CommandBar/CommandBarWidget.cpp at master · pezcode/CommandBar · GitHub

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/*
Copyright (C) 2011 RVRS Industriis <http://rvrs.in>

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.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#include"CommandBarWidget.h"

#include"ui_commandbar.h"
#include"Command.h"
#include<QComboBox>
#include<QLineEdit>
#include<QLabel>
#include<QRegExp>
#include<QEvent>
#include<QPalette>

const QString CommandBarWidget::tip_text("Enter a command...");

CommandBarWidget::CommandBarWidget(QWidget* parent, Qt::WindowFlags f) : QWidget(parent, f), ui(new Ui::CommandBar), has_tip_(true) {
	ui->setupUi(this);

connect(ui->comboCommand->lineEdit(), SIGNAL(textChanged(const QString&)), this, SLOT(textChanged(const QString&)));
connect(ui->comboCommand->lineEdit(), SIGNAL(returnPressed()), this, SLOT(returnPressed()));

	ui->comboCommand->installEventFilter(this);

	pal_new_ = pal_old_ = ui->comboCommand->lineEdit()->palette();
	pal_new_.setColor(QPalette::Text, Qt::lightGray);

	ui->comboCommand->lineEdit()->setPalette(pal_new_);
	ui->comboCommand->lineEdit()->setText(tip_text);
}

boolCommandBarWidget::eventFilter(QObject* object, QEvent* event)
{
if(object == ui->comboCommand)
	{
switch(event->type())
 {
case QEvent::FocusIn:
if(has_tip_)
 {
 ui->comboCommand->lineEdit()->clear();
 ui->comboCommand->lineEdit()->setPalette(pal_old_);
 }
 has_tip_ = false;
break;
case QEvent::FocusOut:
if(ui->comboCommand->lineEdit()->text().isEmpty())
 {
 ui->comboCommand->lineEdit()->setPalette(pal_new_);
 ui->comboCommand->lineEdit()->setText(tip_text);
 has_tip_ = true;
 }
break;
 }
	}
returnfalse;
}

voidCommandBarWidget::textChanged(const QString& text) {
	ui->labelInfo->clear();
if(!text.isEmpty())
	{
 QString cmd_str;
 QStringList arg_list;
if(split_input(text, cmd_str, arg_list))
 {
 Command cmd(cmd_str, arg_list);
if(cmd.isValid())
 {
// Show description of command and possible arguments
 QString info = "<b>" + cmd.description() + "</b> -- " + cmd.name();

 QStringList arghelp = cmd.arghelp();
if(!arghelp.empty())
 {
 QString argstr;
int i = 0;
int arg_pos = arg_list.size();
if(text[text.length()-1].isSpace())
 arg_pos++;
Q_FOREACH(const QString& arg, arghelp)
 {
if(i+1 == arg_pos)
 argstr += "<u>" + arg + "</u>";
else
 argstr += arg;
 i++;
if(i != arghelp.size())
 argstr += ", ";
 }

 info += "" + argstr;
 }

 ui->labelInfo->setText(info);
 }
elseif(arg_list.empty() && !text[text.length()-1].isSpace())
 {
// Show list of commands beginning with the entered characters
 QStringList similar = similar_commands(cmd_str);
if(!similar.empty())
 {
 QString info;
int i = 0;
Q_FOREACH(const QString& name, similar)
 {
 Command curcmd (name, QStringList());
Q_ASSERT(curcmd.isValid());
 info += "<b>" + curcmd.name() + "</b> " + curcmd.description();
 i++;
if(i != similar.size())
 info += ", ";
 }
 ui->labelInfo->setText(info);
 }
 }
 }
	}
}

voidCommandBarWidget::returnPressed() {
const QString text = ui->comboCommand->lineEdit()->text();
if(!text.isEmpty())
	{
 QString cmd_str;
 QStringList arg_list;
if(split_input(text, cmd_str, arg_list))
 {
 Command cmd(cmd_str, arg_list);
if(cmd.isValid())
 {
if(cmd.execute())
 {
 ui->labelInfo->clear();
 }
else
 {
 ui->labelInfo->setText("<font color=\"Crimson\">" + cmd.error() + "</font>");
 }
 }
else
 {
 ui->labelInfo->setText("<font color=\"Crimson\">Unknown command: " + cmd_str + "</font>");
 }
 }
	}
}

boolCommandBarWidget::split_input(const QString& input, QString& command, QStringList& arguments)
{
	arguments = input.split(QRegExp("\\s+"), QString::SkipEmptyParts);
if(arguments.empty())
returnfalse;

	command = arguments.first();
	arguments.removeFirst();
returntrue;
}

QStringList CommandBarWidget::similar_commands(const QString& command)
{
	QStringList similar;

	QStringList commands = Command::commands();
Q_FOREACH(const QString& name, commands)
	{
if(name.startsWith(command, Qt::CaseInsensitive))
 {
 similar << name;
 }
	}

return similar;
}