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Plasma

combobox.cpp

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00001 /*
00002  *   Copyright 2008 Aaron Seigo <aseigo@kde.org>
00003  *
00004  *   This program is free software; you can redistribute it and/or modify
00005  *   it under the terms of the GNU Library General Public License as
00006  *   published by the Free Software Foundation; either version 2, or
00007  *   (at your option) any later version.
00008  *
00009  *   This program is distributed in the hope that it will be useful,
00010  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *   GNU General Public License for more details
00013  *
00014  *   You should have received a copy of the GNU Library General Public
00015  *   License along with this program; if not, write to the
00016  *   Free Software Foundation, Inc.,
00017  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00018  */
00019 
00020 #include "combobox.h"
00021 
00022 #include <QPainter>
00023 #include <QApplication>
00024 
00025 #include <kcombobox.h>
00026 #include <kmimetype.h>
00027 #include <kiconeffect.h>
00028 #include <kiconloader.h>
00029 
00030 #include <plasma/private/style_p.h>
00031 #include "theme.h"
00032 #include "framesvg.h"
00033 #include "animator.h"
00034 #include "paintutils.h"
00035 
00036 namespace Plasma
00037 {
00038 
00039 class ComboBoxPrivate
00040 {
00041 public:
00042     ComboBoxPrivate(ComboBox *comboBox)
00043          : q(comboBox),
00044            background(0)
00045     {
00046     }
00047 
00048     ~ComboBoxPrivate()
00049     {
00050     }
00051 
00052     void syncActiveRect();
00053     void syncBorders();
00054     void animationUpdate(qreal progress);
00055 
00056     ComboBox *q;
00057 
00058     FrameSvg *background;
00059     int animId;
00060     bool fadeIn;
00061     qreal opacity;
00062     QRectF activeRect;
00063     Plasma::Style::Ptr style;
00064 };
00065 
00066 void ComboBoxPrivate::syncActiveRect()
00067 {
00068     background->setElementPrefix("normal");
00069 
00070     qreal left, top, right, bottom;
00071     background->getMargins(left, top, right, bottom);
00072 
00073     background->setElementPrefix("active");
00074     qreal activeLeft, activeTop, activeRight, activeBottom;
00075     background->getMargins(activeLeft, activeTop, activeRight, activeBottom);
00076 
00077     activeRect = QRectF(QPointF(0, 0), q->size());
00078     activeRect.adjust(left - activeLeft, top - activeTop,
00079                       -(right - activeRight), -(bottom - activeBottom));
00080 
00081     background->setElementPrefix("normal");
00082 }
00083 
00084 void ComboBoxPrivate::syncBorders()
00085 {
00086     //set margins from the normal element
00087     qreal left, top, right, bottom;
00088 
00089     background->setElementPrefix("normal");
00090     background->getMargins(left, top, right, bottom);
00091     q->setContentsMargins(left, top, right, bottom);
00092 
00093     //calc the rect for the over effect
00094     syncActiveRect();
00095 
00096     KComboBox *native = q->nativeWidget();
00097     QColor color = Theme::defaultTheme()->color(Theme::TextColor);
00098     QPalette p = native->palette();
00099 
00100     p.setColor(QPalette::Normal, QPalette::Text, color);
00101     p.setColor(QPalette::Inactive, QPalette::Text, color);
00102     native->setPalette(p);
00103     native->setFont(Plasma::Theme::defaultTheme()->font(Plasma::Theme::DefaultFont));
00104 }
00105 
00106 void ComboBoxPrivate::animationUpdate(qreal progress)
00107 {
00108     if (progress == 1) {
00109         animId = -1;
00110         fadeIn = true;
00111     }
00112 
00113     opacity = fadeIn ? progress : 1 - progress;
00114 
00115     // explicit update
00116     q->update();
00117 }
00118 
00119 ComboBox::ComboBox(QGraphicsWidget *parent)
00120     : QGraphicsProxyWidget(parent),
00121       d(new ComboBoxPrivate(this))
00122 {
00123     KComboBox *native = new KComboBox;
00124     connect(native, SIGNAL(activated(const QString &)), this, SIGNAL(activated(const QString &)));
00125     setWidget(native);
00126     native->setAttribute(Qt::WA_NoSystemBackground);
00127 
00128     d->background = new FrameSvg(this);
00129     d->background->setImagePath("widgets/button");
00130     d->background->setCacheAllRenderedFrames(true);
00131     d->background->setElementPrefix("normal");
00132 
00133     d->syncBorders();
00134     setAcceptHoverEvents(true);
00135     connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()), SLOT(syncBorders()));
00136     d->style = Plasma::Style::sharedStyle();
00137     native->setStyle(d->style.data());
00138 }
00139 
00140 ComboBox::~ComboBox()
00141 {
00142     delete d;
00143     Plasma::Style::doneWithSharedStyle();
00144 }
00145 
00146 QString ComboBox::text() const
00147 {
00148     return static_cast<KComboBox*>(widget())->currentText();
00149 }
00150 
00151 void ComboBox::setStyleSheet(const QString &stylesheet)
00152 {
00153     widget()->setStyleSheet(stylesheet);
00154 }
00155 
00156 QString ComboBox::styleSheet()
00157 {
00158     return widget()->styleSheet();
00159 }
00160 
00161 KComboBox *ComboBox::nativeWidget() const
00162 {
00163     return static_cast<KComboBox*>(widget());
00164 }
