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Chenwenxuan
345
ui/qg_commandedit.cpp
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345
ui/qg_commandedit.cpp
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/****************************************************************************
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**
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** This file is part of the LibreCAD project, a 2D CAD program
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**
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** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
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** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
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** Copyright (C) 2016 ravas (github.com/r-a-v-a-s)
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**
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** This file may be distributed and/or modified under the terms of the
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** GNU General Public License version 2 as published by the Free Software
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** Foundation and appearing in the file gpl-2.0.txt included in the
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** packaging of this file.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**
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** This copyright notice MUST APPEAR in all copies of the script!
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**
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**********************************************************************/
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#include "qg_commandedit.h"
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#include <QKeyEvent>
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#include <QRegularExpression>
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#include <QFile>
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#include <QTextStream>
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#include <QApplication>
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#include <QClipboard>
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#include <rs_math.h>
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#include <rs_settings.h>
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/**
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* Default Constructor. You must call init manually if you choose
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* to use this constructor.
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*/
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QG_CommandEdit::QG_CommandEdit(QWidget* parent)
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: QLineEdit(parent)
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, keycode_mode(false)
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, relative_ray("none")
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, calculator_mode(false)
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{
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setStyleSheet("selection-color: white; selection-background-color: green;");
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setFrame(false);
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setFocusPolicy(Qt::StrongFocus);
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}
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/**
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* Bypass for key press events from the tab key.
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*/
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bool QG_CommandEdit::event(QEvent* e) {
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if (e->type()==QEvent::KeyPress) {
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QKeyEvent* k = (QKeyEvent*)e;
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if (k->key()==Qt::Key_Tab) {
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emit tabPressed();
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return true;
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}
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}
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return QLineEdit::event(e);
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}
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/**
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* History (arrow key up/down) support, tab.
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*/
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void QG_CommandEdit::keyPressEvent(QKeyEvent* e)
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{
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if (e->modifiers() & Qt::ControlModifier)
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{
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auto value = text();
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if (value.isEmpty())
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value = relative_ray;
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QString r_string;
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switch (e->key())
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{
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case Qt::Key_Up:
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r_string = "0," + value;
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break;
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case Qt::Key_Down:
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r_string = "0,-" + value;
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break;
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case Qt::Key_Right:
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r_string = value + ",0";
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break;
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case Qt::Key_Left:
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r_string = "-" + value + ",0";
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break;
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default:
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QLineEdit::keyPressEvent(e);
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return;
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}
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// r_string is empty when Ctrl is pressed
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if (!r_string.isEmpty())
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{
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if (value == "none")
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{
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emit message(
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QObject::tr("You must input a distance first.")
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);
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}
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else
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{
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relative_ray = value;
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emit command("@"+r_string);
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}
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}
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return;
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}
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switch (e->key())
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{
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case Qt::Key_Up:
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if (!historyList.isEmpty() && it>historyList.begin())
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{
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it--;
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setText(*it);
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}
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break;
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case Qt::Key_Down:
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if (!historyList.isEmpty() && it<historyList.end() )
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{
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it++;
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if (it<historyList.end()) {
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setText(*it);
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}
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else {
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setText("");
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}
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}
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break;
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case Qt::Key_Enter:
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case Qt::Key_Return:
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processInput(text());
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break;
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case Qt::Key_Space:
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if (RS_SETTINGS->readNumEntry("/Keyboard/EvaluateCommandOnSpace", true) ||
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(text().isEmpty() && RS_SETTINGS->readNumEntry("/Keyboard/ToggleFreeSnapOnSpace", true)))
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processInput(text());
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else if (!text().isEmpty())
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QLineEdit::keyPressEvent(e);
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break;
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case Qt::Key_Escape:
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if (text().isEmpty()) {
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emit escape();
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}
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else {
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setText("");
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}
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break;
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default:
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QLineEdit::keyPressEvent(e);
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break;
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}
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if (keycode_mode)
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{
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auto input = text();
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if (input.size() == 2)
