How i could create a click effect similar to push buttons on a QLabel?
QPixmap pixmap;
pixmap.load(":/files/hotkeys.png");
int w = 131;
int h = 71;
pixmap = pixmap.scaled(w, h, Qt::KeepAspectRatio);
// Label
ui.label->setGeometry(220, 220, w, h);
ui.label->setPixmap(pixmap);
// Button
QIcon icon(pixmap);
ui.toolButton->setIconSize(QSize(w, h));
ui.toolButton->setIcon(icon);
ui.toolButton->setStyleSheet("QToolButton { background-color: transparent }");
By click effect i mean like when you click on a push button containing a picture:
Ideally you'd just use a QToolButton or QPushButton, but if you must use a QLabel, you could do it by subclassing QLabel with a custom paintEvent() to give the desired effect, something like this:
class MyLabel : public QLabel
{
public:
MyLabel(const QPixmap & pm) : _isMouseDown(false) {setPixmap(pm);}
virtual void mousePressEvent( QMouseEvent * e) {_isMouseDown = true; update(); e->accept();}
virtual void mouseReleaseEvent(QMouseEvent * e) {_isMouseDown = false; update(); e->accept();}
virtual void paintEvent(QPaintEvent * e)
{
QPainter p(this);
const int offset = _isMouseDown ? 2 : 0;
p.drawPixmap(QPoint(offset, offset), *pixmap());
}
private:
bool _isMouseDown;
};
Related
I am new at Qt and I want to write my custom QGraphicsItem which contains a rectangle and couple of buttons. I want to write a single custom component that could be easily added to QGraphicsScene and moved or resized with contents(buttons and rectangles) in it. In the end I want to add multiple customized QGraphicsItem to my QGraphicsScene. My question is how can I write this customized QGraphicsItem that contains buttons and rectangles which relative positions to each other are constant.
In this drawing green colored rectangles represent buttons and their relative position to each other always stays same (as if they are placed using qlayouts)
Thanks to #replete, from the example at http://doc.qt.io/qt-5/qtwidgets-graphicsview-dragdroprobot-example.html I was able to create a custom QGraphicsItem with clickable sub-parts in it. In code below BboxItem represents container QGraphicsItem and BboxItemContent represents childs of it. By emitting signals whith mause click events I was able to implement button like features. And I can move the BboxItem by setting its bounding rectangle.
BboxItem related source code:
BboxItemContent::BboxItemContent(QGraphicsItem *parent, int type, QColor color,QRectF *rect)
: QGraphicsObject(parent)
{
content_rectangle = rect;
content_type = type;
switch (type)
{
case 0:
rectangle_color = color;
icon = 0;
break;
case 1:
icon = new QImage(":/resource/assets/info_btn.png");
break;
case 2:
icon = new QImage(":/resource/assets/close_btn.png");
break;
}
}
BboxItemContent::~BboxItemContent()
{
delete icon;
}
QRectF BboxItemContent::boundingRect() const
{
return QRectF(content_rectangle->x(), content_rectangle->y(), content_rectangle->width(), content_rectangle->height());
}
void BboxItemContent::paint(QPainter *painter,
const QStyleOptionGraphicsItem *option, QWidget *widget)
{
if (icon == 0)
{
QPen pen(rectangle_color, 3);
painter->setPen(pen);
painter->drawRect(*content_rectangle);
}
else
{
painter->drawImage(*content_rectangle, *icon);
}
}
void BboxItemContent::mousePressEvent(QGraphicsSceneMouseEvent * event)
{
emit bboxContentClickedSignal();
}
void BboxItemContent::setRect(QRectF *rect)
{
content_rectangle = rect;
update();
}
BboxItem::BboxItem(QGraphicsItem *parent,QRectF *itemRect) : BboxItemContent(parent,0,Qt::red, itemRect)
{
setFlag(ItemHasNoContents);
bbox_area = new BboxItemContent(this, 0, Qt::red, itemRect);
info_btn = new BboxItemContent(this, 1, Qt::red, new QRectF(itemRect->x() - 30, itemRect->y(), 30, 30));
connect(info_btn, &BboxItemContent::bboxContentClickedSignal, this, &BboxItem::onInfoClickedSlot);
delete_btn= new BboxItemContent(this, 2, Qt::red, new QRectF((itemRect->x()+itemRect->width()), itemRect->y(), 30, 30));
connect(delete_btn, &BboxItemContent::bboxContentClickedSignal, this, &BboxItem::onDeleteClickedSlot);
}
void BboxItem::onDeleteClickedSlot()
{
//delete clicked actions
}
void BboxItem::onInfoClickedSlot()
{
//info clicked actions
}
void BboxItem::setRect(QRectF *rect)
{
bbox_area->setRect(rect);
info_btn->setRect(new QRectF(rect->x() - 30, rect->y(), 30, 30));
delete_btn->setRect(new QRectF((rect->x() + rect->width()), rect->y(), 30, 30));
}
Related Headers:
class BboxItemContent : public QGraphicsObject
{
Q_OBJECT
public:
BboxItemContent(QGraphicsItem *parent = 0, int type = 0, QColor color = Qt::red, QRectF *rect=nullptr);
~BboxItemContent();
// Inherited from QGraphicsItem
QRectF boundingRect() const override;
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) override;
void setRect(QRectF *rect);
signals:
void bboxContentClickedSignal();
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *event);
private:
QImage *icon;
QColor rectangle_color;
QRectF *content_rectangle;
int content_type;
};
class BboxItem : public BboxItemContent {
Q_OBJECT
public:
BboxItem(QGraphicsItem *parent = 0,QRectF *itemRect=nullptr);
void setRect(QRectF *rect);
private slots:
void onDeleteClickedSlot();
void onInfoClickedSlot();
private:
BboxItemContent *delete_btn;
BboxItemContent *bbox_area;
BboxItemContent *info_btn;
};
I have this image :
I want the border of my GraphicsViewbecome exactly like this image.
