view view/PaneStack.cpp @ 190:53835534a9d3

* Allow user to activate a pane by clicking on the tab for its currently active
  layer.  Formerly nothing happened if you clicked on the tab that was already
  topmost in a given property stack, because the tab widget only emitted a signal
  if the current tab changed.  We want this to switch focus back to the pane if
  another one has been active in the mean time.
* Make the thumbwheels look a bit round.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam and QMUL.
    
    This program 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; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "PaneStack.h"

#include "Pane.h"
#include "widgets/PropertyStack.h"
#include "layer/Layer.h"
#include "ViewManager.h"

#include <QApplication>
#include <QHBoxLayout>
#include <QPainter>
#include <QPalette>
#include <QLabel>
#include <QSplitter>
#include <QStackedWidget>

#include <iostream>

PaneStack::PaneStack(QWidget *parent, ViewManager *viewManager) :
    QFrame(parent),
    m_currentPane(0),
    m_splitter(new QSplitter),
    m_propertyStackStack(new QStackedWidget),
    m_viewManager(viewManager),
    m_layoutStyle(PropertyStackPerPaneLayout)
{
    QHBoxLayout *layout = new QHBoxLayout;
    layout->setMargin(0);
    layout->setSpacing(0);

    m_splitter->setOrientation(Qt::Vertical);
    m_splitter->setOpaqueResize(false);

    layout->addWidget(m_splitter);
    layout->setStretchFactor(m_splitter, 1);
    layout->addWidget(m_propertyStackStack);
    m_propertyStackStack->hide();

    setLayout(layout);
}

Pane *
PaneStack::addPane(bool suppressPropertyBox)
{
    QFrame *frame = new QFrame;
    QHBoxLayout *layout = new QHBoxLayout;
    layout->setMargin(0);
    layout->setSpacing(2);

    QLabel *currentIndicator = new QLabel(frame);
    currentIndicator->setFixedWidth(QPainter(this).fontMetrics().width("x"));
    layout->addWidget(currentIndicator);
    layout->setStretchFactor(currentIndicator, 1);
    currentIndicator->setScaledContents(true);

    Pane *pane = new Pane(frame);
    pane->setViewManager(m_viewManager);
    layout->addWidget(pane);
    layout->setStretchFactor(pane, 10);

    QWidget *properties = 0;
    if (suppressPropertyBox) {
	properties = new QFrame();
    } else {
	properties = new PropertyStack(frame, pane);
	connect(properties, SIGNAL(propertyContainerSelected(View *, PropertyContainer *)),
		this, SLOT(propertyContainerSelected(View *, PropertyContainer *)));
        connect(properties, SIGNAL(viewSelected(View  *)),
                this, SLOT(viewSelected(View *)));
        connect(properties, SIGNAL(contextHelpChanged(const QString &)),
                this, SIGNAL(contextHelpChanged(const QString &)));
    }
    if (m_layoutStyle == PropertyStackPerPaneLayout) {
        layout->addWidget(properties);
    } else {
        properties->setParent(m_propertyStackStack);
        m_propertyStackStack->addWidget(properties);
    }
    layout->setStretchFactor(properties, 1);

    PaneRec rec;
    rec.pane = pane;
    rec.propertyStack = properties;
    rec.currentIndicator = currentIndicator;
    rec.frame = frame;
    rec.layout = layout;
    m_panes.push_back(rec);

    frame->setLayout(layout);
    m_splitter->addWidget(frame);

    connect(pane, SIGNAL(propertyContainerAdded(PropertyContainer *)),
	    this, SLOT(propertyContainerAdded(PropertyContainer *)));
    connect(pane, SIGNAL(propertyContainerRemoved(PropertyContainer *)),
	    this, SLOT(propertyContainerRemoved(PropertyContainer *)));
    connect(pane, SIGNAL(paneInteractedWith()),
	    this, SLOT(paneInteractedWith()));
    connect(pane, SIGNAL(rightButtonMenuRequested(QPoint)),
            this, SLOT(rightButtonMenuRequested(QPoint)));

    if (!m_currentPane) {
	setCurrentPane(pane);
    }

    return pane;
}

void
PaneStack::setLayoutStyle(LayoutStyle style)
{
    if (style == m_layoutStyle) return;
    m_layoutStyle = style;

    std::vector<PaneRec>::iterator i;

