484 lines
19 KiB
C++
484 lines
19 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2013 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "gtkproxystyle.h"
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#include "gtkstyle.h"
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#include "osthumb.h"
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#include "config.h"
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#include <QComboBox>
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#include <QToolBar>
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#include <QAbstractScrollArea>
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#include <QScrollBar>
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#include <QApplication>
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#include <QHoverEvent>
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#include <QPainter>
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#include <QDesktopWidget>
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#include <QLibrary>
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const char * GtkProxyStyle::constSlimComboProperty="gtkslim";
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static bool revertQGtkStyleOverlayMod()
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{
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// TODO: This is not working. ubuntu_gtk_set_use_overlay_scrollbar is found, and called.
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// But, Gtk filechooser STILL has non-overlay scrollbars!!!
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typedef void (*SetUseOsFn) (int);
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// enforce the "0" suffix, so we'll open libgtk-x11-2.0.so.0
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QLibrary libgtk(QLatin1String("gtk-x11-2.0"), 0, 0);
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SetUseOsFn setUseOsFn = (SetUseOsFn)libgtk.resolve("ubuntu_gtk_set_use_overlay_scrollbar");;
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if (setUseOsFn) {
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setUseOsFn(!0);
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return true;
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}
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return false;
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}
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GtkProxyStyle::GtkProxyStyle(bool overlaySBars)
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: QProxyStyle()
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, thumb(0)
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, sbarWidth(-1)
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, sbarAreaWidth(-1)
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, sliderOffset(0xffffffff)
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, thumbTarget(0)
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{
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useOverlayScrollbars=overlaySBars && qgetenv("LIBOVERLAY_SCROLLBAR")!="0";
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setBaseStyle(qApp->style());
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toolbarCombo=new QComboBox(new QToolBar());
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if (useOverlayScrollbars) {
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int fh=QApplication::fontMetrics().height();
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sbarWebViewWidth=fh/1.75;
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if (Qt::LeftToRight==QApplication::layoutDirection() && revertQGtkStyleOverlayMod()) {
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sbarWidth=qMax(fh/5, 3);
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sbarAreaWidth=sbarWidth*6;
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thumb=new OsThumb();
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thumb->setVisible(false);
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connect(thumb, SIGNAL(thumbDragged(QPoint)), SLOT(thumbMoved(QPoint)));
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connect(thumb, SIGNAL(pageUp()), SLOT(sbarPageUp()));
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connect(thumb, SIGNAL(pageDown()), SLOT(sbarPageDown()));
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}
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}
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}
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GtkProxyStyle::~GtkProxyStyle()
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{
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destroySliderThumb();
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}
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static bool isWebView(const QWidget *widget)
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{
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return !widget || 0==qstrcmp(widget->metaObject()->className(), "QWebView");
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}
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QSize GtkProxyStyle::sizeFromContents(ContentsType type, const QStyleOption *option, const QSize &size, const QWidget *widget) const
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{
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QSize sz=baseStyle()->sizeFromContents(type, option, size, widget);
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if (CT_ComboBox==type && widget && widget->property(constSlimComboProperty).toBool()) {
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QSize orig=baseStyle()->sizeFromContents(type, option, size, widget);
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QSize other=baseStyle()->sizeFromContents(type, option, size, toolbarCombo);
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if (orig.height()>other.height()) {
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return QSize(orig.width(), other.height());
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}
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return orig;
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} else if (useOverlayScrollbars && CT_ScrollBar==type) {
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if (const QStyleOptionSlider *sb = qstyleoption_cast<const QStyleOptionSlider *>(option)) {
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int extent(pixelMetric(PM_ScrollBarExtent, option, widget)),
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sliderMin(pixelMetric(PM_ScrollBarSliderMin, option, widget));
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if (sb->orientation == Qt::Horizontal) {
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sz = QSize(sliderMin, extent);
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} else {
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sz = QSize(extent, sliderMin);
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}
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}
