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-rw-r--r--examples/widgets/widgets/tablet/images.qrc8
-rw-r--r--examples/widgets/widgets/tablet/images/cursor-airbrush.pngbin0 -> 823 bytes
-rw-r--r--examples/widgets/widgets/tablet/images/cursor-eraser.pngbin0 -> 1454 bytes
-rw-r--r--examples/widgets/widgets/tablet/images/cursor-felt-marker.pngbin0 -> 513 bytes
-rw-r--r--examples/widgets/widgets/tablet/images/cursor-pencil.pngbin0 -> 1307 bytes
-rw-r--r--examples/widgets/widgets/tablet/mainwindow.cpp11
-rw-r--r--examples/widgets/widgets/tablet/mainwindow.h1
-rw-r--r--examples/widgets/widgets/tablet/tablet.pro11
-rw-r--r--examples/widgets/widgets/tablet/tabletapplication.cpp3
-rw-r--r--examples/widgets/widgets/tablet/tabletcanvas.cpp151
-rw-r--r--examples/widgets/widgets/tablet/tabletcanvas.h15
11 files changed, 130 insertions, 70 deletions
diff --git a/examples/widgets/widgets/tablet/images.qrc b/examples/widgets/widgets/tablet/images.qrc
new file mode 100644
index 0000000000..eb3eabbace
--- /dev/null
+++ b/examples/widgets/widgets/tablet/images.qrc
@@ -0,0 +1,8 @@
+<RCC>
+ <qresource>
+ <file>images/cursor-airbrush.png</file>
+ <file>images/cursor-eraser.png</file>
+ <file>images/cursor-felt-marker.png</file>
+ <file>images/cursor-pencil.png</file>
+ </qresource>
+</RCC>
diff --git a/examples/widgets/widgets/tablet/images/cursor-airbrush.png b/examples/widgets/widgets/tablet/images/cursor-airbrush.png
new file mode 100644
index 0000000000..bea756ed6f
--- /dev/null
+++ b/examples/widgets/widgets/tablet/images/cursor-airbrush.png
Binary files differ
diff --git a/examples/widgets/widgets/tablet/images/cursor-eraser.png b/examples/widgets/widgets/tablet/images/cursor-eraser.png
new file mode 100644
index 0000000000..e5488a89f2
--- /dev/null
+++ b/examples/widgets/widgets/tablet/images/cursor-eraser.png
Binary files differ
diff --git a/examples/widgets/widgets/tablet/images/cursor-felt-marker.png b/examples/widgets/widgets/tablet/images/cursor-felt-marker.png
new file mode 100644
index 0000000000..132f09aa39
--- /dev/null
+++ b/examples/widgets/widgets/tablet/images/cursor-felt-marker.png
Binary files differ
diff --git a/examples/widgets/widgets/tablet/images/cursor-pencil.png b/examples/widgets/widgets/tablet/images/cursor-pencil.png
new file mode 100644
index 0000000000..cc2f447d02
--- /dev/null
+++ b/examples/widgets/widgets/tablet/images/cursor-pencil.png
Binary files differ
diff --git a/examples/widgets/widgets/tablet/mainwindow.cpp b/examples/widgets/widgets/tablet/mainwindow.cpp
index aed84c50df..5e84f5b6a2 100644
--- a/examples/widgets/widgets/tablet/mainwindow.cpp
+++ b/examples/widgets/widgets/tablet/mainwindow.cpp
@@ -52,7 +52,7 @@ MainWindow::MainWindow(TabletCanvas *canvas)
myCanvas->setColor(Qt::red);
myCanvas->setLineWidthType(TabletCanvas::LineWidthPressure);
- myCanvas->setAlphaChannelType(TabletCanvas::NoAlpha);
+ myCanvas->setAlphaChannelType(TabletCanvas::AlphaTangentialPressure);
myCanvas->setColorSaturationType(TabletCanvas::NoSaturation);
setWindowTitle(tr("Tablet Example"));
@@ -75,6 +75,8 @@ void MainWindow::alphaActionTriggered(QAction *action)
{
if (action == alphaChannelPressureAction) {
myCanvas->setAlphaChannelType(TabletCanvas::AlphaPressure);
+ } else if (action == alphaChannelTangentialPressureAction) {
+ myCanvas->setAlphaChannelType(TabletCanvas::AlphaTangentialPressure);
} else if (action == alphaChannelTiltAction) {
myCanvas->setAlphaChannelType(TabletCanvas::AlphaTilt);
} else {
@@ -157,15 +159,19 @@ void MainWindow::createActions()
alphaChannelPressureAction = new QAction(tr("&Pressure"), this);
