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myview.cpp
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#include "myview.h"
#include <QtMath>
#include <QMenu>
#include <QMessageBox>
#include <QApplication>
#include <QClipboard>
#include <QStatusBar>
#include <QInputDialog>
MyView::MyView(QWidget *parent):
QGraphicsView(parent) // 初始化
{
InitView();
InitViewRect();
m_scene = new MyScene(0); //注意this->scene()是 QGraphicsScene*
this->setScene(m_scene);
Cmd = new Command(m_scene);
// 获得主窗口指针的方法,很重要！
m_main = qobject_cast<MainWindow*>(this->topLevelWidget());
m_main->showScale("当前比例为 1:1 ");
connect(this,SIGNAL(customContextMenuRequested(const QPoint&)), this,
SLOT(ShowContextMenu()) );
}
MyView::~MyView()
{
delete m_scene;
delete Cmd;
}
MyScene* MyView::getScene()
{
return m_scene;
}
MainWindow *MyView::getMainWindow()
{
return m_main;
}
void MyView::mousePressEvent(QMouseEvent *event)
{
switch(event->button())
{
case Qt::MidButton:
mode = DRAG;
dragBegin = this->mapToScene(event->pos());
changeCursor("movable");
showStatus("当前为平移模式");
event->accept();
break;
case Qt::LeftButton:
// 窗口坐标转为场景坐标
StartPt = this->mapToScene(event->pos());
if(flag == dragZoom)
{
mode = ZOOM;
}
else if(flag == drawNone)
{
mode = NORMAL;
showStatus("当前为普通模式");
}
else if(flag == drawDraft)
{
showStatus("当前为草图模式");
}
else
{
mode =EDIT;
showStatus("当前为编辑模式");
this->setDragMode(QGraphicsView::NoDrag);
switch (flag)
{
case drawCirPt:
{
CirclePt *pt1 = new CirclePt();
pt1->setPos(StartPt); //这里不是图形坐标，是场景坐标
m_scene->addItem(pt1);
break;
}
case drawCross:
{
CrossPt *pt2 = new CrossPt();
pt2->setPos(StartPt);
m_scene->addItem(pt2);
break;
}
case drawLine:
{
LineVec.push_back(new QGraphicsLineItem(QLineF(StartPt,StartPt)));
LineVec.at(LineCount)->setPen(getPen());
LineVec.at(LineCount)->setFlag(QGraphicsItem::ItemIsSelectable);
m_scene->addItem(LineVec.at(LineCount));
break;
}
case drawRect:
{
RectVec.push_back(new QGraphicsRectItem(QRectF(StartPt,StartPt)));
RectVec.at(RectCount)->setPen(getPen());
RectVec.at(RectCount)->setFlag(QGraphicsItem::ItemIsSelectable);
m_scene->addItem(RectVec.at(RectCount));
break;
}
case drawElli:
{
ElliVec.push_back(new QGraphicsEllipseItem(QRectF(StartPt,StartPt)));
ElliVec.at(ElliCount)->setPen(getPen());
ElliVec.at(ElliCount)->setFlag(QGraphicsItem::ItemIsSelectable);
m_scene->addItem(ElliVec.at(ElliCount));
break;
}
case drawRing:
{
Ring *r = new Ring();
r->setPos(StartPt);
m_scene->addItem(r);
break;
}
case drawText:
{
Text = m_scene->addSimpleText(inputMultiText(m_drawMulti), TextFont);
Text->setFlag(QGraphicsItem::ItemIsSelectable);
Text->setPos(StartPt);
Text->setTransform(QTransform::fromScale(1,-1));
Text->setPen(getPen());
mode = NORMAL; //画完文本后没有releaseEvent的恢复普通模式,只能在这里添加
this->setDragMode(QGraphicsView::RubberBandDrag);
break;
}
default:
break;
}
}
default:
event->ignore();
break;
}
QGraphicsView::mousePressEvent(event);
}
void MyView::mouseMoveEvent(QMouseEvent *event)
{
QPointF dragTrans;
QPointF EndPt = this->mapToScene(event->pos()); // 不能直接mapToScene(pt).y()
QString MousePos = "("+ QString::number(EndPt.x()) +","+ QString::number(EndPt.y()) +")";
switch (mode) {
case NORMAL:
{
m_main->showCoordinate("当前坐标为:"+MousePos);
break; // 需要处理QGraphicsView::mouseMoveEvent
}
case ZOOM:
break;
case DRAG:
{
//Calculate the offset to drag relative to scene coordinates.