00165 
00166 void ComboBox::addItem(const QString &text)
00167 {
00168     static_cast<KComboBox*>(widget())->addItem(text);
00169 }
00170 
00171 void ComboBox::clear()
00172 {
00173     static_cast<KComboBox*>(widget())->clear();
00174 }
00175 
00176 void ComboBox::resizeEvent(QGraphicsSceneResizeEvent *event)
00177 {
00178    if (d->background) {
00179         //resize needed panels
00180         d->syncActiveRect();
00181 
00182         d->background->setElementPrefix("focus");
00183         d->background->resizeFrame(size());
00184 
00185         d->background->setElementPrefix("active");
00186         d->background->resizeFrame(d->activeRect.size());
00187 
00188         d->background->setElementPrefix("normal");
00189         d->background->resizeFrame(size());
00190    }
00191 
00192    QGraphicsProxyWidget::resizeEvent(event);
00193 }
00194 
00195 void ComboBox::paint(QPainter *painter,
00196                      const QStyleOptionGraphicsItem *option,
00197                      QWidget *widget)
00198 {
00199     if (!styleSheet().isNull() || nativeWidget()->isEditable()) {
00200         QGraphicsProxyWidget::paint(painter, option, widget);
00201         return;
00202     }
00203 
00204     QPixmap bufferPixmap;
00205 
00206     //normal button
00207     if (isEnabled()) {
00208         d->background->setElementPrefix("normal");
00209 
00210         if (d->animId == -1) {
00211             d->background->paintFrame(painter);
00212         }
00213     //disabled widget
00214     } else {
00215         bufferPixmap = QPixmap(rect().size().toSize());
00216         bufferPixmap.fill(Qt::transparent);
00217 
00218         QPainter buffPainter(&bufferPixmap);
00219         d->background->paintFrame(&buffPainter);
00220         buffPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
00221         buffPainter.fillRect(bufferPixmap.rect(), QColor(0, 0, 0, 128));
00222 
00223         painter->drawPixmap(0, 0, bufferPixmap);
00224     }
00225 
00226     //if is under mouse draw the animated glow overlay
00227     if (isEnabled() && acceptHoverEvents()) {
00228         if (d->animId != -1) {
00229             d->background->setElementPrefix("normal");
00230             QPixmap normalPix = d->background->framePixmap();
00231             d->background->setElementPrefix("active");
00232             painter->drawPixmap(
00233                 d->activeRect.topLeft(),
00234                 PaintUtils::transition(d->background->framePixmap(), normalPix, 1 - d->opacity));
00235         } else if (isUnderMouse()) {
00236             d->background->setElementPrefix("active");
00237             d->background->paintFrame(painter, d->activeRect.topLeft());
00238         }
00239     }
00240 
00241     if (nativeWidget()->hasFocus()) {
00242         d->background->setElementPrefix("focus");
00243         d->background->paintFrame(painter);
00244     }
00245 
00246     painter->setPen(Plasma::Theme::defaultTheme()->color(Theme::ButtonTextColor));
00247 
00248     QStyleOptionComboBox comboOpt;
00249 
00250     comboOpt.initFrom(nativeWidget());
00251 
00252     comboOpt.palette.setColor(
00253         QPalette::ButtonText, Plasma::Theme::defaultTheme()->color(Plasma::Theme::ButtonTextColor));
00254     comboOpt.currentIcon = nativeWidget()->itemIcon(
00255         nativeWidget()->currentIndex());
00256     comboOpt.currentText = nativeWidget()->itemText(
00257         nativeWidget()->currentIndex());
00258     comboOpt.editable = false;
00259 
00260     nativeWidget()->style()->drawControl(
00261         QStyle::CE_ComboBoxLabel, &comboOpt, painter, nativeWidget());
00262     comboOpt.rect = nativeWidget()->style()->subControlRect(
00263         QStyle::CC_ComboBox, &comboOpt, QStyle::SC_ComboBoxArrow, nativeWidget());
00264     nativeWidget()->style()->drawPrimitive(
00265         QStyle::PE_IndicatorArrowDown, &comboOpt, painter, nativeWidget());
00266 }
00267 
00268 void ComboBox::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
00269 {
00270     const int FadeInDuration = 75;
00271 
00272     if (d->animId != -1) {
00273         Plasma::Animator::self()->stopCustomAnimation(d->animId);
00274     }
00275     d->animId = Plasma::Animator::self()->customAnimation(
00276         40 / (1000 / FadeInDuration), FadeInDuration,
00277         Plasma::Animator::LinearCurve, this, "animationUpdate");
00278 
00279     d->background->setElementPrefix("active");
00280 
00281     QGraphicsProxyWidget::hoverEnterEvent(event);
00282 }
00283 
00284 void ComboBox::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
00285 {
00286     const int FadeOutDuration = 150;
00287 
00288     if (d->animId != -1) {
00289         Plasma::Animator::self()->stopCustomAnimation(d->animId != -1);
00290     }
00291 
00292     d->fadeIn = false;
00293     d->animId = Plasma::Animator::self()->customAnimation(
00294         40 / (1000 / FadeOutDuration),
00295         FadeOutDuration, Plasma::Animator::LinearCurve, this, "animationUpdate");
00296 
00297     d->background->setElementPrefix("active");
00298 
00299     QGraphicsProxyWidget::hoverLeaveEvent(event);
00300 }
00301 
00302 } // namespace Plasma
00303 
00304 #include <combobox.moc>
00305 

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