#include <qpainter.h>
#include <qtooltip.h>
#include <qregexp.h>
#include <qstyle.h>
#include <qpopupmenu.h>

#include <klocale.h>
#include <kconfig.h>
#include <kdebug.h>

#include "drawparams.h"


// set this to 1 to enable debug output
#define DEBUG_DRAWING 0
#define MAX_FIELD 12


//
// StoredDrawParams
//
StoredDrawParams::StoredDrawParams()
{
  _selected = false;
  _current = false;
  _shaded = true;
  _rotated = false;

  _backColor = Qt::white;

  // field array has size 0
}

StoredDrawParams::StoredDrawParams(QColor c,
                                   bool selected, bool current)
{
  _backColor = c;

  _selected = selected;
  _current = current;
  _shaded = true;
  _rotated = false;
  _drawFrame = true;

  // field array has size 0
}

QString StoredDrawParams::text(int f) const
{
  if ((f<0) || (f >= (int)_field.size()))
    return QString::null;

  return _field[f].text;
}

QPixmap StoredDrawParams::pixmap(int f) const
{
  if ((f<0) || (f >= (int)_field.size()))
    return QPixmap();

  return _field[f].pix;
}

DrawParams::Position StoredDrawParams::position(int f) const
{
  if ((f<0) || (f >= (int)_field.size()))
    return Default;

  return _field[f].pos;
}

int StoredDrawParams::maxLines(int f) const
{
  if ((f<0) || (f >= (int)_field.size()))
    return 0;

  return _field[f].maxLines;
}

const QFont& StoredDrawParams::font() const
{
  static QFont* f = 0;
  if (!f) f = new QFont(QApplication::font());

  return *f;
}

void StoredDrawParams::ensureField(int f)
{
  static Field* def = 0;
  if (!def) {
    def = new Field();
    def->pos = Default;
    def->maxLines = 0;
  }

  if (f<0 || f>=MAX_FIELD) return;

  if ((int)_field.size() < f+1) _field.resize(f+1, *def);
}


void StoredDrawParams::setField(int f, QString t, QPixmap pm,
                           Position p, int maxLines)
{
  if (f<0 || f>=MAX_FIELD) return;
  ensureField(f);

  _field[f].text = t;
  _field[f].pix  = pm;
  _field[f].pos  = p;
  _field[f].maxLines = maxLines;
}

void StoredDrawParams::setText(int f, QString t)
{
  if (f<0 || f>=MAX_FIELD) return;
  ensureField(f);

  _field[f].text = t;
}

void StoredDrawParams::setPixmap(int f, QPixmap pm)
{
  if (f<0 || f>=MAX_FIELD) return;
  ensureField(f);

  _field[f].pix = pm;
}

void StoredDrawParams::setPosition(int f, Position p)
{
  if (f<0 || f>=MAX_FIELD) return;
  ensureField(f);

  _field[f].pos = p;
}

void StoredDrawParams::setMaxLines(int f, int m)
{
  if (f<0 || f>=MAX_FIELD) return;
  ensureField(f);

  _field[f].maxLines = m;
}



//
// RectDrawing
//

RectDrawing::RectDrawing(QRect r)
{
  _fm = 0;
  _dp = 0;
  setRect(r);
}


RectDrawing::~RectDrawing()
{
  delete _fm;
  delete _dp;
}

DrawParams* RectDrawing::drawParams()
{
  if (!_dp)
    _dp = new StoredDrawParams();

  return _dp;
}


void RectDrawing::setDrawParams(DrawParams* dp)
{
  if (_dp) delete _dp;
  _dp = dp;
}

void RectDrawing::setRect(QRect r)
{
  _rect = r;

  _usedTopLeft = 0;
  _usedTopCenter = 0;
  _usedTopRight = 0;
  _usedBottomLeft = 0;
  _usedBottomCenter = 0;
  _usedBottomRight = 0;

  _fontHeight = 0;
}

QRect RectDrawing::remainingRect(DrawParams* dp)
{
  if (!dp) dp = drawParams();

  if ((_usedTopLeft >0) ||
      (_usedTopCenter >0) ||
      (_usedTopRight >0)) {
    if (dp->rotated())
      _rect.setLeft(_rect.left() + _fontHeight);
    else
      _rect.setTop(_rect.top() + _fontHeight);
  }

  if ((_usedBottomLeft >0) ||
      (_usedBottomCenter >0) ||
      (_usedBottomRight >0)) {
    if (dp->rotated())
      _rect.setRight(_rect.right() - _fontHeight);
    else
      _rect.setBottom(_rect.bottom() - _fontHeight);
  }
  return _rect;
}


void RectDrawing::drawBack(QPainter* p, DrawParams* dp)
{
  if (!dp) dp = drawParams();
  if (_rect.width()<=0 || _rect.height()<=0) return;