dragTrans = dragBegin - EndPt;
viewCenter->moveBy(dragTrans.x(), dragTrans.y());
this->centerOn(viewCenter);
event->accept();
m_main->showCoordinate("当前坐标为:"+MousePos);
break;
}
case EDIT:
{
m_main->showCoordinate("当前坐标为:"+MousePos);
if(flag == drawLine)
{
QLineF newLine;
newLine.setP1(StartPt);
newLine.setP2(EndPt);
LineVec.at(LineCount)->setLine(newLine);
}
else if(flag == drawRect)
{
if( (RectVec.at(RectCount)->rect().y() < EndPt.y() ) &&
(RectVec.at(RectCount)->rect().x() < EndPt.x() ) )
{
QRectF newRect;
newRect.setTopLeft(StartPt);
newRect.setBottomRight(EndPt);
RectVec.at(RectCount)->setRect(newRect);
}
else if((RectVec.at(RectCount)->rect().top() > EndPt.y() )&&
(RectVec.at(RectCount)->rect().left() < EndPt.x() ))
{
QRectF newRect;
newRect.setBottomLeft(StartPt);
newRect.setTopRight(EndPt);
RectVec.at(RectCount)->setRect(newRect);
}
else if((RectVec.at(RectCount)->rect().y() > EndPt.y())&&
(RectVec.at(RectCount)->rect().x() > EndPt.x()))
{
QRectF newRect;
newRect.setBottomRight(StartPt);
newRect.setTopLeft(EndPt);
RectVec.at(RectCount)->setRect(newRect);
}
else if((RectVec.at(RectCount)->rect().top() < EndPt.y())
&&(RectVec.at(RectCount)->rect().left() > EndPt.x()))
{
QRectF newRect;
newRect.setTopRight(StartPt);
newRect.setBottomLeft(EndPt);
RectVec.at(RectCount)->setRect(newRect);
}
}
else if(flag == drawElli)
{
if( (ElliVec.at(ElliCount)->rect().y() < EndPt.y() ) &&
(ElliVec.at(ElliCount)->rect().x() < EndPt.x() ) )
{
QRectF newRect;
newRect.setTopLeft(StartPt);
newRect.setBottomRight(EndPt);
ElliVec.at(ElliCount)->setRect(newRect);
}
else if((ElliVec.at(ElliCount)->rect().top() > EndPt.y() )&&
(ElliVec.at(ElliCount)->rect().left() < EndPt.x() ))
{
QRectF newRect;
newRect.setBottomLeft(StartPt);
newRect.setTopRight(EndPt);
ElliVec.at(ElliCount)->setRect(newRect);
}
else if((ElliVec.at(ElliCount)->rect().y() > EndPt.y())&&
(ElliVec.at(ElliCount)->rect().x() > EndPt.x()))
{
QRectF newRect;
newRect.setBottomRight(StartPt);
newRect.setTopLeft(EndPt);
ElliVec.at(ElliCount)->setRect(newRect);
}
else if((ElliVec.at(ElliCount)->rect().top() < EndPt.y())
&&(ElliVec.at(ElliCount)->rect().left() > EndPt.x()))
{
QRectF newRect;
newRect.setTopRight(StartPt);
newRect.setBottomLeft(EndPt);
ElliVec.at(ElliCount)->setRect(newRect);
}
}
break;
}
default:
event->ignore();
break;
}
// 没有mouseMoveEvent时，能实现橡胶手模式，因为mode=NORMAL,鼠标事件实际是父类的moveEvent
QGraphicsView::mouseMoveEvent(event);
}
void MyView::mouseReleaseEvent(QMouseEvent *event)
{
QPointF ReleasPt = this->mapToScene(event->pos());
switch(event->button())
{
case Qt::MidButton:
mode = NORMAL;
changeCursor(Qt::ArrowCursor);
event->accept();
showStatus("当前为普通模式");
break;
case Qt::LeftButton:
if(mode==ZOOM)
{ //窗口缩放函数,最后的比例参数选择很重要
this->fitInView( QRectF(StartPt,ReleasPt), Qt::KeepAspectRatio);
}
else if(mode==EDIT)
{
if(flag == drawLine)
LineCount++;
else if(flag == drawRect)
RectCount++;
else if(flag == drawElli)
ElliCount++;
mode = NORMAL; // 不加就报错,会多产生moveEvent,为什么
this->setDragMode(QGraphicsView::RubberBandDrag);
}
default:
event->ignore();
break;
}
updateCenterRect();
QGraphicsView::mouseReleaseEvent(event);
}
//视图放大和缩小,可跟随鼠标
void MyView::wheelEvent(QWheelEvent *event)
{
if(event->modifiers() & Qt::ControlModifier)
{
qreal scaleFactor = qPow(2.0, event->delta() / 240.0); // ???
