kmag/kmagselrect.cpp

   1 /***************************************************************************
   2                           kmagselrect.cpp  -  description
   3                              -------------------
   4     begin                : Mon Feb 12 23:45:41 EST 2001
   5     copyright            : (C) 2001-2003 by Sarang Lakare
   6     email                : sarang#users.sf.net
   7     copyright            : (C) 2003-2004 by Olaf Schmidt
   8     email                : ojschmidt@kde.org
   9  ***************************************************************************/
  10
  11 /***************************************************************************
  12  *                                                                         *
  13  *   This program is free software; you can redistribute it and/or modify  *
  14  *   it under the terms of the GNU General Public License as published by  *
  15  *   the Free Software Foundation; either version 2 of the License, or     *
  16  *   (at your option) any later version.                                   *
  17  *                                                                         *
  18  ***************************************************************************/
  19
  20 #include "kmagselrect.h"
  21 #include "kmagselrect.moc"
  22
  23 #include <QtGui/QApplication>
  24 #include <QtGui/QCursor>
  25 #include <QtGui/QPixmap>
  26 #include <QtGui/QBitmap>
  27 #include <QtGui/QMouseEvent>
  28 #include <QtGui/QLabel>
  29 #include <QtGui/QDesktopWidget>
  30
  31 #include <klocale.h>
  32
  33 static uchar line_bits[] = {0x2d, 0x96, 0x4b, 0xa5, 0xd2, 0x69, 0xb4, 0x5a};
  34
  35 static QColor titleColor = QColor (0,0,128);
  36 static QColor titleBtnColor = QColor (255,255,0);
  37 static QColor textColor = QColor (255,255,255);
  38
  39 static int frameSize = 10;
  40 static int titleSize = 24;
  41
  42 void setTitleColors (const QColor &title, const QColor &text, const QColor &titleBtn)
  43 {
  44   titleColor = title;
  45   titleBtnColor = titleBtn;
  46   textColor = text;
  47 }
  48
  49 void setFrameSize (int size)
  50 {
  51   frameSize = size;
  52 }
  53
  54 void setTitleSize (int size)
  55 {
  56   titleSize = size;
  57 }
  58
  59 QColor getTitleColor ()
  60 {
  61   return titleColor;
  62 }
  63
  64 QColor getTitleBtnColor ()
  65 {
  66   return titleBtnColor;
  67 }
  68
  69 QColor getTextColor ()
  70 {
  71   return textColor;
  72 }
  73
  74 int getFrameSize ()
  75 {
  76   return frameSize;
  77 }
  78
  79 int getTitleSize ()
  80 {
  81   if (titleSize > frameSize)
  82     return titleSize;
  83   else
  84     return frameSize;
  85 }
  86
  87 //--------------------------------------------------------------------------
  88 //   Construction
  89 //--------------------------------------------------------------------------
  90
  91 KMagSelRect::KMagSelRect(QWidget *parent) :
  92   QRect()
  93 {
  94   init(parent);
  95 }
  96
  97 KMagSelRect::KMagSelRect(const QPoint &topLeft, const QPoint &bottomRight,
  98                  QWidget *parent) :
  99 QRect(topLeft, bottomRight)
 100 {
 101   init(parent);
 102 }
 103
 104 KMagSelRect::KMagSelRect(const QPoint &topLeft, const QSize &size,
 105                  QWidget *parent) :
 106 QRect(topLeft, size)
 107 {
 108   init(parent);
 109 }
 110
 111 KMagSelRect::KMagSelRect(int left, int top, int width, int height,
 112                  QWidget *parent) :
 113 QRect(left, top, width, height)
 114 {
 115   init(parent);
 116 }
 117
 118 void KMagSelRect::init(QWidget *parent)
 119 {
 120   // Make sure parent is the window itself, not a widget within the window
 121   if (parent != 0)
 122     while (parent->parentWidget (true) != 0)
 123       parent=parent->parentWidget (true);
 124
 125   selectionwindow = 0;
 126   selWindowParent = parent;
 127
 128   m_alwaysVisible = false;
 129 }
 130
 131 KMagSelRect::~KMagSelRect()
 132 {
 133 }
 134
 135 //--------------------------------------------------------------------------
 136 //
 137 //--------------------------------------------------------------------------
 138
 139 bool KMagSelRect::visible()
 140 {
 141   return (selectionwindow != 0);
 142 }
 143
 144 void KMagSelRect::alwaysVisible(bool visible)
 145 {
 146   m_alwaysVisible = visible;
 147 }
 148
 149