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}
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return sz;
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}
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int GtkProxyStyle::styleHint(StyleHint hint, const QStyleOption *option, const QWidget *widget, QStyleHintReturn *returnData) const
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{
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if (useOverlayScrollbars && SH_ScrollView_FrameOnlyAroundContents==hint) {
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return false;
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}
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return baseStyle()->styleHint(hint, option, widget, returnData);
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}
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int GtkProxyStyle::pixelMetric(PixelMetric metric, const QStyleOption *option, const QWidget *widget) const
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{
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if (useOverlayScrollbars && PM_ScrollBarExtent==metric) {
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return !thumb || isWebView(widget) ? sbarWebViewWidth : sbarWidth;
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}
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return baseStyle()->pixelMetric(metric, option, widget);
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}
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QRect GtkProxyStyle::subControlRect(ComplexControl control, const QStyleOptionComplex *option, SubControl subControl, const QWidget *widget) const
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{
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if (useOverlayScrollbars && CC_ScrollBar==control) {
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if (const QStyleOptionSlider *sb = qstyleoption_cast<const QStyleOptionSlider *>(option)) {
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QRect ret;
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bool horizontal(Qt::Horizontal==sb->orientation);
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int sbextent(pixelMetric(PM_ScrollBarExtent, sb, widget)),
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sliderMaxLength(horizontal ? sb->rect.width() : sb->rect.height()),
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sliderMinLength(pixelMetric(PM_ScrollBarSliderMin, sb, widget)),
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sliderLength;
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if (sb->maximum != sb->minimum) {
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uint valueRange = sb->maximum - sb->minimum;
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sliderLength = (sb->pageStep * sliderMaxLength) / (valueRange + sb->pageStep);
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if (sliderLength < sliderMinLength) {
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sliderLength = sliderMinLength;
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}
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if (sliderLength > sliderMaxLength) {
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sliderLength = sliderMaxLength;
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}
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} else {
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sliderLength = sliderMaxLength;
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}
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int sliderstart(sliderPositionFromValue(sb->minimum, sb->maximum, sb->sliderPosition, sliderMaxLength - sliderLength, sb->upsideDown));
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// Subcontrols
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switch(subControl)
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{
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case SC_ScrollBarSubLine:
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case SC_ScrollBarAddLine:
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return QRect();
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case SC_ScrollBarSubPage:
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if (horizontal) {
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ret.setRect(0, 0, sliderstart, sbextent);
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} else {
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ret.setRect(0, 0, sbextent, sliderstart);
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}
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break;
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case SC_ScrollBarAddPage:
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if (horizontal) {
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ret.setRect(sliderstart + sliderLength, 0, sliderMaxLength - sliderstart - sliderLength, sbextent);
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} else {
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ret.setRect(0, sliderstart + sliderLength, sbextent, sliderMaxLength - sliderstart - sliderLength);
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}
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break;
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case SC_ScrollBarGroove:
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if (horizontal) {
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ret=QRect(0, 0, sb->rect.width(), sb->rect.height());
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} else {
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ret=QRect(0, 0, sb->rect.width(), sb->rect.height());
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}
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break;
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case SC_ScrollBarSlider:
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if (horizontal) {
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ret=QRect(sliderstart, 0, sliderLength, sbextent);
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} else {
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ret=QRect(0, sliderstart, sbextent, sliderLength);
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}
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break;
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default:
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ret = baseStyle()->subControlRect(control, option, subControl, widget);
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break;
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}
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return visualRect(sb->direction/*Qt::LeftToRight*/, sb->rect, ret);
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}
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}
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return baseStyle()->subControlRect(control, option, subControl, widget);
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}