// qDebug()<<event->delta(); 为正负120
this->scale(scaleFactor, scaleFactor);
this->updateCenterRect();
QString t = "当前比例为 "+QString::number(matrix().m11(),'f',2)+":1 ";
m_main->showScale(t); //状态栏显示当前比例
}
else
QGraphicsView::wheelEvent(event);
}
void MyView::keyPressEvent(QKeyEvent *event)
{
if(pressCtrlKey(event, Qt::Key_A))
{
Cmd = new Command(this);
Cmd->SelectAll(true);
}
else if(pressCtrlKey(event, Qt::Key_Return))
setFullView(!m_full);
switch(event->key())
{
case Qt::Key_Space:
this->setNormalMode();
break;
case Qt::Key_Home:
this->Locate();
this->Reset();
break;
case Qt::Key_M :
Cmd = new Command(this);
Cmd->SetMovable(!m_movable);
break;
case Qt::Key_C :
setCatch(!m_catch); //捕捉模式
break;
case Qt::Key_D:
Cmd = new Command(this);
Cmd->CatchPt();
break;
case Qt::Key_Q:
Cmd = new Command(this);
Cmd->Rotate(45);
showStatus("逆时针转45°");
break;
case Qt::Key_E:
Cmd = new Command(this);
Cmd->Rotate(-45);
showStatus("顺时针转45°");
break;
case Qt::Key_Up:
this->Translate(Command::UP);
showStatus("向上平移"+QString::number(m_main->getPace())+"个单位");
break;
case Qt::Key_Down:
this->Translate(Command::DOWN);
showStatus("向下平移"+QString::number(m_main->getPace())+"个单位");
break;
case Qt::Key_Left:
this->Translate(Command::LEFT);
showStatus("向左平移"+QString::number(m_main->getPace())+"个单位");
break;
case Qt::Key_Right:
this->Translate(Command::RIGHT);
showStatus("向右平移"+QString::number(m_main->getPace())+"个单位");
break;
default:
event->ignore();
break;
}
}
//捕捉点,鼠标定位到某个场景点对应的全局坐标
void MyView::catchPt(QPointF pt)
{
//场景坐标转全局坐标：先转为视图坐标，再转为全局坐标
QPointF f= mapFromScene(pt);
f = mapToGlobal(f.toPoint());
QCursor::setPos(f.toPoint());
changeCursor("crosshairs");
}
void MyView::setCatch(bool on)
{
m_catch = on;
if(on)
showStatus("开启捕捉模式");
else
showStatus("关闭捕捉模式");
}
void MyView::setFullView(bool full)
{
m_full = full;
if(full)
m_main->showFullView(true);
else
m_main->showFullView(false);
}
bool MyView::goCatch()
{
return m_catch;
}
// 获得直线的终点
QPointF MyView::getP3()
{
return p2;
}
void MyView::showItemInfo()
{
Cmd = new Command(this);
Cmd->ShowItemInfo();
}
void MyView::DrawPt()
{
if(sender()->objectName() == "act1")
{
flag = drawCirPt;
changeCursor("cross");
showStatus("当前为编辑模式");
}
else if(sender()->objectName() == "act2")
{
flag = drawCross;
changeCursor("cross");
showStatus("当前为编辑模式");
}
else if(sender()->objectName() == "act3")
{
flag = drawPtXY;
changeCursor(Qt::ArrowCursor);
dlg = new PosDialog(this);
dlg->showPt();
if(dlg->exec() != QDialog::Accepted) return;
QPointF pt1 = dlg->getPt();
CirclePt *pt = new CirclePt();
pt->setPos(pt1);
m_scene->addItem(pt);
}
else if(sender()->objectName() == "dividePt")
{
flag = drawDividePt;
changeCursor(Qt::ArrowCursor);
Cmd = new Command(this);
QList<QPointF> Positions = Cmd->getDividePts();
if(Positions.isEmpty()) return;
foreach (QPointF pos, Positions)
{
CirclePt *pt = new CirclePt();
pt->setPos(pos);
m_scene->addItem(pt);
}
setNormalMode();
}
}
void MyView::DrawLine()
{
if(sender()->objectName() == "actLine_1")
{
flag = drawLine;
changeCursor("cross");
showStatus("当前为编辑模式");
}
