Add TabletTester code files from Drawpile

The source files are not yet modified.

libs/ui/input/wintab/drawpile_tablettester/README.md

+Notes on code originating from external source:
+
+Tablet Tester
+=============
+
+Files are taken and possibly modified from the git repo of [Drawpile] on
+commit bc06dceba83e8c758d25cfe81b986e18f38aae95.
+
+[Drawpile]: https://github.com/drawpile/Drawpile
+
+File                 | Original in repo of Drawpile
+-------------------- | ---
+tablettester.cpp     | src/desktop/dialogs/tablettester.cpp
+tablettester.h       | src/desktop/dialogs/tablettester.h
+tablettest.cpp       | src/desktop/widgets/tablettest.cpp
+tablettest.h         | src/desktop/widgets/tablettest.h
+tablettest.ui        | src/desktop/ui/tablettest.ui

libs/ui/input/wintab/drawpile_tablettester/tablettest.cpp

+/*
+   Drawpile - a collaborative drawing program.
+
+   Copyright (C) 2017 Calle Laakkonen
+
+   Drawpile 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 3 of the License, or
+   (at your option) any later version.
+
+   Drawpile 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 Drawpile.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "tablettest.h"
+
+#include <QPaintEvent>
+#include <QPainter>
+
+#ifndef DESIGNER_PLUGIN
+namespace widgets {
+#endif
+
+TabletTester::TabletTester(QWidget *parent)
+	: QWidget(parent), m_mouseDown(false), m_tabletDown(false)
+{
+}
+
+void TabletTester::clear()
+{
+	m_mousePath.clear();
+	m_tabletPath.clear();
+	update();
+}
+
+void TabletTester::paintEvent(QPaintEvent *e)
+{
+	Q_UNUSED(e);
+	const int w = width();
+	const int h = height();
+	QPainter p(this);
+	p.fillRect(0, 0, w, h, QColor(200, 200, 200));
+	p.setPen(QColor(128, 128, 128));
+
+	// Draw grid
+	for(int i=w/8;i<w;i+=w/8)
+		p.drawLine(i, 0, i, h);
+	for(int i=h/8;i<h;i+=h/8)
+		p.drawLine(0, i, w, i);
+
+	// Draw paths
+	if(!m_mousePath.isEmpty()) {
+		p.setPen(QPen(Qt::red, 3));
+		p.drawPolyline(m_mousePath);
+	}
+	if(!m_tabletPath.isEmpty()) {
+		p.setPen(QPen(Qt::blue, 2));
+		p.drawPolyline(m_tabletPath);
+	}
+}
+
+void TabletTester::mousePressEvent(QMouseEvent *e)
+{
+	emit eventReport(QString("Mouse press X=%1 Y=%2 B=%3").arg(e->x()).arg(e->y()).arg(e->button()));
+	m_mouseDown = true;
+	m_mousePath.clear();
+	update();
+}
+
+void TabletTester::mouseMoveEvent(QMouseEvent *e)
+{
+	emit eventReport(QString("Mouse move X=%1 Y=%2 B=%3").arg(e->x()).arg(e->y()).arg(e->buttons()));
+	m_mousePath << e->pos();
+	update();
+}
+
+void TabletTester::mouseReleaseEvent(QMouseEvent *e)
+{
+	Q_UNUSED(e);
+	emit eventReport(QString("Mouse release"));
+	m_mouseDown = false;
+}
+
+void TabletTester::tabletEvent(QTabletEvent *e)
+{
+	e->accept();
+
+	QString msg;
+	switch(e->device()) {
+		case QTabletEvent::Stylus: msg = "Stylus"; break;
+		default: msg = QString("Device(%1)").arg(e->device()); break;
+	}
+
+	switch(e->type()) {
+		case QEvent::TabletMove:
+			msg += " move";
+			break;
+		case QEvent::TabletPress:
+			msg += " press";
+			m_tabletPath.clear();
+			m_tabletDown = true;
+			break;
+		case QEvent::TabletRelease:
+			msg += " release";
+			m_tabletDown = false;
+			break;
+		default:
+			msg += QString(" event-%1").arg(e->type());
+			break;
+	}
+
+	msg += QString(" X=%1 Y=%2 B=%3 P=%4%")
+		.arg(e->posF().x(), 0, 'f', 2)
+		.arg(e->posF().y(), 0, 'f', 2)
+		.arg(e->buttons())
+		.arg(e->pressure()*100, 0, 'f', 1)
+		;
+
+	if(e->type() == QEvent::TabletMove) {
+		if(m_tabletDown) {
+			msg += " (DRAW)";
+			m_tabletPath << e->pos();
+			update();
+		} else {
+			msg += " (HOVER)";
+		}
+	}
+
+	emit eventReport(msg);
+}
+
+#ifndef DESIGNER_PLUGIN
+}
+#endif