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static QPainterPath buildPath(const QRectF &r, double radius)
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{
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QPainterPath path;
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double diameter(radius*2);
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path.moveTo(r.x()+r.width(), r.y()+r.height()-radius);
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path.arcTo(r.x()+r.width()-diameter, r.y(), diameter, diameter, 0, 90);
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path.arcTo(r.x(), r.y(), diameter, diameter, 90, 90);
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path.arcTo(r.x(), r.y()+r.height()-diameter, diameter, diameter, 180, 90);
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path.arcTo(r.x()+r.width()-diameter, r.y()+r.height()-diameter, diameter, diameter, 270, 90);
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return path;
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}
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void GtkProxyStyle::drawComplexControl(ComplexControl control, const QStyleOptionComplex *option, QPainter *painter, const QWidget *widget) const
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{
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if (useOverlayScrollbars && CC_ScrollBar==control) {
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if (const QStyleOptionSlider *sb = qstyleoption_cast<const QStyleOptionSlider *>(option)) {
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QRect r=option->rect;
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QRect slider=subControlRect(control, option, SC_ScrollBarSlider, widget);
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painter->save();
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painter->fillRect(r, option->palette.base());
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bool webView=!thumb || isWebView(widget);
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if (webView) {
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QColor col=option->palette.foreground().color();
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col.setAlphaF(0.15);
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painter->setPen(col);
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if (Qt::Horizontal==sb->orientation) {
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painter->drawLine(r.x(), r.y(), r.x()+r.width()-1, r.y());
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} else if (Qt::RightToLeft==QApplication::layoutDirection()) {
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painter->drawLine(r.x()+r.width()-1, r.y(), r.x()+r.width()-1, r.y()+r.height()-1);
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} else {
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painter->drawLine(r.x(), r.y(), r.x(), r.y()+r.height()-1);
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}
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}
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if (slider.isValid()) {
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if (webView) {
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painter->setRenderHint(QPainter::Antialiasing, true);
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if (Qt::Horizontal==sb->orientation) {
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slider.adjust(0, 2, 0, -2);
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} else {
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slider.adjust(2, 0, -2, 0);
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}
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QPainterPath path=buildPath(QRectF(slider.x()+0.5, slider.y()+0.5, slider.width()-1, slider.height()-1),
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(Qt::Horizontal==sb->orientation ? r.height() : r.width())/4);
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QColor col(option->palette.highlight().color());
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if (option->state&State_Active && !(option->state&State_MouseOver)) {
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col.setAlphaF(0.75);
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}
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painter->fillPath(path, col);
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if (option->state&State_Active && !(option->state&State_MouseOver)) {
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col.setAlphaF(0.25);
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}
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painter->setPen(col);
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painter->drawPath(path);
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} else {
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QRect toThumb;
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if (thumb && thumbTarget && thumbTarget==widget && thumb->isVisible()) {
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QPoint p=thumbTarget->mapFromGlobal(thumb->pos())+QPoint(1, 1);
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if (Qt::Horizontal==sb->orientation) {
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if (p.x()<slider.x()) {
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toThumb=QRect(p.x(), slider.y(), slider.x()-p.x(), slider.width());
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} else if (p.x()>(slider.x()+slider.width())) {
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toThumb=QRect(slider.x()+slider.width(), slider.x(), p.x()-slider.y(), slider.width());
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}
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} else {
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if (p.y()<slider.y()) {
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toThumb=QRect(slider.x(), p.y(), slider.width(), slider.y()-p.y());
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} else if (p.y()>(slider.y()+slider.height())) {
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toThumb=QRect(slider.x(), slider.y()+slider.height(), slider.width(), p.y()-slider.y());
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}
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}
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}
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if (toThumb.isValid()) {
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QColor col(option->palette.text().color());
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col.setAlphaF(0.35);
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painter->fillRect(toThumb, col);
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}
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painter->fillRect(slider, option->palette.highlight().color());
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}
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}
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painter->restore();
