C++ QCustomPlot::setCursor方法代码示例

void SequenceDialog::mouseMoved(QMouseEvent *event)
{
    QCustomPlot *sp = ui->sequencePlot;
    Qt::CursorShape shape = Qt::ArrowCursor;
    if (event) {
        if (event->buttons().testFlag(Qt::LeftButton)) {
            shape = Qt::ClosedHandCursor;
        } else {
            if (sp->axisRect()->rect().contains(event->pos())) {
                shape = Qt::OpenHandCursor;
            }
        }
    }
    sp->setCursor(QCursor(shape));

    packet_num_ = 0;
    QString hint;
    if (event) {
        seq_analysis_item_t *sai = seq_diagram_->itemForPosY(event->pos().y());
        if (sai) {
            packet_num_ = sai->fd->num;
            hint = QString("Packet %1: %2").arg(packet_num_).arg(sai->comment);
        }
    }

    if (hint.isEmpty()) {
        hint += tr("%Ln node(s)", "", seq_analysis_.num_nodes) + QString(", ")
                + tr("%Ln item(s)", "", num_items_);
    }

    hint.prepend("<small><i>");
    hint.append("</i></small>");
    ui->hintLabel->setText(hint);
}

void SequenceDialog::diagramClicked(QMouseEvent *event)
{
    QCustomPlot *sp = ui->sequencePlot;

    if (event->button() == Qt::RightButton) {
        // XXX We should find some way to get sequenceDiagram to handle a
        // contextMenuEvent instead.
        ctx_menu_.exec(event->globalPos());
    } else if (sp->axisRect()->rect().contains(event->pos())) {
        sp->setCursor(QCursor(Qt::ClosedHandCursor));
    }
    on_actionGoToPacket_triggered();
}

void LteRlcGraphDialog::mouseReleased(QMouseEvent *event)
{
    QCustomPlot *rp = ui->rlcPlot;
    if (rubber_band_) {
        rubber_band_->hide();
        if (!mouse_drags_) {
            QRectF zoom_ranges = getZoomRanges(QRect(rb_origin_, event->pos()));
            if (zoom_ranges.width() > 0.0 && zoom_ranges.height() > 0.0) {
                rp->xAxis->setRangeLower(zoom_ranges.x());
                rp->xAxis->setRangeUpper(zoom_ranges.x() + zoom_ranges.width());
                rp->yAxis->setRangeLower(zoom_ranges.y());
                rp->yAxis->setRangeUpper(zoom_ranges.y() + zoom_ranges.height());
                rp->replot();
            }
        }
    } else if (rp->cursor().shape() == Qt::ClosedHandCursor) {
        rp->setCursor(QCursor(Qt::OpenHandCursor));
    }
}

void TCPStreamDialog::graphClicked(QMouseEvent *event)
{
    QCustomPlot *sp = ui->streamPlot;

    if (event->button() == Qt::RightButton) {
        // XXX We should find some way to get streamPlot to handle a
        // contextMenuEvent instead.
        ctx_menu_.exec(event->globalPos());
    } else  if (mouse_drags_) {
        if (sp->axisRect()->rect().contains(event->pos())) {
            sp->setCursor(QCursor(Qt::ClosedHandCursor));
        }
        on_actionGoToPacket_triggered();
    } else {
        if (!rubber_band_) {
            rubber_band_ = new QRubberBand(QRubberBand::Rectangle, sp);
        }
        rb_origin_ = event->pos();
        rubber_band_->setGeometry(QRect(rb_origin_, QSize()));
        rubber_band_->show();
    }
}

void LteRlcGraphDialog::mouseMoved(QMouseEvent *event)
{
    QCustomPlot *rp = ui->rlcPlot;
    Qt::CursorShape shape = Qt::ArrowCursor;

    // Set the cursor shape.
    if (event) {
        if (event->buttons().testFlag(Qt::LeftButton)) {
            if (mouse_drags_) {
                shape = Qt::ClosedHandCursor;
            } else {
                shape = Qt::CrossCursor;
            }
        } else if (rp->axisRect()->rect().contains(event->pos())) {
            if (mouse_drags_) {
                shape = Qt::OpenHandCursor;
            } else {
                shape = Qt::CrossCursor;
            }
        }
        rp->setCursor(QCursor(shape));
    }

    // Trying to let 'hint' grow efficiently.  Still pretty slow for a dense graph...
    QString hint;
    hint.reserve(128);
    hint = "<small><i>";

    if (mouse_drags_) {
        double tr_key = tracer_->position->key();
        struct rlc_segment *packet_seg = NULL;
        packet_num_ = 0;

