comparison widgets/RangeInputDialog.cpp @ 188:dd573e090eed

* Add range input dialog
* Make Panner support middle-click/ctrl-left-click to reset and emit
  doubleClicked when doubleClicked instead of resetting
* Use range input dialog to enter new values for panner on double-click

+/* -*- 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 2007 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 "RangeInputDialog.h"
+
+#include <QDoubleSpinBox>
+#include <QGridLayout>
+#include <QLabel>
+#include <QHBoxLayout>
+#include <QPushButton>
+
+RangeInputDialog::RangeInputDialog(QString title, QString message,
+                                   QString unit, float min, float max, 
+                                   QWidget *parent) :
+    QDialog(parent)
+{
+    QGridLayout *grid = new QGridLayout;
+    setLayout(grid);
+
+    setWindowTitle(title);
+    
+    QLabel *messageLabel = new QLabel;
+    messageLabel->setText(message);
+    grid->addWidget(messageLabel, 0, 0, 1, 5);
+
+    m_rangeStart = new QDoubleSpinBox;
+    m_rangeStart->setDecimals(4);
+    m_rangeStart->setMinimum(min);
+    m_rangeStart->setMaximum(max);
+    m_rangeStart->setSuffix(unit);
+    grid->addWidget(m_rangeStart, 1, 1);
+    connect(m_rangeStart, SIGNAL(valueChanged(double)),
+            this, SLOT(rangeStartChanged(double)));
+    
+    grid->addWidget(new QLabel(tr(" to ")), 1, 2);
+
+    m_rangeEnd = new QDoubleSpinBox;
+    m_rangeEnd->setDecimals(4);
+    m_rangeEnd->setMinimum(min);
+    m_rangeEnd->setMaximum(max);
+    m_rangeEnd->setSuffix(unit);
+    grid->addWidget(m_rangeEnd, 1, 3);
+    connect(m_rangeEnd, SIGNAL(valueChanged(double)),
+            this, SLOT(rangeEndChanged(double)));
+
+    QHBoxLayout *hbox = new QHBoxLayout;
+    grid->addLayout(hbox, 2, 0, 1, 5);
+
+    QPushButton *ok = new QPushButton(tr("OK"), this);
+    ok->setDefault(true);
+
+    QPushButton *cancel = new QPushButton(tr("Cancel"), this);
+
+    QSize bs = ok->sizeHint().expandedTo(cancel->sizeHint());
+    ok->setFixedSize(bs);
+    cancel->setFixedSize(bs);
+
+    hbox->addStretch();
+    hbox->addWidget(ok);
+    hbox->addWidget(cancel);
+
+    QObject::connect(ok, SIGNAL(clicked()), this, SLOT(accept()));
+    QObject::connect(cancel, SIGNAL(clicked()), this, SLOT(reject()));
+}
+
+RangeInputDialog::~RangeInputDialog()
+{
+}
+
+void
+RangeInputDialog::getRange(float &min, float &max)
+{
+    min = float(m_rangeStart->value());
+    max = float(m_rangeEnd->value());
+
+    if (min > max) {
+        float tmp = min;
+        min = max;
+        max = tmp;
+    }
+}
+
+void
+RangeInputDialog::setRange(float start, float end)
+{
+    if (start > end) {
+        float tmp = start;
+        start = end;
+        end = tmp;
+    }
+
+    blockSignals(true);
+    m_rangeStart->setValue(start);
+    m_rangeEnd->setValue(end);
+    blockSignals(false);
+}
+
+void
+RangeInputDialog::rangeStartChanged(double min)
+{
+    double max = m_rangeEnd->value();
+    if (min > max) {
+        double tmp = min;
+        min = max;
+        max = tmp;
+    }
+    emit rangeChanged(float(min), float(max));
+}
+
+
+void
+RangeInputDialog::rangeEndChanged(double max)
+{
+    double min = m_rangeStart->value();
+    if (min > max) {
+        double tmp = min;
+        min = max;
+        max = tmp;
+    }
+    emit rangeChanged(float(min), float(max));
+}
+