annotate multichoicedialog.cpp @ 109:1721c580c10e

* Add a queueing mechanism for Hg actions, instead of refusing to start an action if something else is already happening.  This is essential now that actions can be prompted by asynchronous events (e.g. filesystem watcher).
 * Make Revert behave sensibly

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

/*
    EasyMercurial

    Based on HgExplorer by Jari Korhonen
    Copyright (c) 2010 Jari Korhonen
    Copyright (c) 2010 Chris Cannam
    Copyright (c) 2010 Queen Mary, University of London

    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 "multichoicedialog.h"

#include "selectablelabel.h"

#include "debug.h"

#include <QDialogButtonBox>
#include <QToolButton>
#include <QPushButton>
#include <QFont>
#include <QDir>
#include <QFileDialog>
#include <QUrl>

MultiChoiceDialog::MultiChoiceDialog(QString title, QString heading, QWidget *parent) :
    QDialog(parent)
{
    setModal(true);
    setWindowTitle(title);

    QGridLayout *outer = new QGridLayout;
    setLayout(outer);

    outer->addWidget(new QLabel(heading), 0, 0, 1, 3);

    QWidget *innerWidget = new QWidget;
    outer->addWidget(innerWidget, 1, 0, 1, 3);
    m_choiceLayout = new QHBoxLayout;
    innerWidget->setLayout(m_choiceLayout);

    m_descriptionLabel = new QLabel;
    outer->addWidget(m_descriptionLabel, 2, 0, 1, 3);

    QFont f = m_descriptionLabel->font();
    f.setPointSize(f.pointSize() * 0.9);
    m_descriptionLabel->setFont(f);

    m_urlLabel = new QLabel(tr("&URL:"));
    outer->addWidget(m_urlLabel, 3, 0);

    m_urlCombo = new QComboBox();
    m_urlCombo->setEditable(true);
    m_urlLabel->setBuddy(m_urlCombo);
    connect(m_urlCombo, SIGNAL(editTextChanged(const QString &)),
            this, SLOT(urlChanged(const QString &)));
    outer->addWidget(m_urlCombo, 3, 1, 1, 2);

    m_fileLabel = new QLabel(tr("&File:"));
    outer->addWidget(m_fileLabel, 4, 0);

    m_fileCombo = new QComboBox();
    m_fileCombo->setEditable(true);
    m_fileLabel->setBuddy(m_fileCombo);
    connect(m_fileCombo, SIGNAL(editTextChanged(const QString &)),
            this, SLOT(fileChanged(const QString &)));
    outer->addWidget(m_fileCombo, 4, 1);
    outer->setColumnStretch(1, 20);

    m_browseButton = new QPushButton(tr("Browse..."));
    outer->addWidget(m_browseButton, 4, 2);
    connect(m_browseButton, SIGNAL(clicked()), this, SLOT(browse()));

    QDialogButtonBox *bbox = new QDialogButtonBox(QDialogButtonBox::Ok |
                                                  QDialogButtonBox::Cancel);
    connect(bbox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(bbox, SIGNAL(rejected()), this, SLOT(reject()));
    outer->addWidget(bbox, 5, 0, 1, 3);

    m_okButton = bbox->button(QDialogButtonBox::Ok);
    m_okButton->setEnabled(false);

    setMinimumWidth(480);
}

QString
MultiChoiceDialog::getCurrentChoice()
{
    return m_currentChoice;
}

void
MultiChoiceDialog::setCurrentChoice(QString c)
{
    m_currentChoice = c;
    choiceChanged();
}

QString
MultiChoiceDialog::getArgument()
{
    if (m_argTypes[m_currentChoice] == UrlArg ||
        m_argTypes[m_currentChoice] == UrlToDirectoryArg) {
        return m_urlCombo->currentText();
    } else {
        return m_fileCombo->currentText();
    }
}

QString
MultiChoiceDialog::getAdditionalArgument()
{
    if (m_argTypes[m_currentChoice] == UrlToDirectoryArg) {
        return m_fileCombo->currentText();
    } else {
        return "";
    }
}

void
MultiChoiceDialog::addRecentArgument(QString id, QString arg,
                                     bool additionalArgument)
{
    if (additionalArgument) {
        RecentFiles(QString("Recent-%1-add").arg(id)).addFile(arg);
    } else {
        RecentFiles(QString("Recent-%1").arg(id)).addFile(arg);
    }
}

void
MultiChoiceDialog::addChoice(QString id, QString text,
                             QString description, ArgType arg)
{
    bool first = (m_texts.empty());

    m_texts[id] = text;
    m_descriptions[id] = description;
    m_argTypes[id] = arg;
    
    if (arg != NoArg) {
        m_recentFiles[id] = QSharedPointer<RecentFiles>
            (new RecentFiles(QString("Recent-%1").arg(id)));
    }