        // XXX If we have multiple packets with the same timestamp tr_key
        // may not return the packet we want. It might be possible to fudge
        // unique keys using nextafter().
        if (event && tracer_->graph() && tracer_->position->axisRect()->rect().contains(event->pos())) {
            packet_seg = time_stamp_map_.value(tr_key, NULL);
        }

        if (!packet_seg) {
            tracer_->setVisible(false);
            hint += "Hover over the graph for details. </i></small>";
            ui->hintLabel->setText(hint);
            ui->rlcPlot->replot(QCustomPlot::rpQueued);
            return;
        }

        tracer_->setVisible(true);
        packet_num_ = packet_seg->num;
        hint += tr("%1 %2 (%3s seq %4 len %5)")
                .arg(cap_file_.capFile() ? tr("Click to select packet") : tr("Packet"))
                .arg(packet_num_)
                .arg(QString::number(packet_seg->rel_secs + packet_seg->rel_usecs / 1000000.0, 'g', 4))
                .arg(packet_seg->SN)
                .arg(packet_seg->pduLength);
        tracer_->setGraphKey(ui->rlcPlot->xAxis->pixelToCoord(event->pos().x()));
        // Redrawing the whole graph is making the update *very* slow!
        // TODO: Is there a way just to draw the parts that may have changed?
        // In the GTK version, we displayed the stored pixbuf and draw temporary items on top...
        rp->replot(QCustomPlot::rpQueued);

    } else {
        if (event && rubber_band_ && rubber_band_->isVisible()) {
            rubber_band_->setGeometry(QRect(rb_origin_, event->pos()).normalized());
            QRectF zoom_ranges = getZoomRanges(QRect(rb_origin_, event->pos()));
            if (zoom_ranges.width() > 0.0 && zoom_ranges.height() > 0.0) {
                hint += tr("Release to zoom, x = %1 to %2, y = %3 to %4")
                        .arg(zoom_ranges.x())
                        .arg(zoom_ranges.x() + zoom_ranges.width())
                        .arg(zoom_ranges.y())
                        .arg(zoom_ranges.y() + zoom_ranges.height());
            } else {
                hint += tr("Unable to select range.");
            }
        } else {
            hint += tr("Click to select a portion of the graph.");
        }
    }

    hint.append("</i></small>");
    ui->hintLabel->setText(hint);
}

// Setting mouseTracking on our streamPlot may not be as reliable
// as we need. If it's not we might want to poll the mouse position
// using a QTimer instead.
void TCPStreamDialog::mouseMoved(QMouseEvent *event)
{
    QCustomPlot *sp = ui->streamPlot;
    Qt::CursorShape shape = Qt::ArrowCursor;
    if (event) {
        if (event->buttons().testFlag(Qt::LeftButton)) {
            if (mouse_drags_) {
                shape = Qt::ClosedHandCursor;
            } else {
                shape = Qt::CrossCursor;
            }
        } else {
            if (sp->axisRect()->rect().contains(event->pos())) {
                if (mouse_drags_) {
                    shape = Qt::OpenHandCursor;
                } else {
                    shape = Qt::CrossCursor;
                }
            }
        }
    }
    sp->setCursor(QCursor(shape));

    QString hint = "<small><i>";
    if (mouse_drags_) {
        double tr_key = tracer_->position->key();
        struct segment *packet_seg = NULL;
        packet_num_ = 0;

        // XXX If we have multiple packets with the same timestamp tr_key
        // may not return the packet we want. It might be possible to fudge
        // unique keys using nextafter().
        if (event && tracer_->graph() && tracer_->position->axisRect()->rect().contains(event->pos())) {
            switch (graph_.type) {
            case GRAPH_TSEQ_STEVENS:
            case GRAPH_TSEQ_TCPTRACE:
            case GRAPH_THROUGHPUT:
            case GRAPH_WSCALE:
                packet_seg = time_stamp_map_.value(tr_key, NULL);
                break;
            case GRAPH_RTT:
                packet_seg = sequence_num_map_.value(tr_key, NULL);
            default:
                break;
            }
        }

        if (!packet_seg) {
            tracer_->setVisible(false);
            hint += "Hover over the graph for details. " + stream_desc_ + "</i></small>";
            ui->hintLabel->setText(hint);
            ui->streamPlot->replot();
            return;
        }

        tracer_->setVisible(true);
        packet_num_ = packet_seg->num;
        hint += tr("%1 %2 (%3s len %4 seq %5 ack %6 win %7)")
                .arg(cap_file_ ? tr("Click to select packet") : tr("Packet"))
                .arg(packet_num_)
                .arg(QString::number(packet_seg->rel_secs + packet_seg->rel_usecs / 1000000.0, 'g', 4))
                .arg(packet_seg->th_seglen)
                .arg(packet_seg->th_seq)
                .arg(packet_seg->th_ack)
                .arg(packet_seg->th_win);
        tracer_->setGraphKey(ui->streamPlot->xAxis->pixelToCoord(event->pos().x()));
        sp->replot();
    } else {
        if (rubber_band_ && rubber_band_->isVisible() && event) {
            rubber_band_->setGeometry(QRect(rb_origin_, event->pos()).normalized());
            QRectF zoom_ranges = getZoomRanges(QRect(rb_origin_, event->pos()));
            if (zoom_ranges.width() > 0.0 && zoom_ranges.height() > 0.0) {
                hint += tr("Release to zoom, x = %1 to %2, y = %3 to %4")
                        .arg(zoom_ranges.x())
                        .arg(zoom_ranges.x() + zoom_ranges.width())
                        .arg(zoom_ranges.y())
                        .arg(zoom_ranges.y() + zoom_ranges.height());
            } else {
                hint += tr("Unable to select range.");
            }
        } else {
            hint += tr("Click to select a portion of the graph.");
        }
    }
    hint += " " + stream_desc_ + "</i></small>";
    ui->hintLabel->setText(hint);
}