    switch (style) {

    case NoPropertyStacks:
    case SinglePropertyStackLayout:
        
        for (i = m_panes.begin(); i != m_panes.end(); ++i) {
            i->layout->removeWidget(i->propertyStack);
            i->propertyStack->setParent(m_propertyStackStack);
            m_propertyStackStack->addWidget(i->propertyStack);
        }
        m_propertyStackStack->setVisible(style != NoPropertyStacks);
        break;

    case PropertyStackPerPaneLayout:

        for (i = m_panes.begin(); i != m_panes.end(); ++i) {
            m_propertyStackStack->removeWidget(i->propertyStack);
            i->propertyStack->setParent(i->frame);
            i->layout->addWidget(i->propertyStack);
            i->propertyStack->show();
        }
        m_propertyStackStack->hide();
        break;
    }
}

Pane *
PaneStack::getPane(int n)
{
    return m_panes[n].pane;
}

Pane *
PaneStack::getHiddenPane(int n)
{
    return m_hiddenPanes[n].pane;
}

void
PaneStack::deletePane(Pane *pane)
{
    std::vector<PaneRec>::iterator i;
    bool found = false;

    for (i = m_panes.begin(); i != m_panes.end(); ++i) {
	if (i->pane == pane) {
	    m_panes.erase(i);
	    found = true;
	    break;
	}
    }

    if (!found) {

	for (i = m_hiddenPanes.begin(); i != m_hiddenPanes.end(); ++i) {
	    if (i->pane == pane) {
		m_hiddenPanes.erase(i);
		found = true;
		break;
	    }
	}

	if (!found) {
	    std::cerr << "WARNING: PaneStack::deletePane(" << pane << "): Pane not found in visible or hidden panes, not deleting" << std::endl;
	    return;
	}
    }

    delete pane->parent();

    if (m_currentPane == pane) {
	if (m_panes.size() > 0) {
            setCurrentPane(m_panes[0].pane);
	} else {
	    setCurrentPane(0);
	}
    }
}

int
PaneStack::getPaneCount() const
{
    return m_panes.size();
}

int
PaneStack::getHiddenPaneCount() const
{
    return m_hiddenPanes.size();
}

void
PaneStack::hidePane(Pane *pane)
{
    std::vector<PaneRec>::iterator i = m_panes.begin();

    while (i != m_panes.end()) {
	if (i->pane == pane) {

	    m_hiddenPanes.push_back(*i);
	    m_panes.erase(i);

	    QWidget *pw = dynamic_cast<QWidget *>(pane->parent());
	    if (pw) pw->hide();

	    if (m_currentPane == pane) {
		if (m_panes.size() > 0) {
		    setCurrentPane(m_panes[0].pane);
		} else {
		    setCurrentPane(0);
		}
	    }
	    
	    return;
	}
	++i;
    }

    std::cerr << "WARNING: PaneStack::hidePane(" << pane << "): Pane not found in visible panes" << std::endl;
}

void
PaneStack::showPane(Pane *pane)
{
    std::vector<PaneRec>::iterator i = m_hiddenPanes.begin();

    while (i != m_hiddenPanes.end()) {
	if (i->pane == pane) {
	    m_panes.push_back(*i);
	    m_hiddenPanes.erase(i);
	    QWidget *pw = dynamic_cast<QWidget *>(pane->parent());
	    if (pw) pw->show();

	    //!!! update current pane

	    return;
	}
	++i;
    }

    std::cerr << "WARNING: PaneStack::showPane(" << pane << "): Pane not found in hidden panes" << std::endl;
}

void
PaneStack::setCurrentPane(Pane *pane) // may be null
{
    if (m_currentPane == pane) return;
    
    std::vector<PaneRec>::iterator i = m_panes.begin();

    // We used to do this by setting the foreground and background
    // role, but it seems the background role is ignored and the
    // background drawn transparent in Qt 4.1 -- I can't quite see why
    
    QPixmap selectedMap(1, 1);
    selectedMap.fill(QApplication::palette().color(QPalette::Foreground));
    