alphaChannelPressureAction->setCheckable(true);
+ alphaChannelTangentialPressureAction = new QAction(tr("T&angential Pressure"), this);
+ alphaChannelTangentialPressureAction->setCheckable(true);
+ alphaChannelTangentialPressureAction->setChecked(true);
+
alphaChannelTiltAction = new QAction(tr("&Tilt"), this);
alphaChannelTiltAction->setCheckable(true);
noAlphaChannelAction = new QAction(tr("No Alpha Channel"), this);
noAlphaChannelAction->setCheckable(true);
- noAlphaChannelAction->setChecked(true);
alphaChannelGroup = new QActionGroup(this);
alphaChannelGroup->addAction(alphaChannelPressureAction);
+ alphaChannelGroup->addAction(alphaChannelTangentialPressureAction);
alphaChannelGroup->addAction(alphaChannelTiltAction);
alphaChannelGroup->addAction(noAlphaChannelAction);
connect(alphaChannelGroup, SIGNAL(triggered(QAction*)),
@@ -259,6 +265,7 @@ void MainWindow::createMenus()
alphaChannelMenu = tabletMenu->addMenu(tr("&Alpha Channel"));
alphaChannelMenu->addAction(alphaChannelPressureAction);
+ alphaChannelMenu->addAction(alphaChannelTangentialPressureAction);
alphaChannelMenu->addAction(alphaChannelTiltAction);
alphaChannelMenu->addAction(noAlphaChannelAction);
diff --git a/examples/widgets/widgets/tablet/mainwindow.h b/examples/widgets/widgets/tablet/mainwindow.h
index 5e77ea1acf..c6ac2e6026 100644
--- a/examples/widgets/widgets/tablet/mainwindow.h
+++ b/examples/widgets/widgets/tablet/mainwindow.h
@@ -79,6 +79,7 @@ private:
QActionGroup *alphaChannelGroup;
QAction *alphaChannelPressureAction;
+ QAction *alphaChannelTangentialPressureAction;
QAction *alphaChannelTiltAction;
QAction *noAlphaChannelAction;
diff --git a/examples/widgets/widgets/tablet/tablet.pro b/examples/widgets/widgets/tablet/tablet.pro
index de81e7b198..9b8927f483 100644
--- a/examples/widgets/widgets/tablet/tablet.pro
+++ b/examples/widgets/widgets/tablet/tablet.pro
@@ -1,12 +1,13 @@
QT += widgets
HEADERS = mainwindow.h \
- tabletcanvas.h \
- tabletapplication.h
+ tabletcanvas.h \
+ tabletapplication.h
SOURCES = mainwindow.cpp \
- main.cpp \
- tabletcanvas.cpp \
- tabletapplication.cpp
+ main.cpp \
+ tabletcanvas.cpp \
+ tabletapplication.cpp
+RESOURCES += images.qrc
# install
target.path = $$[QT_INSTALL_EXAMPLES]/widgets/widgets/tablet
diff --git a/examples/widgets/widgets/tablet/tabletapplication.cpp b/examples/widgets/widgets/tablet/tabletapplication.cpp
index c3210f822c..3e1356ee9c 100644
--- a/examples/widgets/widgets/tablet/tabletapplication.cpp
+++ b/examples/widgets/widgets/tablet/tabletapplication.cpp
@@ -47,8 +47,7 @@ bool TabletApplication::event(QEvent *event)
{
if (event->type() == QEvent::TabletEnterProximity ||
event->type() == QEvent::TabletLeaveProximity) {
- myCanvas->setTabletDevice(
- static_cast<QTabletEvent *>(event)->device());
+ myCanvas->setTabletDevice(static_cast<QTabletEvent *>(event));
return true;
}
return QApplication::event(event);
diff --git a/examples/widgets/widgets/tablet/tabletcanvas.cpp b/examples/widgets/widgets/tablet/tabletcanvas.cpp
index 20d6291292..8ff3d41e0e 100644
--- a/examples/widgets/widgets/tablet/tabletcanvas.cpp
+++ b/examples/widgets/widgets/tablet/tabletcanvas.cpp
@@ -47,14 +47,13 @@
TabletCanvas::TabletCanvas()
{
resize(500, 500);
- myBrush = QBrush();
- myPen = QPen();
+ myColor = Qt::red;
+ myBrush = QBrush(myColor);
+ myPen = QPen(myBrush, 1.0, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
initPixmap();
setAutoFillBackground(true);
deviceDown = false;
- myColor = Qt::red;
- myTabletDevice = QTabletEvent::Stylus;
- alphaChannelType = NoAlpha;
+ alphaChannelType = AlphaTangentialPressure;
colorSaturationType = NoSaturation;