libs/ui/input/wintab/drawpile_tablettester/tablettest.h

+/*
+   Drawpile - a collaborative drawing program.
+
+   Copyright (C) 2017 Calle Laakkonen
+
+   Drawpile 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 3 of the License, or
+   (at your option) any later version.
+
+   Drawpile 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 Drawpile.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef TABLETTEST_WIDGET_H
+#define TABLETTEST_WIDGET_H
+
+#include <QWidget>
+
+#ifndef DESIGNER_PLUGIN
+namespace widgets {
+#define PLUGIN_EXPORT
+#else
+#include <QtUiPlugin/QDesignerExportWidget>
+#define PLUGIN_EXPORT QDESIGNER_WIDGET_EXPORT
+#endif
+
+class PLUGIN_EXPORT TabletTester : public QWidget {
+	Q_OBJECT
+public:
+	TabletTester(QWidget *parent=nullptr);
+
+public slots:
+	void clear();
+
+signals:
+	void eventReport(const QString &msg);
+
+protected:
+	void paintEvent(QPaintEvent *e) override;
+	void mousePressEvent(QMouseEvent *e) override;
+	void mouseMoveEvent(QMouseEvent *e) override;
+	void mouseReleaseEvent(QMouseEvent *e) override;
+	void tabletEvent(QTabletEvent *e) override;
+
+private:
+	QPolygon m_mousePath;
+	QPolygon m_tabletPath;
+
+	bool m_mouseDown;
+	bool m_tabletDown;
+};
+
+#ifndef DESIGNER_PLUGIN
+}
+#endif
+
+
+#endif
+

libs/ui/input/wintab/drawpile_tablettester/tablettest.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>TabletTest</class>
+ <widget class="QDialog" name="TabletTest">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>730</width>
+    <height>385</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Tablet Tester</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,1">
+   <item>
+    <widget class="TabletTester" name="tablettest"/>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="QPlainTextEdit" name="logView">
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton">
+       <property name="text">
+        <string>Clear</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>TabletTester</class>
+   <extends>QWidget</extends>
+   <header>widgets/tablettest.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>pushButton</sender>
+   <signal>clicked()</signal>
+   <receiver>logView</receiver>
+   <slot>clear()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>722</x>
+     <y>377</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>659</x>
+     <y>84</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>pushButton</sender>
+   <signal>clicked()</signal>
+   <receiver>tablettest</receiver>
+   <slot>clear()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>419</x>
+     <y>359</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>142</x>
+     <y>242</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>tablettest</sender>
+   <signal>eventReport(QString)</signal>
+   <receiver>logView</receiver>
+   <slot>appendPlainText(QString)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>287</x>
+     <y>187</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>546</x>
+     <y>207</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

libs/ui/input/wintab/drawpile_tablettester/tablettester.cpp

+/*
+   Drawpile - a collaborative drawing program.
+
+   Copyright (C) 2017 Calle Laakkonen
+
+   Drawpile 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 3 of the License, or
+   (at your option) any later version.
+
+   Drawpile 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 Drawpile.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "tablettester.h"
+#include "widgets/tablettest.h"
+using widgets::TabletTester; // work around missing namespace in UIC generated code
+#include "ui_tablettest.h"
+
+#include "../main.h"
+
+namespace dialogs {
+
+TabletTestDialog::TabletTestDialog( QWidget *parent) :
+	QDialog(parent)
+{
+	m_ui = new Ui_TabletTest;
+	m_ui->setupUi(this);
+
+	connect(static_cast<DrawpileApp*>(qApp), &DrawpileApp::eraserNear, this, [this](bool near) {
+		QString msg;
+		if(near)
+			msg = QStringLiteral("Eraser brought near");
+		else
+			msg = QStringLiteral("Eraser taken away");
+
+		m_ui->logView->appendPlainText(msg);
+	});
+}
+
+TabletTestDialog::~TabletTestDialog()
+{
+	delete m_ui;
+}
+
+}
+

libs/ui/input/wintab/drawpile_tablettester/tablettester.h

+/*
+   Drawpile - a collaborative drawing program.
+
+   Copyright (C) 2017 Calle Laakkonen
+
+   Drawpile 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 3 of the License, or
+   (at your option) any later version.
+
+   Drawpile 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 Drawpile.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef TABLETTESTDIALOG_H
+#define TABLETTESTDIALOG_H
+
+#include <QDialog>
+
+class Ui_TabletTest;
+
+namespace dialogs {
+
+class TabletTestDialog : public QDialog
+{
+	Q_OBJECT
+public:
+	TabletTestDialog(QWidget *parent=nullptr);
+	~TabletTestDialog();
+
+private:
+	Ui_TabletTest *m_ui;
+
+};
+
+}
+
+#endif
+