 150 //--------------------------------------------------------------------------
 151 //   Slots
 152 //--------------------------------------------------------------------------
 153
 154 void KMagSelRect::show()
 155 {
 156   if (selectionwindow == 0) {
 157     selectionwindow = new KMagSelWin (selWindowParent);
 158     selectionwindow->setObjectName("selectionwindow");
 159     connect (selectionwindow, SIGNAL (resized ()), this, SLOT (selWinResized ()));
 160
 161     update();
 162     selectionwindow->show();
 163     selWindowParent->setActiveWindow();
 164   }
 165 }
 166
 167 void KMagSelRect::hide()
 168 {
 169   if(m_alwaysVisible)
 170     return;
 171   if (selectionwindow != 0) {
 172     selectionwindow->hide();
 173     delete selectionwindow;
 174     selectionwindow = 0;
 175   }
 176 }
 177
 178 void KMagSelRect::update()
 179 {
 180   if (selectionwindow != 0)
 181     selectionwindow->setSelRect (QRect (topLeft(), bottomRight()));
 182 }
 183
 184 void KMagSelRect::selWinResized()
 185 {
 186   if (selectionwindow != 0)
 187   {
 188     QRect newRect = selectionwindow->getSelRect();
 189     setRect (newRect.x(), newRect.y(), newRect.width(), newRect.height());
 190   }
 191 }
 192
 193 //--------------------------------------------------------------------------
 194 //   KMagSelWin
 195 //--------------------------------------------------------------------------
 196
 197 KMagSelWin::KMagSelWin ( QWidget * parent, Qt::WFlags ) :
 198     QWidget (parent, Qt::WStyle_Customize | Qt::WStyle_NoBorder | Qt::WStyle_StaysOnTop | Qt::WType_TopLevel | Qt::WX11BypassWM)
 199 {
 200   QBitmap line = QBitmap::fromData( QSize(8,  8),  line_bits);
 201   setPaletteBackgroundPixmap (line);
 202   setBackgroundOrigin (QWidget::WindowOrigin);
 203
 204   titleBar = new KMagSelWinCorner (this);
 205   titleBar->setObjectName("titlebar");
 206   titleBar->setPaletteBackgroundColor (getTitleColor ());
 207   titleBar->setPaletteForegroundColor (getTextColor ());
 208   titleBar->setText(i18n("Selection Window")+" - "+i18n("KMagnifier"));
 209   connect (titleBar, SIGNAL (startResizing ()), this, SLOT (startResizing ()));
 210   connect (titleBar, SIGNAL (resized (QPoint)), this, SLOT (titleMoved (QPoint)));
 211
 212   topLeftCorner = new KMagSelWinCorner (this);
 213   topLeftCorner->setObjectName("topleft");
 214   topLeftCorner->setCursor (Qt::SizeFDiagCursor);
 215   topLeftCorner->setPaletteBackgroundColor (getTitleBtnColor ());
 216   connect (topLeftCorner, SIGNAL (startResizing ()), this, SLOT (startResizing ()));
 217   connect (topLeftCorner, SIGNAL (resized (QPoint)), this, SLOT (topLeftResized (QPoint)));
 218
 219   topRightCorner = new KMagSelWinCorner (this);
 220   topRightCorner->setObjectName("topright");
 221   topRightCorner->setCursor (Qt::SizeBDiagCursor);
 222   topRightCorner->setPaletteBackgroundColor (getTitleBtnColor ());
 223   connect (topRightCorner, SIGNAL (startResizing ()), this, SLOT (startResizing ()));
 224   connect (topRightCorner, SIGNAL (resized (QPoint)), this, SLOT (topRightResized (QPoint)));
 225
 226   bottomLeftCorner = new KMagSelWinCorner (this);
 227   bottomLeftCorner->setObjectName("bottomleft");
 228   bottomLeftCorner->setCursor (Qt::SizeBDiagCursor);
 229   bottomLeftCorner->setPaletteBackgroundColor (getTitleBtnColor ());
 230   connect (bottomLeftCorner, SIGNAL (startResizing ()), this, SLOT (startResizing ()));
 231   connect (bottomLeftCorner, SIGNAL (resized (QPoint)), this, SLOT (bottomLeftResized (QPoint)));
 232
 233   bottomRightCorner = new KMagSelWinCorner (this);
 234   bottomRightCorner->setObjectName("bottomright");
 235   bottomRightCorner->setCursor (Qt::SizeFDiagCursor);
 236   bottomRightCorner->setPaletteBackgroundColor (getTitleBtnColor ());
 237   connect (bottomRightCorner, SIGNAL (startResizing ()), this, SLOT (startResizing ()));
 238   connect (bottomRightCorner, SIGNAL (resized (QPoint)), this, SLOT (bottomRightResized (QPoint)));
 239 }
 240
 241 KMagSelWin::~KMagSelWin()
 242 {
 243   delete titleBar;
 244   delete topLeftCorner;
 245   delete topRightCorner;
 246   delete bottomLeftCorner;
 247   delete bottomRightCorner;
 248 }
 249
 250 void KMagSelWin::setSelRect (const QRect &_selRect)
 251 {
 252   QRect selRect = _selRect.normalized();
 253
 254   if (selRect.left() < 0)
 255     selRect.setLeft (0);