lineWidthType = LineWidthPressure;
}
@@ -99,24 +98,25 @@ void TabletCanvas::tabletEvent(QTabletEvent *event)
case QEvent::TabletPress:
if (!deviceDown) {
deviceDown = true;
- polyLine[0] = polyLine[1] = polyLine[2] = event->pos();
+ lastPoint.pos = event->posF();
+ lastPoint.rotation = event->rotation();
}
break;
- case QEvent::TabletRelease:
- if (deviceDown)
- deviceDown = false;
- break;
case QEvent::TabletMove:
- polyLine[2] = polyLine[1];
- polyLine[1] = polyLine[0];
- polyLine[0] = event->pos();
-
+ if (event->device() == QTabletEvent::RotationStylus)
+ updateCursor(event);
if (deviceDown) {
updateBrush(event);
QPainter painter(&pixmap);
paintPixmap(painter, event);
+ lastPoint.pos = event->posF();
+ lastPoint.rotation = event->rotation();
}
break;
+ case QEvent::TabletRelease:
+ if (deviceDown && event->buttons() == Qt::NoButton)
+ deviceDown = false;
+ break;
default:
break;
}
@@ -135,23 +135,44 @@ void TabletCanvas::paintEvent(QPaintEvent *)
//! [5]
void TabletCanvas::paintPixmap(QPainter &painter, QTabletEvent *event)
{
- QPoint brushAdjust(10, 10);
+ painter.setRenderHint(QPainter::Antialiasing);
- switch (myTabletDevice) {
+ switch (event->device()) {
+//! [6]
case QTabletEvent::Airbrush:
- myBrush.setColor(myColor);
- myBrush.setStyle(brushPattern(event->pressure()));
- painter.setPen(Qt::NoPen);
- painter.setBrush(myBrush);
-
- for (int i = 0; i < 3; ++i) {
- painter.drawEllipse(QRect(polyLine[i] - brushAdjust,
- polyLine[i] + brushAdjust));
+ {
+ painter.setPen(Qt::NoPen);
+ QRadialGradient grad(lastPoint.pos, myPen.widthF() * 10.0);
+ QColor color = myBrush.color();
+ color.setAlphaF(color.alphaF() * 0.25);
+ grad.setColorAt(0, myBrush.color());
+ grad.setColorAt(0.5, Qt::transparent);
+ painter.setBrush(grad);
+ qreal radius = grad.radius();
+ painter.drawEllipse(event->posF(), radius, radius);
+ }
+ break;
+ case QTabletEvent::RotationStylus:
+ {
+ myBrush.setStyle(Qt::SolidPattern);
+ painter.setPen(Qt::NoPen);
+ painter.setBrush(myBrush);
+ QPolygonF poly;
+ qreal halfWidth = myPen.widthF();
+ QPointF brushAdjust(qSin(qDegreesToRadians(lastPoint.rotation)) * halfWidth,
+ qCos(qDegreesToRadians(lastPoint.rotation)) * halfWidth);
+ poly << lastPoint.pos + brushAdjust;
+ poly << lastPoint.pos - brushAdjust;
+ brushAdjust = QPointF(qSin(qDegreesToRadians(event->rotation())) * halfWidth,
+ qCos(qDegreesToRadians(event->rotation())) * halfWidth);
+ poly << event->posF() - brushAdjust;
+ poly << event->posF() + brushAdjust;
+ painter.drawConvexPolygon(poly);
}
break;
+//! [6]
case QTabletEvent::Puck:
case QTabletEvent::FourDMouse:
- case QTabletEvent::RotationStylus:
{
const QString error(tr("This input device is not supported by the example."));
#ifndef QT_NO_STATUSTIP
@@ -174,42 +195,15 @@ void TabletCanvas::paintPixmap(QPainter &painter, QTabletEvent *event)
}
// FALL-THROUGH
case QTabletEvent::Stylus:
- painter.setBrush(myBrush);
painter.setPen(myPen);
- painter.drawLine(polyLine[1], event->pos());
+ painter.drawLine(lastPoint.pos, event->posF());
break;
}
}
//! [5]
-//! [6]
-Qt::BrushStyle TabletCanvas::brushPattern(qreal value)
-{
- int pattern = int((value) * 100.0) % 7;
-
- switch (pattern) {
- case 0:
- return Qt::SolidPattern;
- case 1:
- return Qt::Dense1Pattern;
- case 2:
- return Qt::Dense2Pattern;
- case 3:
- return Qt::Dense3Pattern;
- case 4:
- return Qt::Dense4Pattern;
- case 5:
- return Qt::Dense5Pattern;
- case 6:
- return Qt::Dense6Pattern;
- default:
- return Qt::Dense7Pattern;
- }
-}
-//! [6]
-
//! [7]
-void TabletCanvas::updateBrush(QTabletEvent *event)
+void TabletCanvas::updateBrush(const QTabletEvent *event)
{