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return;
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}
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}
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baseStyle()->drawComplexControl(control, option, painter, widget);
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}
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static inline void addEventFilter(QObject *object, QObject *filter)
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{
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object->removeEventFilter(filter);
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object->installEventFilter(filter);
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}
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void GtkProxyStyle::polish(QWidget *widget)
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{
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if (useOverlayScrollbars && thumb && widget && qobject_cast<QAbstractScrollArea *>(widget)) {
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addEventFilter(widget, this);
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widget->setAttribute(Qt::WA_Hover, true);
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} else if (useOverlayScrollbars && isWebView(widget)) {
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widget->setAttribute(Qt::WA_Hover, true);
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}
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baseStyle()->polish(widget);
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}
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void GtkProxyStyle::unpolish(QWidget *widget)
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{
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if (useOverlayScrollbars && thumb && widget) {
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if (qobject_cast<QAbstractScrollArea *>(widget)) {
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widget->removeEventFilter(this);
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}
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if (thumb && thumbTarget==widget) {
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thumb->hide();
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}
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}
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baseStyle()->unpolish(widget);
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}
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void GtkProxyStyle::destroySliderThumb()
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{
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if (thumb) {
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thumb->setVisible(false);
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thumb->deleteLater();
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thumb=0;
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}
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}
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bool GtkProxyStyle::eventFilter(QObject *object, QEvent *event)
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{
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if (useOverlayScrollbars && QEvent::HoverMove==event->type() && object && qobject_cast<QAbstractScrollArea *>(object)) {
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QHoverEvent *he=(QHoverEvent *)event;
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QAbstractScrollArea *a=(QAbstractScrollArea *)object;
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QScrollBar *bar=0;
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if (a->horizontalScrollBar() && a->horizontalScrollBar()->isVisible() && he->pos().y()>(a->height()-sbarAreaWidth)) {
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bar=a->horizontalScrollBar();
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}
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if (a->verticalScrollBar() && a->verticalScrollBar()->isVisible() && he->pos().x()>(a->width()-sbarAreaWidth)) {
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bar=a->verticalScrollBar();
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}
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if (bar) {
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if (thumbTarget!=bar) {
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if (thumbTarget) {
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disconnect(bar, SIGNAL(destroyed(QObject *)), this, SLOT(objectDestroyed(QObject *)));
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disconnect(thumb, SIGNAL(hidding()), thumbTarget, SLOT(update()));
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disconnect(thumb, SIGNAL(showing()), thumbTarget, SLOT(update()));
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}
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thumbTarget=bar;
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connect(bar, SIGNAL(destroyed(QObject *)), this, SLOT(objectDestroyed(QObject *)));
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connect(thumb, SIGNAL(hidding()), thumbTarget, SLOT(update()));
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connect(thumb, SIGNAL(showing()), thumbTarget, SLOT(update()));
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}
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thumb->setOrientation(bar->orientation());
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if (!thumb->isVisible()) {
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QPoint global=a->mapToGlobal(QPoint(Qt::Vertical==bar->orientation() ? a->width()-sbarWidth-1 : 0, Qt::Vertical==bar->orientation() ? 0 : a->height()-sbarWidth-1));
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int toXPos=global.x();
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int toYPos=global.y();
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if (Qt::Vertical==bar->orientation()) {
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int thumbSize = thumb->height();
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toYPos = a->mapToGlobal(he->pos()).y() - thumb->height() / 2;
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int minYPos = global.y();
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int maxYPos = global.y() + a->height() - thumbSize;
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thumb->setMaximum(maxYPos);
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thumb->setMinimum(minYPos);
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if (toYPos < minYPos) {
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toYPos = minYPos;
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}
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if (toYPos > maxYPos) {
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toYPos = maxYPos;
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}
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if (QApplication::desktop() && toXPos+thumb->width()>QApplication::desktop()->width()) {
