mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-11-03 21:40:52 -05:00
329 lines
9.7 KiB
C++
329 lines
9.7 KiB
C++
#include "WFPalette.hpp"
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#include <stdexcept>
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#include <memory>
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#include <algorithm>
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#include <QMetaType>
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#include <QObject>
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#include <QFile>
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#include <QTextStream>
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#include <QString>
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#include <QDialog>
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#include <QTableWidget>
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#include <QTableWidgetItem>
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#include <QColorDialog>
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#include <QColor>
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#include <QBrush>
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#include <QPoint>
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#include <QMenu>
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#include <QAction>
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#include <QPushButton>
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#include <QStandardPaths>
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#include <QFileDialog>
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#include <QFile>
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#include <QTextStream>
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#include <QDebug>
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#include "qt_helpers.hpp"
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#include "ui_wf_palette_design_dialog.h"
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namespace
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{
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int constexpr points {256};
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using Colours = WFPalette::Colours;
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// ensure that palette colours are useable for interpolation
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Colours make_valid (Colours colours)
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{
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if (colours.size () < 2)
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{
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// allow single element by starting at black
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colours.prepend (QColor {0, 0, 0});
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}
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if (1 == colours.size ())
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{
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// allow empty list by using black to white
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colours.append (QColor {255,255,255});
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}
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if (colours.size () > points)
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{
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throw_qstring (QObject::tr ("Too many colours in palette."));
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}
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return colours;
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}
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// load palette colours from a file
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Colours load_palette (QString const& file_name)
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{
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Colours colours;
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QFile file {file_name};
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if (file.open (QIODevice::ReadOnly))
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{
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unsigned count {0};
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QTextStream in (&file);
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int line_counter {0};
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while (!in.atEnd ())
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{
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auto line = in.readLine();
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++line_counter;
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if (++count >= points)
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{
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throw_qstring (QObject::tr ("Error reading waterfall palette file \"%1:%2\" too many colors.")
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.arg (file.fileName ()).arg (line_counter));
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}
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auto items = line.split (';');
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if (items.size () != 3)
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{
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throw_qstring (QObject::tr ("Error reading waterfall palette file \"%1:%2\" invalid triplet.")
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.arg (file.fileName ()).arg (line_counter));
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}
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bool r_ok, g_ok, b_ok;
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auto r = items[0].toInt (&r_ok);
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auto g = items[1].toInt (&g_ok);
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auto b = items[2].toInt (&b_ok);
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if (!r_ok || !g_ok || !b_ok
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|| r < 0 || r > 255
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|| g < 0 || g > 255
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|| b < 0 || b > 255)
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{
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throw_qstring (QObject::tr ("Error reading waterfall palette file \"%1:%2\" invalid color.")
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.arg (file.fileName ()).arg (line_counter));
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}
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colours.append (QColor {r, g, b});
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}
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}
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else
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{
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throw_qstring (QObject::tr ("Error opening waterfall palette file \"%1\": %2.").arg (file.fileName ()).arg (file.errorString ()));
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}
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return colours;
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}
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// GUI to design and manage waterfall palettes
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class Designer
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: public QDialog
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{
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Q_OBJECT;
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public:
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explicit Designer (Colours const& current, QWidget * parent = nullptr)
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: QDialog {parent}
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, colours_ {current}
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{
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ui_.setupUi (this);
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// context menu actions
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auto import_button = ui_.button_box->addButton ("&Import...", QDialogButtonBox::ActionRole);
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connect (import_button, &QPushButton::clicked, this, &Designer::import_palette);
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auto export_button = ui_.button_box->addButton ("&Export...", QDialogButtonBox::ActionRole);
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connect (export_button, &QPushButton::clicked, this, &Designer::export_palette);
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// hookup the context menu handler
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connect (ui_.colour_table_widget, &QWidget::customContextMenuRequested, this, &Designer::context_menu);
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load_table ();
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}
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void load_table ()
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{
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// load the table items
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ui_.colour_table_widget->clear ();
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ui_.colour_table_widget->setRowCount (colours_.size ());
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for (int i {0}; i < colours_.size (); ++i)
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{
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insert_item (i);
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}
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}
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Colours colours () const
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{
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return colours_;
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}
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// invoke the colour editor
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Q_SLOT void on_colour_table_widget_itemDoubleClicked (QTableWidgetItem * item)
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{
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auto new_colour = QColorDialog::getColor (item->background ().color (), this);
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if (new_colour.isValid ())
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{
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item->setBackground (QBrush {new_colour});
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colours_[item->row ()] = new_colour;
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}
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}
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private:
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void insert_item (int row)
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{
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std::unique_ptr<QTableWidgetItem> item {new QTableWidgetItem {""}};
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item->setBackground (QBrush {colours_[row]});
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item->setFlags (Qt::ItemIsEnabled);
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ui_.colour_table_widget->setItem (row, 0, item.release ());