(consider the bellow image I want the top white rectangle become that shape)
I inherit a class from QGraphicsView and tried drawing this image in both drawBackground and paintEvent but none of them works.
My code :
.h file
class GraphicsTraxSuggestionView : public QGraphicsView {
Q_OBJECT
public:
GraphicsTraxSuggestionView(QWidget* widget);
protected:
// void paintEvent(QPaintEvent *event);
void drawBackground(QPainter *p, const QRectF &rect);
private:
};
.cpp file
GraphicsTraxSuggestionView::GraphicsTraxSuggestionView(QWidget* widget)
: QGraphicsView(widget)
{
//setFrameShadow(QFrame::Raised);
setFrameStyle(QFrame::NoFrame);
setStyleSheet("QGraphicsView { border-style: none; }");
}
void GraphicsTraxSuggestionView::drawBackground(QPainter *painter, const QRectF &rect)
{
painter->drawImage(rect, QImage("suggestionBorder.png"));
}
result of my code : http://i.stack.imgur.com/r0waP.png
Any suggestion ?
1) Create a QGraphicsScene having the size of you image
2) Set it as the view's scene
3) Draw in the drawBackground as you're doing now
I tried setMask() and now it works fine .
GraphicsTraxSuggestionView::GraphicsTraxSuggestionView(QWidget* widget,QGraphicsScene* scene)
: QGraphicsView(widget),
scene_(scene)
{
setStyleSheet("background-color: transparent;");
QPixmap myPixmap = QPixmap(":/Game/Tiles//suggestionBorder.png").scaled
(scene_->sceneRect().size().width(),scene_->sceneRect().size().height());
setMask(myPixmap.mask());
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
}
void GraphicsTraxSuggestionView::drawBackground(QPainter *painter, const QRectF &rect)
{
painter->drawImage(scene_->sceneRect(), QImage(":/Game/Tiles//suggestionBorder.png"));
}
result :
I'm wondering how I can create bitmap from my data and show it on my widget.
I have QVector vector, which is vector of some points to draw chart. How I can repaint it on my widget but with using QBitmap? I don't want draw simply on widget, I prefer pass the pixmap to widget, just to show it.
How can I do this?
My code:
QPainter painter(pixMap);
painter.setPen(QPen(Qt::black, 2));
painter.drawPolyline(this->data.data(), this->data.size());
painter.drawLine(QPointF(5,5),QPointF(50,50));
setPixmap(*pixMap);
Here is my sample code. Why it's not working? I can't see anything on widget.
I have widget class
class Widget : public QLabel
{
public:
Widget(QVector<QPointF> * data);
~Widget();
protected:
void paintEvent(QPaintEvent * event);
private:
QVector<QPointF> data;
QPixmap *pixMap;
};
In constructor I have
Widget::Widget(QVector<QPointF> * data){
pixMap = new QPixmap(300,300);
pixMap->fill(Qt::red);
}
And in paintEvent
void Waveform::paintEvent(QPaintEvent *event)
{
QPainter painter(pixMap);
painter.setPen(QPen(Qt::white, 2));
painter.drawPolyline(this->data.data(), this->data.size());
painter.drawLine(QPointF(5,5),QPointF(50,50));
setPixmap(*pixMap);
}
If I replace QPainter painter(pixMap) with QPainter painter(this), I can see my chart. But I want to use pixmap.