    QPixmap unselectedMap(1, 1);
    unselectedMap.fill(QApplication::palette().color(QPalette::Background));

    bool found = false;

    while (i != m_panes.end()) {
	if (i->pane == pane) {
	    i->currentIndicator->setPixmap(selectedMap);
            if (m_layoutStyle != PropertyStackPerPaneLayout) {
                m_propertyStackStack->setCurrentWidget(i->propertyStack);
            }
	    found = true;
	} else {
	    i->currentIndicator->setPixmap(unselectedMap);
	}
	++i;
    }

    if (found || pane == 0) {
	m_currentPane = pane;
	emit currentPaneChanged(m_currentPane);
    } else {
	std::cerr << "WARNING: PaneStack::setCurrentPane(" << pane << "): pane is not a visible pane in this stack" << std::endl;
    }
}

void
PaneStack::setCurrentLayer(Pane *pane, Layer *layer) // may be null
{
    setCurrentPane(pane);

    if (m_currentPane) {

	std::vector<PaneRec>::iterator i = m_panes.begin();

	while (i != m_panes.end()) {

	    if (i->pane == pane) {
		PropertyStack *stack = dynamic_cast<PropertyStack *>
		    (i->propertyStack);
		if (stack) {
		    if (stack->containsContainer(layer)) {
			stack->setCurrentIndex(stack->getContainerIndex(layer));
			emit currentLayerChanged(pane, layer);
		    } else {
			stack->setCurrentIndex
			    (stack->getContainerIndex
			     (pane->getPropertyContainer(0)));
			emit currentLayerChanged(pane, 0);
		    }
		}
		break;
	    }
	    ++i;
	}
    }
}

Pane *
PaneStack::getCurrentPane() 
{
    return m_currentPane;
}

void
PaneStack::propertyContainerAdded(PropertyContainer *)
{
    sizePropertyStacks();
}

void
PaneStack::propertyContainerRemoved(PropertyContainer *)
{
    sizePropertyStacks();
}

void
PaneStack::propertyContainerSelected(View *client, PropertyContainer *pc)
{
    std::vector<PaneRec>::iterator i = m_panes.begin();

    while (i != m_panes.end()) {
	PropertyStack *stack = dynamic_cast<PropertyStack *>(i->propertyStack);
	if (stack &&
	    stack->getClient() == client &&
	    stack->containsContainer(pc)) {
	    setCurrentPane(i->pane);
	    break;
	}
	++i;
    }

    Layer *layer = dynamic_cast<Layer *>(pc);
    if (layer) emit currentLayerChanged(m_currentPane, layer);
    else emit currentLayerChanged(m_currentPane, 0);
}

void
PaneStack::viewSelected(View *v)
{
    Pane *p = dynamic_cast<Pane *>(v);
    if (p) setCurrentPane(p);
}

void
PaneStack::paneInteractedWith()
{
    Pane *pane = dynamic_cast<Pane *>(sender());
    if (!pane) return;
    setCurrentPane(pane);
}

void
PaneStack::rightButtonMenuRequested(QPoint position)
{
    Pane *pane = dynamic_cast<Pane *>(sender());
    if (!pane) return;
    emit rightButtonMenuRequested(pane, position);
}

void
PaneStack::sizePropertyStacks()
{
    int maxMinWidth = 0;

    for (size_t i = 0; i < m_panes.size(); ++i) {
	if (!m_panes[i].propertyStack) continue;
//	std::cerr << "PaneStack::sizePropertyStacks: " << i << ": min " 
//		  << m_panes[i].propertyStack->minimumSizeHint().width() << ", current "
//		  << m_panes[i].propertyStack->width() << std::endl;

	if (m_panes[i].propertyStack->minimumSizeHint().width() > maxMinWidth) {
	    maxMinWidth = m_panes[i].propertyStack->minimumSizeHint().width();
	}
    }

//    std::cerr << "PaneStack::sizePropertyStacks: max min width " << maxMinWidth << std::endl;

#ifdef Q_WS_MAC
    // This is necessary to compensate for cb->setMinimumSize(10, 10)
    // in PropertyBox in the Mac version (to avoid a mysterious crash)
    int setWidth = maxMinWidth * 3 / 2;
#else
    int setWidth = maxMinWidth;
#endif

    m_propertyStackStack->setMaximumWidth(setWidth + 10);

    for (size_t i = 0; i < m_panes.size(); ++i) {
	if (!m_panes[i].propertyStack) continue;
	m_panes[i].propertyStack->setMinimumWidth(setWidth);
    }

    emit propertyStacksResized();
}
    

#ifdef INCLUDE_MOCFILES
#include "PaneStack.moc.cpp"
#endif