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}
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void insert_new_item (int row, QColor const& default_colour)
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{
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// use the prior row colour as default if available
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auto new_colour = QColorDialog::getColor (row > 0 ? colours_[row - 1] : default_colour, this);
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if (new_colour.isValid ())
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{
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ui_.colour_table_widget->insertRow (row);
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colours_.insert (row, new_colour);
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insert_item (row);
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}
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}
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void context_menu (QPoint const& p)
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{
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context_menu_.clear ();
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if (ui_.colour_table_widget->itemAt (p))
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{
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auto delete_action = context_menu_.addAction (tr ("&Delete"));
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connect (delete_action, &QAction::triggered, [this] ()
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{
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auto row = ui_.colour_table_widget->currentRow ();
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ui_.colour_table_widget->removeRow (row);
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colours_.removeAt (row);
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});
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}
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auto insert_action = context_menu_.addAction (tr ("&Insert ..."));
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connect (insert_action, &QAction::triggered, [this] ()
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{
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auto item = ui_.colour_table_widget->itemAt (menu_pos_);
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int row = item ? item->row () : colours_.size ();
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insert_new_item (row, QColor {0, 0, 0});
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});
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auto insert_after_action = context_menu_.addAction (tr ("Insert &after ..."));
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connect (insert_after_action, &QAction::triggered, [this] ()
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{
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auto item = ui_.colour_table_widget->itemAt (menu_pos_);
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int row = item ? item->row () + 1 : colours_.size ();
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insert_new_item( row, QColor {255, 255, 255});
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});
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menu_pos_ = p; // save for context menu action handlers
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context_menu_.popup (ui_.colour_table_widget->mapToGlobal (p));
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}
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void import_palette ()
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{
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auto docs = QStandardPaths::writableLocation (QStandardPaths::DocumentsLocation);
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auto file_name = QFileDialog::getOpenFileName (this, tr ("Import Palette"), docs, tr ("Palettes (*.pal)"));
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if (!file_name.isEmpty ())
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{
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colours_ = load_palette (file_name);
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load_table ();
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}
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}
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void export_palette ()
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{
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auto docs = QStandardPaths::writableLocation (QStandardPaths::DocumentsLocation);
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auto file_name = QFileDialog::getSaveFileName (this, tr ("Export Palette"), docs, tr ("Palettes (*.pal)"));
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if (!file_name.isEmpty ())
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{
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if (!QFile::exists (file_name) && !file_name.contains ('.'))
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{
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file_name += ".pal";
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}
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QFile file {file_name};
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if (file.open (QFile::WriteOnly | QFile::Truncate | QFile::Text))
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{
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QTextStream stream {&file};
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Q_FOREACH (auto colour, colours_)
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{
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stream << colour.red () << ';' << colour.green () << ';' << colour.blue () <<
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#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
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endl
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#else
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Qt::endl
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#endif
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;
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}
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}
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else
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{
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throw_qstring (QObject::tr ("Error writing waterfall palette file \"%1\": %2.").arg (file.fileName ()).arg (file.errorString ()));
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}
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}
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}
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Ui::wf_palette_design_dialog ui_;
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Colours colours_;
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QMenu context_menu_;
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QPoint menu_pos_;
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};
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}
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#include "WFPalette.moc"
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WFPalette::WFPalette (QString const& file_path)
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: colours_ {load_palette (file_path)}
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{
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}
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WFPalette::WFPalette (QList<QColor> const& colour_list)
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: colours_ {colour_list}
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{
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}
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// generate an array of colours suitable for the waterfall plotter
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QVector<QColor> WFPalette::interpolate () const
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{
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Colours colours {make_valid (colours_)};
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QVector<QColor> result;
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result.reserve (points);
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// do a linear-ish gradient between each supplied colour point
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auto interval = qreal (points) / (colours.size () - 1);
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for (int i {0}; i < points; ++i)
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{
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int prior = i / interval;
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if (prior >= (colours.size () - 1))
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{
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--prior;
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}
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auto next = prior + 1;
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if (next >= colours.size ())
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{
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--next;
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}
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// qDebug () << "WFPalette::interpolate: prior:" << prior << "total:" << colours.size ();
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auto increment = i - qreal (interval) * prior;
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qreal r {colours[prior].redF () + (increment * (colours[next].redF () - colours[prior].redF ()))/interval};
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qreal g {colours[prior].greenF () + (increment * (colours[next].greenF () - colours[prior].greenF ()))/interval};
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qreal b {colours[prior].blueF () + (increment * (colours[next].blueF () - colours[prior].blueF ()))/interval};
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result.append (QColor::fromRgbF (r, g, b));
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// qDebug () << "Palette colour[" << (result.size () - 1) << "] =" << result[result.size () - 1] << "from: r:" << r << "g:" << g << "b:" << b;
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}
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return result;
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}
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// invoke the palette designer
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bool WFPalette::design ()
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{
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Designer designer {colours_};
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if (QDialog::Accepted == designer.exec ())
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{
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colours_ = designer.colours ();
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return true;
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}
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return false;
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}
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