workspace/kwin/clients/oxygen/oxygenbutton.cpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 // oxygenbutton.cpp
   3 // -------------------
   4 // Oxygen window decoration for KDE. Buttons.
   5 // -------------------
   6 // Copyright (c) 2006, 2007 Riccardo Iaconelli <riccardo@kde.org>
   7 // Copyright (c) 2006, 2007 Casper Boemann <cbr@boemann.dk>
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining a copy
  10 // of this software and associated documentation files (the "Software"), to
  11 // deal in the Software without restriction, including without limitation the
  12 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  13 // sell copies of the Software, and to permit persons to whom the Software is
  14 // furnished to do so, subject to the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be included in
  17 // all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  25 // IN THE SOFTWARE.
  26 //////////////////////////////////////////////////////////////////////////////
  27 #include <math.h>
  28 #include <QPainterPath>
  29 #include <QPainter>
  30 #include <QPen>
  31 #include <QBitmap>
  32
  33 #include <kdecoration.h>
  34 #include <kglobal.h>
  35 #include <KColorUtils>
  36 #include <kdebug.h>
  37 #include <KColorScheme>
  38
  39 #include "oxygenclient.h"
  40 #include "oxygenbutton.h"
  41 #include "oxygen.h"
  42
  43 namespace Oxygen
  44 {
  45 // class OxygenClient;
  46 /*
  47 extern int BUTTONSIZE;
  48 extern int DECOSIZE;*/
  49
  50 // static const int DECOSIZE        = 8;
  51 //////////////////////////////////////////////////////////////////////////////
  52 // OxygenButton Class                                                      //
  53 //////////////////////////////////////////////////////////////////////////////
  54
  55 //////////////////////////////////////////////////////////////////////////////
  56 // OxygenButton()
  57 // ---------------
  58 // Constructor
  59
  60 OxygenButton::OxygenButton(OxygenClient &parent,
  61                              const QString& tip, ButtonType type)
  62     : KCommonDecorationButton((::ButtonType)type, &parent)
  63     , client_(parent)
  64     , helper_(parent.helper_)
  65     , type_(type)
  66     , lastmouse_(0)
  67     , colorCacheInvalid_(true)
  68 {
  69     setAutoFillBackground(false);
  70     setAttribute(Qt::WA_OpaquePaintEvent, false);
  71     setFixedSize(OXYGEN_BUTTONSIZE, OXYGEN_BUTTONSIZE);
  72     setCursor(Qt::ArrowCursor);
  73     setToolTip(tip);
  74 }
  75
  76 OxygenButton::~OxygenButton()
  77 {
  78 }
  79
  80 //declare function from oxygenclient.cpp
  81 QColor reduceContrast(const QColor &c0, const QColor &c1, double t);
  82
  83
  84 QColor OxygenButton::buttonDetailColor(const QPalette &palette)
  85 {
  86     if (client_.isActive())
  87         return palette.color(QPalette::Active, QPalette::ButtonText);
  88     else {
  89         if (colorCacheInvalid_) {
  90             QColor ab = palette.color(QPalette::Active, QPalette::Button);
  91             QColor af = palette.color(QPalette::Active, QPalette::ButtonText);
  92             QColor nb = palette.color(QPalette::Inactive, QPalette::Button);
  93             QColor nf = palette.color(QPalette::Inactive, QPalette::ButtonText);
  94
  95             colorCacheInvalid_ = false;
  96             cachedButtonDetailColor_ = reduceContrast(nb, nf, qMax(qreal(2.5), KColorUtils::contrastRatio(ab, KColorUtils::mix(ab, af, 0.4))));
  97         }
  98         return cachedButtonDetailColor_;
  99     }
 100 }
 101
 102 //////////////////////////////////////////////////////////////////////////////
 103 // sizeHint()
 104 // ----------
 105 // Return size hint
 106
 107 QSize OxygenButton::sizeHint() const
 108 {
 109     return QSize(OXYGEN_BUTTONSIZE, OXYGEN_BUTTONSIZE);
 110 }
 111
 112 //////////////////////////////////////////////////////////////////////////////
 113 // enterEvent()
 114 // ------------
 115 // Mouse has entered the button
 116
 117 void OxygenButton::enterEvent(QEvent *e)
 118 {
 119     KCommonDecorationButton::enterEvent(e);
 120     if (status_ != Oxygen::Pressed) {
 121         status_ = Oxygen::Hovered;
 122     }
 123     update();
 124 }
 125
 126 //////////////////////////////////////////////////////////////////////////////
 127 // leaveEvent()
 128 // ------------
 129 // Mouse has left the button
 130
 131 void OxygenButton::leaveEvent(QEvent *e)
 132 {
 133     KCommonDecorationButton::leaveEvent(e);
 134     // if we wanted to do mouseovers, we would keep track of it here
 135     status_ = Oxygen::Normal;
 136     update();
 137 }
 138
 139 //////////////////////////////////////////////////////////////////////////////
 140 // pressSlot()
 141 // ------------
 142 // Mouse has pressed the button
 143
 144 void OxygenButton::pressSlot()
 145 {
 146     status_ = Oxygen::Pressed;
 147     update();
 148 }
 149 //////////////////////////////////////////////////////////////////////////////
 150 // drawButton()
 151 // ------------
 152 // Draw the button
 153
 154 void OxygenButton::paintEvent(QPaintEvent *)
 155 {
 156     QPainter painter(this);
 157     QPalette pal = palette(); // de-const-ify
 158
 159     if (type_ == ButtonMenu) {
 160         // we paint the mini icon (which is 16 pixels high)
 161         int dx = (width() - 16) / 2;
 162         int dy = (height() - 16) / 2;
 163         painter.drawPixmap(dx, dy, client_.icon().pixmap(16));
 164         return;
 165     }
 166
 167     // Set palette to the right group.