else if(sender()->objectName() == "actLine_2")
{
flag = drawLineXY;
changeCursor(Qt::ArrowCursor);
dlg = new PosDialog(this);
dlg->showLineXY();
if(dlg->exec() != QDialog::Accepted) return;
QList<QPointF> list = dlg->getLine();
if(list.size()!=2) return;
if(list.at(0)==list.at(1))
{
QMessageBox::warning(0,"出错了","两个点的坐标不能相同!");
return;
}
MyLine* line = new MyLine(0,list.at(0),list.at(1));
line->setView(this);
m_scene->addItem(line);
// m_scene->addLine(QLineF(list.at(0), list.at(1)),getPen())->
// setFlag(QGraphicsItem::ItemIsSelectable);
setNormalMode();
}
else if(sender()->objectName() == "actLine_3")
{
flag = drawLineAH;
changeCursor(Qt::ArrowCursor);
dlg = new PosDialog(this);
dlg->showLineAH();
if(dlg->exec() != QDialog::Accepted) return;
QPointF pt1 = dlg->getPt();
float angle = dlg->getAngle();
float length = dlg->getLength();
if(pt1==QPointF(0,0) || length==0)
{
QMessageBox::warning(0,"出错了","起点的坐标不能为(0,0) !");
return;
}
QLineF line;
line.setP1(pt1); //不能为(0,0),否则直线无效，为什么?
line.setAngle(360-angle);
line.setLength(length);
if(line.isNull())
{
QMessageBox::warning(0,"出错了","直线无效!");
return;
}
p2 = line.p2();
MyLine* L = new MyLine(0, pt1, length, angle);
L->setView(this);
m_scene->addItem(L);
// m_scene->addLine(line, getPen())->setFlag(QGraphicsItem::ItemIsSelectable);
setNormalMode();
}
}
void MyView::DrawRect()
{
if(sender()->objectName()=="actRect_1")
{
flag = drawRect;
changeCursor("cross");
showStatus("当前为编辑模式");
}
else if(sender()->objectName()=="actRect_2")
{
flag = drawRectXY;
changeCursor(Qt::ArrowCursor);
dlg = new PosDialog(this);
dlg->showRectXY();
if(dlg->exec() != QDialog::Accepted) return;
QPointF pt= dlg->getPt();
float *value= dlg->getWH();
// 因为视图对y轴镜像，直接绘图pt是矩形的左下顶点，需要变换
m_scene->addRect(pt.x(),pt.y()-value[1],
value[0],value[1], getPen(),getBrush())->
setFlag(QGraphicsItem::ItemIsSelectable);
delete[] value;
setNormalMode();
}
}
void MyView::DrawEllipse()
{
if(sender()->objectName()=="actEllipse_1")
{
flag = drawElli;
changeCursor("cross");
showStatus("当前为编辑模式");
}
else if(sender()->objectName()=="actEllipse_2")
{
flag =drawElliXY;
changeCursor(Qt::ArrowCursor);
dlg = new PosDialog(this);
dlg->showEllipse();
if(dlg->exec() != QDialog::Accepted) return;
QPointF pt= dlg->getPt();
float *value= dlg->getWH();
// 因为视图对y轴镜像，所以pt是矩形的左下顶点,需要变换
m_scene->addEllipse(pt.x()-value[0]/2, pt.y()-value[1]/2,
value[0], value[1], getPen(), getBrush())->
setFlag(QGraphicsItem::ItemIsSelectable);
delete[] value;
setNormalMode();
}
else if(sender()->objectName()=="ring")
{
flag = drawRing;
changeCursor("cross");
showStatus("当前为编辑模式");
}
}
void MyView::DrawTexts()
{
flag = drawText;
changeCursor("cross");
showStatus("当前为编辑模式");
if(sender()->objectName()=="textAct")
m_drawMulti = false;
else if(sender()->objectName()=="multiTextAct")
m_drawMulti = true;
}
void MyView::ShowContextMenu()
{
QMenu m;
QAction *Normal = m.addAction("重置为普通模式 Space");
QAction *Locate = m.addAction("定位到原点");
QAction *Reset = m.addAction("重置视图 Home");
QAction *Delete = m.addAction("删除");
QAction *Empty = m.addAction("清空重画");
