#include?“axistag.h“

AxisTag::AxisTag（QCPAxis?*parentAxis）?:?Qobject（parentAxis）
????mAxis（parentAxis）
{
????//?The?dummy?tracer?serves?here?as?an?invisible?anchor?which?always?sticks?to?the?right?side?of
??????//?the?axis?rect
??????mDummyTracer?=?new?QCPItemTracer（mAxis->parentPlot（））;
??????mDummyTracer->setVisible（true）;
??????mDummyTracer->position->setTypeX（QCPItemPosition::ptAxisRectRatio）;//QCPItemPosition::ptPlotCoords
??????mDummyTracer->position->setTypeY（QCPItemPosition::ptPlotCoords）;
??????mDummyTracer->position->setAxisRect（mAxis->axisRect（））;
??????mDummyTracer->position->setAxes（0?mAxis）;
?????//?mDummyTracer->position->setCoords（1?1）;

??????//?the?arrow?end?（head）?is?set?to?move?along?with?the?dummy?tracer?by?setting?it?as?its?parent
??????//?anchor.?Its?coordinate?system?（setCoords）?is?thus?pixels?and?this?is?how?the?needed?horizontal
??????//?offset?for?the?tag?of?the?second?y?axis?is?achieved.?This?horizontal?offset?gets?dynamically
??????//?updated?in?AxisTag::updatePosition.?the?arrow?“start“?is?simply?set?to?have?the?“end“?as?parent
??????//?anchor.?It?is?given?a?horizontal?offset?to?the?right?which?results?in?a?15?pixel?long?arrow.
??????mArrow?=?new?QCPItemLine（mAxis->parentPlot（））;
??????mArrow->setlayer（“overlay“）;
??????mArrow->setClipToAxisRect（false）;
??????mArrow->setVisible（false）;
??????mArrow->setHead（QCPLineEnding::esSpikeArrow）;
??????mArrow->end->setParentAnchor（mDummyTracer->position）;
??????mArrow->start->setParentAnchor（mArrow->end）;
??????mArrow->start->setCoords（15?0）;

??????//?The?text?label?is?anchored?at?the?arrow?start?（tail）?and?has?its?“position“?aligned?at?the
??????//?left?and?vertically?centered?to?the?text?label?box.
??????mLabel?=?new?QCPItemText（mAxis->parentPlot（））;
??????mLabel->setlayer（“overlay“）;
??????mLabel->setClipToAxisRect（false）;
??????mLabel->setPadding（QMargins（3?0?3?0））;
??????mLabel->setBrush（QBrush（Qt::white））;
??????mLabel->setPen（QPen（Qt::blue））;
??????mLabel->setPositionAlignment（Qt::AlignLeft|Qt::AlignVCenter）;
??????mLabel->position->setTypeX（QCPItemPosition::ptPlotCoords）;//QCPItemPosition::ptPlotCoords
??????mLabel->position->setTypeY（QCPItemPosition::ptAxisRectRatio）;
??????//mLabel->position->setParentAnchor（mDummyTracer->position）;
}

AxisTag::~AxisTag（）
{
??if?（mDummyTracer）
????mDummyTracer->parentPlot（）->removeItem（mDummyTracer）;
??if?（mArrow）
????mArrow->parentPlot（）->removeItem（mArrow）;
??if?（mLabel）
????mLabel->parentPlot（）->removeItem（mLabel）;
}

void?AxisTag::setPen（const?QPen?&pen）
{
??mArrow->setPen（pen）;
??mLabel->setPen（pen）;
}

void?AxisTag::setBrush（const?QBrush?&brush）
{
??mLabel->setBrush（brush）;
}

void?AxisTag::setText（const?QString?&text）
{
??mLabel->setText（text）;
}

void?AxisTag::updatePosition（double?value）
{
??//?since?both?the?arrow?and?the?text?label?are?chained?to?the?dummy?tracer?（via?anchor
??//?parent-child?relationships）?it?is?sufficient?to?update?the?du

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3950??2018-04-09?14:09??axisTest\axistag.cpp

?????文件????????841??2018-03-30?10:17??axisTest\axistag.h

?????文件????????510??2018-04-08?10:55??axisTest\axisTest.pro

?????文件??????18712??2018-04-12?11:50??axisTest\axisTest.pro.user

?????文件????????183??2018-04-02?10:09??axisTest\main.cpp

?????文件???????5139??2018-04-09?08:49??axisTest\mainwindow.cpp

?????文件????????606??2018-04-08?16:35??axisTest\mainwindow.h

?????文件????????654??2018-03-30?10:09??axisTest\mainwindow.ui

?????文件????1118717??2017-09-04?08:02??axisTest\qcustomplot.cpp

?????文件?????266925??2017-09-04?08:02??axisTest\qcustomplot.h

?????文件???????4207??2018-04-09?14:10??axisTest\tagaxis.cpp

?????文件????????864??2018-04-08?17:28??axisTest\tagaxis.h

?????目錄??????????0??2018-04-17?19:14??axisTest

-----------?---------??----------?-----??----

??????????????1421308????????????????????13