 168     // TODO - fix KWin to do this for us :-).
 169     if (client_.isActive())
 170         pal.setCurrentColorGroup(QPalette::Active);
 171     else
 172         pal.setCurrentColorGroup(QPalette::Inactive);
 173
 174     if(client_.maximizeMode() == OxygenClient::MaximizeRestore)
 175         painter.translate(0,-1);
 176
 177     QColor bg = helper_.backgroundTopColor(pal.window());
 178
 179     QLinearGradient lg = helper_.decoGradient(QRect(4,4,13,13), buttonDetailColor(pal));
 180
 181     if(status_ == Oxygen::Hovered) {
 182         if(type_ == ButtonClose) {
 183             QColor color = KColorScheme(pal.currentColorGroup()).foreground(KColorScheme::NegativeText).color();
 184             lg = helper_.decoGradient(QRect(4,4,13,13), color);
 185             painter.drawPixmap(0, 0, helper_.windecoButtonFocused(pal.button(), color,7));
 186         }
 187         else{
 188             QColor color = KColorScheme(pal.currentColorGroup()).decoration(KColorScheme::HoverColor).color();
 189             painter.drawPixmap(0, 0, helper_.windecoButtonFocused(pal.button(), color, 7));
 190         }
 191     }
 192     else
 193         painter.drawPixmap(0, 0, helper_.windecoButton(pal.button()));
 194
 195     painter.setRenderHints(QPainter::Antialiasing);
 196     painter.setBrush(Qt::NoBrush);
 197     painter.setPen(QPen(lg, 2.2, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
 198     switch(type_)
 199     {
 200         case ButtonSticky:
 201             painter.drawPoint(QPointF(10.5,10.5));
 202             break;
 203         case ButtonHelp:
 204             painter.translate(1.5, 1.5);
 205             painter.drawArc(7,5,4,4,135*16, -180*16);
 206             painter.drawArc(9,8,4,4,135*16,45*16);
 207             painter.drawPoint(9,12);
 208             break;
 209         case ButtonMin:
 210             painter.drawLine(QPointF( 7.5, 9.5), QPointF(10.5,12.5));
 211             painter.drawLine(QPointF(10.5,12.5), QPointF(13.5, 9.5));
 212             break;
 213         case ButtonMax:
 214             switch(client_.maximizeMode())
 215             {
 216                 case OxygenClient::MaximizeRestore:
 217                 case OxygenClient::MaximizeVertical:
 218                 case OxygenClient::MaximizeHorizontal:
 219                     painter.drawLine(QPointF( 7.5,11.5), QPointF(10.5, 8.5));
 220                     painter.drawLine(QPointF(10.5, 8.5), QPointF(13.5,11.5));
 221                     break;
 222                 case OxygenClient::MaximizeFull:
 223                 {
 224                     painter.translate(1.5, 1.5);
 225                     //painter.setBrush(lg);
 226                     QPoint points[4] = {QPoint(9, 6), QPoint(12, 9), QPoint(9, 12), QPoint(6, 9)};
 227                     //QPoint points[4] = {QPoint(9, 5), QPoint(13, 9), QPoint(9, 13), QPoint(5, 9)};
 228                     painter.drawPolygon(points, 4);
 229                     break;
 230                 }
 231             }
 232             break;
 233         case ButtonClose:
 234             painter.drawLine(QPointF( 7.5,7.5), QPointF(13.5,13.5));
 235             painter.drawLine(QPointF(13.5,7.5), QPointF( 7.5,13.5));
 236             break;
 237         case ButtonAbove:
 238             if(isChecked()) {
 239                 QPen newPen = painter.pen();
 240                 newPen.setColor(KColorScheme(pal.currentColorGroup()).decoration(KColorScheme::HoverColor).color());
 241                 painter.setPen(newPen);
 242             }
 243
 244             painter.drawLine(QPointF( 7.5,14), QPointF(10.5,11));
 245             painter.drawLine(QPointF(10.5,11), QPointF(13.5,14));
 246             painter.drawLine(QPointF( 7.5,10), QPointF(10.5, 7));
 247             painter.drawLine(QPointF(10.5, 7), QPointF(13.5,10));
 248             break;
 249         case ButtonBelow:
 250             if(isChecked()) {
 251                 QPen newPen = painter.pen();
 252                 newPen.setColor(KColorScheme(pal.currentColorGroup()).decoration(KColorScheme::HoverColor).color());
 253                 painter.setPen(newPen);
 254             }
 255
 256             painter.drawLine(QPointF( 7.5,11), QPointF(10.5,14));
 257             painter.drawLine(QPointF(10.5,14), QPointF(13.5,11));
 258             painter.drawLine(QPointF( 7.5, 7), QPointF(10.5,10));
 259             painter.drawLine(QPointF(10.5,10), QPointF(13.5, 7));
 260             break;
 261         default:
 262             break;
 263     }
 264 }
 265
 266
 267
 268
 269
 270
 271
 272
 273 } //namespace Oxygen