view widgets/PaneStack.cpp @ 11:2d5005f2b3d9

* Rework handling of layer properties in file I/O -- we now get the individual
  layers to load and save them rather than doing it via generic property lists
  in the base class, so as to ensure we read and write meaningful values rather
  than generic int values requiring conversion.

/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */

/*
    A waveform viewer and audio annotation editor.
    Chris Cannam, Queen Mary University of London, 2005-2006
    
    This is experimental software.  Not for distribution.
*/

#include "PaneStack.h"

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

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

#include <iostream>

PaneStack::PaneStack(QWidget *parent, ViewManager *viewManager) :
    QSplitter(parent),
    m_currentPane(0),
    m_viewManager(viewManager)
{
    setOrientation(Qt::Vertical);
    setOpaqueResize(false);
}

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);
    m_currentIndicators.push_back(currentIndicator);

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

    QWidget *properties = 0;
    if (suppressPropertyBox) {
	properties = new QFrame();
    } else {
	properties = new PropertyStack(frame, pane);
	connect(properties, SIGNAL(propertyContainerSelected(PropertyContainer *)),
		this, SLOT(propertyContainerSelected(PropertyContainer *)));
    }
    layout->addWidget(properties);
    layout->setStretchFactor(properties, 1);
    m_propertyStacks.push_back(properties);

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

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

    return pane;
}

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

void
PaneStack::deletePane(Pane *pane)
{
    int n = 0;
    std::vector<Pane *>::iterator i = m_panes.begin();
    std::vector<QWidget *>::iterator j = m_propertyStacks.begin();
    std::vector<QLabel *>::iterator k = m_currentIndicators.begin();

    while (i != m_panes.end()) {
	if (*i == pane) break;
	++i;
	++j;
	++k;
	++n;
    }
    if (n >= int(m_panes.size())) return;

    m_panes.erase(i);
    m_propertyStacks.erase(j);
    m_currentIndicators.erase(k);
    delete widget(n);

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

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

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

    while (i != m_panes.end()) {
	if (*i == pane) {
	    (*k)->setPixmap(selectedMap);
	} else {
	    (*k)->setPixmap(unselectedMap);
	}
	++i;
	++k;
    }
    m_currentPane = pane;

    emit currentPaneChanged(m_currentPane);
}

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

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

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

void
PaneStack::propertyContainerSelected(PropertyContainer *pc)
{
    std::vector<Pane *>::iterator i = m_panes.begin();
    std::vector<QWidget *>::iterator j = m_propertyStacks.begin();

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

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

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

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

	if (m_propertyStacks[i]->minimumSizeHint().width() > maxMinWidth) {
	    maxMinWidth = m_propertyStacks[i]->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

    for (unsigned int i = 0; i < m_propertyStacks.size(); ++i) {
	if (!m_propertyStacks[i]) continue;
	m_propertyStacks[i]->setMinimumWidth(setWidth);
    }
}
    

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