I think so, but I wasn't sure without full code, now I am absolutely sure. You should do standard processing of paintEvent. So try this:
void Waveform::paintEvent(QPaintEvent *e)
{
static const QPointF points[3] = {
QPointF(10.0, 80.0),
QPointF(20.0, 10.0),
QPointF(80.0, 30.0),
};
QPainter painter(pixMap);
painter.setPen(QPen(Qt::black, 2));
painter.drawPolyline(points, 3);
painter.drawLine(QPointF(5,5),QPointF(50,50));
setPixmap(*pixMap);
QLabel::paintEvent(e);//standard processing
}
But I think that you don't need paintEvent at all, then you can totally remove paintEvent from your class or do
void VertLabel::paintEvent(QPaintEvent *e)
{
QLabel::paintEvent(e);//in this case you don't need paintEvent at all, remove it from cpp and header files
}
and in constructor:
pixMap = new QPixmap(300,300);
pixMap->fill(Qt::red);
this->resize(300,300);
static const QPointF points[3] = {
QPointF(10.0, 80.0),
QPointF(20.0, 10.0),
QPointF(80.0, 30.0),
};
QPainter painter(pixMap);
painter.setPen(QPen(Qt::black, 2));
painter.drawPolyline(points, 3);
painter.drawLine(QPointF(5,5),QPointF(50,50));
setPixmap(*pixMap);
How do I add color on the sides of a tableView?
You should subclass QHeaderView and implement your own class like:
#include<QtWidgets>
class HeaderView: public QHeaderView
{
public:
HeaderView():QHeaderView(Qt::Vertical)
{}
void paintSection(QPainter * painter, const QRect & rect, int logicalIndex) const
{
QBrush brush;
if(logicalIndex == 0)
brush.setColor(QColor(Qt::red));
else
brush.setColor(QColor(Qt::blue));
painter->fillRect(rect, brush);
QPen pen(Qt::white);
painter->setPen(pen);
painter->drawText(rect,QString("Row %1").arg(logicalIndex));
}
};
Next set an instance of HeaderView as the vertical header of the QTableView:
HeaderView vView;
tableview.setVerticalHeader(&vView);
I want to create a personalized UI with my Qt application. For this reason I want to edit the default window frame that you can see at any type of window application.
The application that contains the default window title and frame:
http://0000.2.img98.net/out.php/i12977_with-default-title-and-frame.jpg
The application that edit the window title and frame:
http://0000.2.img98.net/out.php/i12978_without-defualt-title-andframe.jpg
You need to create a new class derived from QWidget, and pass Qt::FramelessWindowHint argument to QWidget constructor, like this:
class MyWidget : public QWidget {
public:
MyWidget(QWidget* parent) : QWidget(parent, Qt::FramelessWindowHint) {...}
After it you need to reimplement QWidget::paintEvent (QPaintEvent * event) and draw any design you want.
For example, you have main window design as a PNG image.
class MyWidget : public QWidget {
Q_OBJECT
private:
QPushButton* button;
QLabel* label;
QComboBox* combobox;
QPixmap pixmap;
public:
explicit MyWidget(QWidget *parent = 0) : QWidget(parent, Qt::FramelessWindowHint) {
// Create some controls
button = new QPushButton();
label = new QLabel();
combobox = new QComboBox();
QVBoxLayout* l = new QVBoxLayout();
l->addWidget(button);
l->addWidget(label);
l->addWidget(combobox);
setLayout(l);
resize (500, 500);
setAttribute(Qt::WA_TranslucentBackground); // enable translucent background
pixmap = QPixmap("./1.png"); // load design picture
};
protected:
virtual void paintEvent (QPaintEvent* event) {
painter.setPen(Qt::NoPen);
painter.setBrush(QColor(0, 0, 0, 0));
painter.drawRect(this->rect());
painter.drawPixmap(this->rect(), pixmap, pixmap.rect());
};
Since we don't see a titlebar, we need to implement window drag operation:
private:
bool pressed;
QPoint mousePressPoint;
protected:
virtual void mousePressEvent ( QMouseEvent * event ) {
QWidget::mousePressEvent(event);
if (!pressed) {
pressed = true;
mousePressPoint = event->pos();
}
}
virtual void mouseMoveEvent ( QMouseEvent * event ) {
QWidget::mouseMoveEvent(event);
if (pressed) {move(event->globalPos() - mousePressPoint);}
}
virtual void mouseReleaseEvent ( QMouseEvent * event ) {
QWidget::mouseReleaseEvent(event);
if (pressed) {pressed = false;}
}