  QRect r = _rect;
  QColor normal = dp->backColor();
  if (dp->selected()) normal = normal.light();
  bool isCurrent = dp->current();

  if (dp->drawFrame() || isCurrent) {
    // 3D raised/sunken frame effect...
    QColor high = normal.light();
    QColor low = normal.dark();
    p->setPen( isCurrent ? low:high);
    p->drawLine(r.left(), r.top(), r.right(), r.top());
    p->drawLine(r.left(), r.top(), r.left(), r.bottom());
    p->setPen( isCurrent ? high:low);
    p->drawLine(r.right(), r.top(), r.right(), r.bottom());
    p->drawLine(r.left(), r.bottom(), r.right(), r.bottom());
    r.setRect(r.x()+1, r.y()+1, r.width()-2, r.height()-2);
  }
  if (r.width()<=0 || r.height()<=0) return;

  if (dp->shaded()) {
    // some shading
    bool goDark = qGray(normal.rgb())>128;
    int rBase, gBase, bBase;
    normal.rgb(&rBase, &gBase, &bBase);
    p->setBrush(QBrush::NoBrush);

    // shade parameters:
    int d = 7;
    float factor = 0.1, forth=0.7, back1 =0.9, toBack2 = .7, back2 = 0.97;

    // coefficient corrections because of rectangle size
    int s = r.width();
    if (s > r.height()) s = r.height();
    if (s<100) {
      forth -= .3  * (100-s)/100;
      back1 -= .2  * (100-s)/100;
      back2 -= .02 * (100-s)/100;
    }


    // maximal color difference
    int rDiff = goDark ? -rBase/d : (255-rBase)/d;
    int gDiff = goDark ? -gBase/d : (255-gBase)/d;
    int bDiff = goDark ? -bBase/d : (255-bBase)/d;

    QColor shadeColor;
    while (factor<.95) {
      shadeColor.setRgb((int)(rBase+factor*rDiff+.5),
                        (int)(gBase+factor*gDiff+.5),
                        (int)(bBase+factor*bDiff+.5));
      p->setPen(shadeColor);
      p->drawRect(r);
      r.setRect(r.x()+1, r.y()+1, r.width()-2, r.height()-2);
      if (r.width()<=0 || r.height()<=0) return;
      factor = 1.0 - ((1.0 - factor) * forth);
    }

    // and back (1st half)
    while (factor>toBack2) {
      shadeColor.setRgb((int)(rBase+factor*rDiff+.5),
                        (int)(gBase+factor*gDiff+.5),
                        (int)(bBase+factor*bDiff+.5));
      p->setPen(shadeColor);
      p->drawRect(r);
      r.setRect(r.x()+1, r.y()+1, r.width()-2, r.height()-2);
      if (r.width()<=0 || r.height()<=0) return;
      factor = 1.0 - ((1.0 - factor) / back1);
    }

    // and back (2nd half)
    while ( factor>.01) {
      shadeColor.setRgb((int)(rBase+factor*rDiff+.5),
                        (int)(gBase+factor*gDiff+.5),
                        (int)(bBase+factor*bDiff+.5));
      p->setPen(shadeColor);
      p->drawRect(r);
      r.setRect(r.x()+1, r.y()+1, r.width()-2, r.height()-2);
      if (r.width()<=0 || r.height()<=0) return;

      factor = factor * back2;
    }
  }

  // fill inside
  p->setPen(QPen::NoPen);
  p->setBrush(normal);
  p->drawRect(r);
}


bool RectDrawing::drawField(QPainter* p, int f, DrawParams* dp)
{
  if (!dp) dp = drawParams();

  if (!_fm) {
    _fm = new QFontMetrics(dp->font());
    _fontHeight = _fm->height();
  }

  QRect r = _rect;

  if (0) kdDebug(90100) << "DrawField: Rect " << r.x() << "/" << r.y()
		   << " - " << r.width() << "x" << r.height() << endl;