 256   if (selRect.top() < 0)
 257     selRect.setTop (0);
 258   if (selRect.right() > QApplication::desktop()->width())
 259     selRect.setRight (QApplication::desktop()->width());
 260   if (selRect.bottom() > QApplication::desktop()->height())
 261     selRect.setBottom (QApplication::desktop()->height());
 262
 263   setGeometry (
 264       selRect.left() - getFrameSize(),
 265       selRect.top() - getTitleSize() - 2,
 266       selRect.width() + getFrameSize() + getFrameSize(),
 267       selRect.height() + getFrameSize() + getTitleSize()+2);
 268
 269   int w = getFrameSize();
 270   if (selRect.width() < w+w)
 271     w = static_cast<int>(selRect.width()/2);
 272
 273   int h = getFrameSize();
 274   if (selRect.height() < h+h)
 275     h = static_cast<int>(selRect.height()/2);
 276
 277   setMask (QRegion (QRect (0, 0, width(), height ()))
 278            - QRegion (QRect (getFrameSize(), getTitleSize()+2, selRect.width(), selRect.height()))
 279            - QRegion (QRect (0, 0, getFrameSize()+w, getTitleSize()+2-getFrameSize()))
 280            - QRegion (QRect (width()-getFrameSize()-w, 0, getFrameSize()+w, getTitleSize()+2-getFrameSize()))
 281            - QRegion (QRect (0, getTitleSize()+2+h, getFrameSize()-2, selRect.height()-h-h))
 282            - QRegion (QRect (width()-getFrameSize()+2, getTitleSize()+2+h, getFrameSize()-2, selRect.height()-h-h))
 283            - QRegion (QRect (getFrameSize()+w, height()-getFrameSize()+2, selRect.width()-w-w, getFrameSize()-2)));
 284
 285   titleBar->setGeometry (getFrameSize()+w, 0, selRect.width()-h-h, getTitleSize());
 286   topLeftCorner->setGeometry (0, getTitleSize()+2-getFrameSize(), getFrameSize()+w, getFrameSize()+h);
 287   topRightCorner->setGeometry (width()-getFrameSize()-w, getTitleSize()+2-getFrameSize(), getFrameSize()+w, getFrameSize()+h);
 288   bottomLeftCorner->setGeometry (0, height()-getFrameSize()-h, getFrameSize()+w, getFrameSize()+h);
 289   bottomRightCorner->setGeometry (width()-getFrameSize()-w, height()-getFrameSize()-h, getFrameSize()+w, getFrameSize()+h);
 290 }
 291
 292 QRect KMagSelWin::getSelRect ()
 293 {
 294   return QRect (
 295       x() + getFrameSize(),
 296       y() + getTitleSize()+2,
 297       width() - getFrameSize() - getFrameSize(),
 298       height() - getFrameSize() - getTitleSize()-2);
 299 }
 300
 301 void KMagSelWin::startResizing ()
 302 {
 303   oldSelRect = getSelRect();
 304 }
 305
 306 void KMagSelWin::titleMoved (const QPoint &offset)
 307 {
 308   QRect selRect = oldSelRect;
 309   selRect.translate (offset.x(), offset.y());
 310   setSelRect (selRect);
 311   emit resized ();
 312 }
 313
 314 void KMagSelWin::topLeftResized (const QPoint &offset)
 315 {
 316   setSelRect (QRect(oldSelRect.topLeft() + offset, oldSelRect.bottomRight ()));
 317   emit resized();
 318 }
 319
 320 void KMagSelWin::topRightResized (const QPoint &offset)
 321 {
 322   setSelRect (QRect(oldSelRect.topRight() + offset, oldSelRect.bottomLeft ()));
 323   emit resized();
 324 }
 325
 326 void KMagSelWin::bottomLeftResized (const QPoint &offset)
 327 {
 328   setSelRect (QRect(oldSelRect.bottomLeft() + offset, oldSelRect.topRight ()));
 329   emit resized();
 330 }
 331
 332 void KMagSelWin::bottomRightResized (const QPoint &offset)
 333 {
 334   setSelRect (QRect(oldSelRect.bottomRight() + offset, oldSelRect.topLeft()));
 335   emit resized();
 336 }
 337
 338
 339 //--------------------------------------------------------------------------
 340 //   KMagSelWinCorner
 341 //--------------------------------------------------------------------------
 342
 343 KMagSelWinCorner::KMagSelWinCorner ( QWidget * parent, Qt::WFlags f ) :
 344     QLabel (parent, f)
 345 {
 346   setBackgroundMode (Qt::FixedColor);
 347   setFrameStyle (QFrame::WinPanel | QFrame::Raised);
 348   setLineWidth (1);
 349 }
 350
 351 KMagSelWinCorner::~KMagSelWinCorner()
 352 {
 353 }
 354
 355 void KMagSelWinCorner::mousePressEvent ( QMouseEvent * e )
 356 {
 357   oldPos = e->globalPos ();
 358   emit startResizing ();
 359 }
 360
 361 void KMagSelWinCorner::mouseReleaseEvent ( QMouseEvent * e )
 362 {
 363   setFrameShadow (QFrame::Raised);
 364   emit resized (e->globalPos () - oldPos);
 365 }
 366
 367 void KMagSelWinCorner::mouseMoveEvent ( QMouseEvent * e )
 368 {
 369   emit resized (e->globalPos () - oldPos);
 370 }