    SelectableLabel *cb = new SelectableLabel;
    cb->setSelectedText(text);
    cb->setUnselectedText(text);

    m_choiceLayout->addWidget(cb);
    m_choiceButtons[cb] = id;

    connect(cb, SIGNAL(selectionChanged()), this, SLOT(choiceChanged()));

    if (first) {
        m_currentChoice = id;
        choiceChanged();
    }
}

void
MultiChoiceDialog::browse()
{
    QString origin = getArgument();

    if (origin == "") {
#ifdef Q_OS_WIN32
        origin = "c:";
#else
        origin = QDir::homePath();
#endif
    }

    QString path = origin;

    if (m_argTypes[m_currentChoice] == DirectoryArg ||
        m_argTypes[m_currentChoice] == UrlToDirectoryArg) {

        path = QFileDialog::getExistingDirectory
            (this, tr("Open Directory"), origin,
             QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
        if (path != QString()) {
            m_fileCombo->lineEdit()->setText(path + QDir::separator());
        }

    } else {

        path = QFileDialog::getOpenFileName
            (this, tr("Open File"), origin);
        if (path != QString()) {
            m_fileCombo->lineEdit()->setText(path);
        }
    }
}

void
MultiChoiceDialog::urlChanged(const QString &s)
{
/* This doesn't work well
    if (m_argTypes[m_currentChoice] != UrlToDirectoryArg) {
        return;
    }
    QDir dirPath(m_fileCombo->currentText());
    if (!dirPath.exists()) {
        if (!dirPath.cdUp()) return;
    }
    QString url = m_urlCombo->currentText();
    if (QRegExp("^\\w+://").indexIn(url) < 0) {
        return;
    }
    QString urlDirName = url;
    urlDirName.replace(QRegExp("^.*\\//.*\\/"), "");
    if (urlDirName == "" || urlDirName == url) {
        return;
    }
    m_fileCombo->lineEdit()->setText(dirPath.filePath(urlDirName));
*/
    if (m_argTypes[m_currentChoice] == UrlToDirectoryArg) {
        m_okButton->setEnabled(getArgument() != "" &&
                               getAdditionalArgument() != "");
    } else {
        m_okButton->setEnabled(getArgument() != "");
    }
}

void
MultiChoiceDialog::fileChanged(const QString &s)
{
    if (m_argTypes[m_currentChoice] == UrlToDirectoryArg) {
        m_okButton->setEnabled(getArgument() != "" &&
                               getAdditionalArgument() != "");
    } else {
        m_okButton->setEnabled(getArgument() != "");
    }
}

void
MultiChoiceDialog::choiceChanged()
{
    DEBUG << "choiceChanged" << endl;

    if (m_choiceButtons.empty()) return;

    QString id = "";

    QObject *s = sender();
    QWidget *w = qobject_cast<QWidget *>(s);
    if (w) id = m_choiceButtons[w];

    if (id == m_currentChoice) return;
    if (id == "") {
        // Happens when this is called for the very first time, when
        // m_currentChoice has been set to the intended ID but no
        // button has actually been pressed -- then we need to
        // initialise
        id = m_currentChoice;
    }

    m_currentChoice = id;

    foreach (QWidget *cw, m_choiceButtons.keys()) {
        SelectableLabel *sl = qobject_cast<SelectableLabel *>(cw);
        if (sl) {
            sl->setSelected(m_choiceButtons[cw] == id);
        }
    }

    m_descriptionLabel->setText(m_descriptions[id]);

    m_fileLabel->hide();
    m_fileCombo->hide();
    m_browseButton->hide();
    m_urlLabel->hide();
    m_urlCombo->hide();

    QSharedPointer<RecentFiles> rf = m_recentFiles[id];
    m_fileCombo->clear();
    m_urlCombo->clear();

    switch (m_argTypes[id]) {
        
    case NoArg:
        break;

    case FileArg:
        m_fileLabel->setText(tr("&File:"));
        m_fileLabel->show();
        m_fileCombo->show();
        m_fileCombo->addItems(rf->getRecent());
        m_browseButton->show();
        break;

    case DirectoryArg:
        m_fileLabel->setText(tr("&Folder:"));
        m_fileLabel->show();
        m_fileCombo->show();
        m_fileCombo->addItems(rf->getRecent());
        m_browseButton->show();
        break;

    case UrlArg:
        m_urlLabel->show();
        m_urlCombo->show();
        break;

    case UrlToDirectoryArg:
        m_urlLabel->show();
        m_urlCombo->show();
        m_urlCombo->addItems(rf->getRecent());
        m_fileLabel->setText(tr("&Folder:"));
        m_fileLabel->show();
        m_fileCombo->show();
        m_fileCombo->lineEdit()->setText(QDir::homePath());
        m_browseButton->show();
        break;
    }

    adjustSize();
}