int hue, saturation, value, alpha;
myColor.getHsv(&hue, &saturation, &value, &alpha);
@@ -220,7 +214,13 @@ void TabletCanvas::updateBrush(QTabletEvent *event)
switch (alphaChannelType) {
case AlphaPressure:
- myColor.setAlpha(int(event->pressure() * 255.0));
+ myColor.setAlphaF(event->pressure());
+ break;
+ case AlphaTangentialPressure:
+ if (event->device() == QTabletEvent::Airbrush)
+ myColor.setAlphaF(qMax(0.01, (event->tangentialPressure() + 1.0) / 2.0));
+ else
+ myColor.setAlpha(255);
break;
case AlphaTilt:
myColor.setAlpha(maximum(abs(vValue - 127), abs(hValue - 127)));
@@ -268,8 +268,47 @@ void TabletCanvas::updateBrush(QTabletEvent *event)
}
//! [11]
+void TabletCanvas::updateCursor(const QTabletEvent *event)
+{
+ QCursor cursor;
+ if (event->type() != QEvent::TabletLeaveProximity) {
+ if (event->pointerType() == QTabletEvent::Eraser) {
+ cursor = QCursor(QPixmap(":/images/cursor-eraser.png"), 3, 28);
+ } else {
+ switch (event->device()) {
+ case QTabletEvent::Stylus:
+ cursor = QCursor(QPixmap(":/images/cursor-pencil.png"), 0, 0);
+ break;
+ case QTabletEvent::Airbrush:
+ cursor = QCursor(QPixmap(":/images/cursor-airbrush.png"), 3, 4);
+ break;
+ case QTabletEvent::RotationStylus: {
+ QImage origImg(QLatin1String(":/images/cursor-felt-marker.png"));
+ QImage img(32, 32, QImage::Format_ARGB32);
+ QColor solid = myColor;
+ solid.setAlpha(255);
+ img.fill(solid);
+ QPainter painter(&img);
+ QTransform transform = painter.transform();
+ transform.translate(16, 16);
+ transform.rotate(-event->rotation());
+ painter.setTransform(transform);
+ painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
+ painter.drawImage(-24, -24, origImg);
+ painter.setCompositionMode(QPainter::CompositionMode_HardLight);
+ painter.drawImage(-24, -24, origImg);
+ painter.end();
+ cursor = QCursor(QPixmap::fromImage(img), 16, 16);
+ } break;
+ default:
+ break;
+ }
+ }
+ }
+ setCursor(cursor);
+}
+
void TabletCanvas::resizeEvent(QResizeEvent *)
{
initPixmap();
- polyLine[0] = polyLine[1] = polyLine[2] = QPoint();
}
diff --git a/examples/widgets/widgets/tablet/tabletcanvas.h b/examples/widgets/widgets/tablet/tabletcanvas.h
index 873f3a7ab0..a7335dbaf0 100644
--- a/examples/widgets/widgets/tablet/tabletcanvas.h
+++ b/examples/widgets/widgets/tablet/tabletcanvas.h
@@ -61,7 +61,7 @@ class TabletCanvas : public QWidget
Q_OBJECT
public:
- enum AlphaChannelType { AlphaPressure, AlphaTilt, NoAlpha };
+ enum AlphaChannelType { AlphaPressure, AlphaTangentialPressure, AlphaTilt, NoAlpha };
enum ColorSaturationType { SaturationVTilt, SaturationHTilt,
SaturationPressure, NoSaturation };
enum LineWidthType { LineWidthPressure, LineWidthTilt, NoLineWidth };
@@ -80,8 +80,8 @@ public:
{ myColor = color; }
QColor color() const
{ return myColor; }
- void setTabletDevice(QTabletEvent::TabletDevice device)
- { myTabletDevice = device; }
+ void setTabletDevice(QTabletEvent *event)
+ { myTabletDevice = event->device(); updateCursor(event); }
int maximum(int a, int b)
{ return a > b ? a : b; }
@@ -94,7 +94,8 @@ private:
void initPixmap();
void paintPixmap(QPainter &painter, QTabletEvent *event);
Qt::BrushStyle brushPattern(qreal value);
- void updateBrush(QTabletEvent *event);
+ void updateBrush(const QTabletEvent *event);
+ void updateCursor(const QTabletEvent *event);
AlphaChannelType alphaChannelType;
ColorSaturationType colorSaturationType;
@@ -107,7 +108,11 @@ private:
QBrush myBrush;
QPen myPen;
bool deviceDown;
- QPoint polyLine[3];
+
+ struct Point {
+ QPointF pos;
+ qreal rotation;
+ } lastPoint;
};
//! [0]
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-06 16:20:26 +0000