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toXPos=global.x()-(thumb->width()-sbarWidth);
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}
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int sliderPos=sliderPositionFromValue(thumbTarget->minimum(), thumbTarget->maximum(), thumbTarget->value(), thumbTarget->height() - thumb->height());
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sliderOffset=toYPos-(global.y()+sliderPos);
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} else {
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int thumbSize = thumb->height();
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toXPos = a->mapToGlobal(he->pos()).x() - thumb->width() / 2;
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int minXPos = global.x();
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int maxXPos = global.x() + a->width() - thumbSize;
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thumb->setMaximum(maxXPos);
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thumb->setMinimum(minXPos);
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if (toXPos < minXPos) {
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toXPos = minXPos;
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}
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if (toXPos > maxXPos) {
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toXPos = maxXPos;
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}
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if (QApplication::desktop() && toYPos+thumb->height()>QApplication::desktop()->height()) {
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toYPos=global.y()-(thumb->height()-sbarWidth);
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}
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int sliderPos=sliderPositionFromValue(thumbTarget->minimum(), thumbTarget->maximum(), thumbTarget->value(), thumbTarget->width() - thumb->width());
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sliderOffset=toXPos-(global.x()+sliderPos);
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}
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thumb->move(toXPos, toYPos);
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thumb->show();
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}
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} else {
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thumb->hide();
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}
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} else if (useOverlayScrollbars && thumb && QEvent::WindowDeactivate==event->type() && thumb->isVisible()) {
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thumb->hide();
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}
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return baseStyle()->eventFilter(object, event);
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}
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void GtkProxyStyle::objectDestroyed(QObject *obj)
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{
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if (obj==thumbTarget) {
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disconnect(thumbTarget, SIGNAL(destroyed(QObject *)), this, SLOT(objectDestroyed(QObject *)));
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thumbTarget=0;
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}
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}
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void GtkProxyStyle::thumbMoved(const QPoint &point)
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{
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if (thumbTarget) {
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QPoint global=thumbTarget->mapToGlobal(QPoint(0, 0));
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int value=thumbTarget->value();
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if (Qt::Vertical==thumbTarget->orientation()) {
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thumbTarget->setValue(sliderValueFromPosition(thumbTarget->minimum(), thumbTarget->maximum(), point.y() - (global.y()+sliderOffset), thumbTarget->height() - thumb->height()));
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} else {
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thumbTarget->setValue(sliderValueFromPosition(thumbTarget->minimum(), thumbTarget->maximum(), point.x() - global.x(), thumbTarget->width() - thumb->width()));
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}
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if (value==thumbTarget->value()) {
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thumbTarget->update();
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}
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updateSliderOffset();
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}
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}
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void GtkProxyStyle::sbarPageUp()
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{
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if (thumbTarget) {
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thumbTarget->setValue(thumbTarget->value() - thumbTarget->pageStep());
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if (thumbTarget->value() < thumbTarget->minimum()) {
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thumbTarget->setValue(thumbTarget->minimum());
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}
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updateSliderOffset();
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}
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}
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void GtkProxyStyle::sbarPageDown()
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{
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if (thumbTarget) {
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thumbTarget->setValue(thumbTarget->value() + thumbTarget->pageStep());
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if (thumbTarget->value() > thumbTarget->maximum()) {
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thumbTarget->setValue(thumbTarget->maximum());
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}
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updateSliderOffset();
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}
|
|
}
|
|
|
|
void GtkProxyStyle::updateSliderOffset()
|
|
{
|
|
QPoint global=thumbTarget->mapToGlobal(QPoint(0, 0));
|
|
if (Qt::Vertical==thumbTarget->orientation()) {
|
|
int sliderPos=sliderPositionFromValue(thumbTarget->minimum(), thumbTarget->maximum(), thumbTarget->value(), thumbTarget->height() - thumb->height());
|
|
sliderOffset=thumb->pos().y()-(global.y()+sliderPos);
|
|
} else {
|
|
int sliderPos=sliderPositionFromValue(thumbTarget->minimum(), thumbTarget->maximum(), thumbTarget->value(), thumbTarget->width() - thumb->width());
|
|
sliderOffset=thumb->pos().x()-(global.x()+sliderPos);
|
|
}
|
|
}
|