QAction* Info = m.addAction("属性");
Normal->setIcon(QIcon(":/Icon/Icon/normal.png"));
Locate->setIcon(QIcon(":/Icon/Icon/locate.png"));
Reset->setIcon(QIcon(":/Icon/Icon/reset.png"));
Delete->setIcon(QIcon(":/Icon/Icon/delete.png"));
Empty->setIcon(QIcon(":/Icon/Icon/empty.png"));
Info->setIcon(QIcon(":/Icon/Icon/info.png"));
connect(Normal,SIGNAL(triggered(bool)), this, SLOT(setNormalMode()) );
connect(Locate,SIGNAL(triggered(bool)), this, SLOT(Locate()) );
connect(Reset,SIGNAL(triggered(bool)), this, SLOT(Reset()) );
connect(Delete, SIGNAL(triggered(bool)), this, SLOT(Delete()) );
connect(Empty,SIGNAL(triggered(bool)), this, SLOT(Empty()) );
connect(Info, SIGNAL(triggered(bool)), this, SLOT(showItemInfo()) );
m.exec(QCursor::pos());
}
void MyView::setZoomMode(bool on)
{
if(on)
flag = dragZoom;
}
void MyView::setDraftMode(bool on)
{
getScene()->setDraftMode(on);
if(on)
{
m_scene->clear();
flag = drawDraft;
this->setDragMode(QGraphicsView::NoDrag);
m_main->DraftStatusBar(true);
getScene()->UnloadScene();
getScene()->selectPen(getPen());
}
else
{
// 从草图模式进绘图模式，提示是否保存
QMessageBox msg;
msg.setText(tr(" 是否需要保存 ?"));
QPushButton* Save = msg.addButton(tr("保存"), QMessageBox::ActionRole);
QPushButton* NotSave = msg.addButton(tr("不保存"), QMessageBox::ActionRole);
QPushButton* Cancel = msg.addButton(tr("取消"), QMessageBox::ActionRole);
// 不显示最大化和最小化按钮,必须用两行完成
msg.setWindowFlags(msg.windowFlags() & ~Qt::WindowMinMaxButtonsHint);
msg.setWindowFlags(msg.windowFlags() | Qt::WindowStaysOnTopHint);
msg.exec();
// 用qobject_cast转换会出错，但又必须转换
if ((QPushButton*)(msg.clickedButton()) == Cancel)
{
msg.close();
setDraftMode(true);
flag = drawDraft;
m_main->DraftStatusBar(true);
this->showStatus("当前为草图模式");
return;
}
else if((QPushButton*)msg.clickedButton() == Save)
m_main->on_Image_triggered(); // 以图片形式保存草图
else if((QPushButton*)msg.clickedButton() == NotSave)
{;}
m_main->DraftStatusBar(false);
Empty();
Reset();
flag = drawNone;
this->setDragMode(QGraphicsView::RubberBandDrag);
}
}
void MyView::setNormalMode()
{
mode = NORMAL;
flag = drawNone;
changeCursor(Qt::ArrowCursor);
showStatus("切换为普通模式");
}
void MyView::Locate()
{
this->centerOn(0,0);
this->scale(1, 1);
this->updateCenterRect();
catchPt(QPointF(0,0));
changeCursor(Qt::ArrowCursor);
showStatus("鼠标切换至原点");
}
void MyView::Reset()
{
this->resetMatrix();
this->scale(1,-1);
this->centerOn(0,0);
this->updateCenterRect();
showStatus("重置画面");
}
void MyView::Copy()
{
QByteArray ba;
QDataStream s(&ba,QIODevice::WriteOnly);
int count = m_scene->selectedItems().size();
if(count==0) return;
s<< count;
this->getScene()->Export(s,m_scene->selectedItems());
QMimeData * md = new QMimeData();
md->setData("GraphicsItem",ba);
QClipboard *cb = QApplication::clipboard();
cb->setMimeData(md);
m_copied = true;
}
void MyView::Paste()
{
QClipboard *cb = QApplication::clipboard();
const QMimeData * md = cb->mimeData();
QByteArray ba = md->data("GraphicsItem");
if(ba.isEmpty()){
QMessageBox::warning(0,"出错了!","没有复制图形数据");
return;
}
m_scene->clearSelection();
// 鼠标的当前场景坐标,实际是文字“粘贴”的位置,所以用键盘的效果更好