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{
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emit keycode(input);
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}
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}
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}
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void QG_CommandEdit::evaluateExpression(QString input)
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{
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QRegularExpression regex(R"~(([\d\.]+)deg|d)~");
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input.replace(regex, R"~(\1*pi/180)~");
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bool ok = true;
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double result = RS_Math::eval(input, &ok);
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if (ok)
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emit message(input + " = " + QString::number(result, 'g', 12));
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else
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emit message(QObject::tr("Calculator error for input: ") + input);
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}
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void QG_CommandEdit::focusInEvent(QFocusEvent *e) {
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emit focusIn();
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QLineEdit::focusInEvent(e);
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}
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void QG_CommandEdit::focusOutEvent(QFocusEvent *e) {
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emit focusOut();
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QLineEdit::focusOutEvent(e);
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}
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void QG_CommandEdit::processInput(QString input)
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{
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// author: ravas
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// convert 10..0 to @10,0
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QRegularExpression regex(R"~(([-\w\.\\]+)\.\.)~");
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input.replace(regex, "@\\1,");
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if (isForeignCommand(input))
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{
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if (input.contains(";"))
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{
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foreach (auto str, input.split(";"))
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{
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if (str.contains("\\"))
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processVariable(str);
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else
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emit command(str);
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}
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}
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else
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{
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if (input.contains("\\"))
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processVariable(input);
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else
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emit command(input);
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}
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historyList.append(input);
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it = historyList.end();
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}
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clear();
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}
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bool QG_CommandEdit::isForeignCommand(QString input)
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{
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// author: ravas
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bool r_value = true;
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if (input == tr("clear"))
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{
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emit clearCommandsHistory();
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r_value = false;
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}
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else if (input == QObject::tr("cal"))
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{
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calculator_mode = !calculator_mode;
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if(calculator_mode)
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emit message(QObject::tr("Calculator mode: On"));
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else
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emit message(QObject::tr("Calculator mode: Off"));
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r_value = false;
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}
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else if (calculator_mode)
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{
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evaluateExpression(input);
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r_value = false;
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}
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else if (input.contains("="))
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{
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auto var_value = input.split("=");
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variables[var_value[0]] = var_value[1];
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r_value = false;
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}
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return r_value;
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}
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void QG_CommandEdit::processVariable(QString input)
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{
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// author: ravas
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if (input.contains(","))
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{
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QString rel = "";
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if (input.contains("@"))
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{
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rel = "@";
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input.remove("@");
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}
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auto x_y = input.split(",");
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if (x_y[0].contains("\\"))
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{
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x_y[0].remove("\\");
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if (variables.contains(x_y[0]))
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x_y[0] = variables[x_y[0]];
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}
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if (x_y[1].contains("\\"))
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{
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x_y[1].remove("\\");
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if (variables.contains(x_y[1]))
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x_y[1] = variables[x_y[1]];
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}
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emit command(rel + x_y[0] + "," + x_y[1]);
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return;
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}
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input.remove("\\");
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if (variables.contains(input))
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{
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input = variables[input];
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if (input.contains(";"))
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{
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foreach (auto str, input.split(";"))
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{
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if (str.contains("\\"))
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processVariable(str);
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else
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emit command(str);
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}
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}
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else emit command(input);
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}
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}
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void QG_CommandEdit::readCommandFile(const QString& path)
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{
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// author: ravas
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QFile file(path);
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if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
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return;
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QTextStream txt_stream(&file);
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QString line;
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while (!txt_stream.atEnd())
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{
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line = txt_stream.readLine();
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line.remove(" ");
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if (!line.startsWith("#"))
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processInput(line);
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}
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}
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void QG_CommandEdit::modifiedPaste()
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{
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auto txt = qApp->clipboard()->text();
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txt.replace("\n", ";");
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setText(txt);
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}
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