QPointF pos = this->getScenePos();
QDataStream s(ba);
int count;
s>>count;
for(int i=0;i<=count;i++)
{
QString className;
int flags;
QColor c;
int style;
int width;
QPen pen;
QTransform t;
QColor b;
int brushStyle;
QBrush brush;
s>>className; //不能直接用字符串
s >> flags;
// 四种图形的复制基点都是中心点
if(className=="QGraphicsEllipseItem"||className=="QGraphicsRectItem"
|| className=="CrossPt"|| className=="CirclePt")
{
qreal x,y,w,h;
qreal px,py;
s >> x; s >> y;
s >> w; s >> h;
s >> px; s >> py;
s >> c; s >> style; s >> width;
pen.setColor(c);
pen.setStyle(Qt::PenStyle(style) );
pen.setWidth(width);
s >> b; s>>brushStyle;
brush.setColor(b);
brush.setStyle(Qt::BrushStyle(brushStyle) );
if(className=="QGraphicsEllipseItem")
{
QGraphicsEllipseItem* Elli = getScene()->addEllipse(pos.x(),pos.y(),w,h,pen );
Elli->setBrush(brush);
Elli->setFlags(QGraphicsItem::GraphicsItemFlags(flags));
// QPointF movePt = pos - Elli->rect().center();
// t.translate(movePt.x(), movePt.y());
// Elli->setTransform(t,true);
}
else if(className=="QGraphicsRectItem")
{
QGraphicsRectItem* Rect = getScene()->addRect(pos.x(),pos.y(),w,h,pen );
Rect->setBrush(brush);
Rect->setFlags(QGraphicsItem::GraphicsItemFlags(flags));
// QPointF movePt = pos - Rect->rect().center();
// t.translate(movePt.x(), movePt.y());
// Rect->setTransform(t,true);
}
else if(className=="CrossPt")
{
CrossPt *pt = new CrossPt();
pt->setPos(pos);
pt->setFlags(QGraphicsItem::GraphicsItemFlags(flags));
this->getScene()->addItem(pt);
}
else if(className=="CirclePt")
{
CirclePt *pt = new CirclePt();
pt->setPos(pos);
pt->setFlags(QGraphicsItem::GraphicsItemFlags(flags));
this->getScene()->addItem(pt);
}
}
else if(className == "MyLine")
{
QPointF p1,p2,p3;
s>>p1;
s>>p2;
s>>p3;
MyLine* line = new MyLine(0,p1,p3);
line->setView(this);
// QPointF movePt = pos - p2;
// QTransform t;
// t.translate(movePt.x(), movePt.y());
// line->setTransform(t,true);
m_scene->addItem(line);
}
else if(className=="QGraphicsLineItem")
{
qreal x1,y1,x2,y2;
s>>x1; s>>y1; s>>x2; s>>y2;
s >> c; s >> style; s >> width;
pen.setColor(c);
pen.setStyle(Qt::PenStyle(style) );
pen.setWidth(width);
QGraphicsLineItem *Line = getScene()->addLine(x1,y1,x2,y2, pen );
// 复制的是直线的两个端点，只能以中点为基准而平移
QPointF mid = QPointF( (x1+x2)/2, (y1+y2)/2 );
QPointF movePt = pos - mid;
QTransform t;
t.translate(movePt.x(), movePt.y());
Line->setTransform(t,true);
Line->setFlags(QGraphicsItem::GraphicsItemFlags(flags));
}
else if(className == "QGraphicsSimpleTextItem")
{
QString text,family;
qreal fontSizeF;
bool bold;
qreal px,py;
s >> text; s >> family;
s >> fontSizeF; s >> bold;
QFont font;
font.setFamily(family);
font.setPointSize(fontSizeF);
font.setBold(bold);
s >> px; s >> py;
s >> c; s >> style; s >> width;
pen.setColor(c);
pen.setStyle(Qt::PenStyle(style) );
pen.setWidth(width);
QGraphicsSimpleTextItem* Text = m_scene->addSimpleText(text,font);
Text->setFlags(QGraphicsItem::GraphicsItemFlags(flags));
Text->setPos(pos);
Text->setTransform(QTransform::fromScale(1,-1));
Text->setPen(pen);
}
}
}
void MyView::Delete()
{
Cmd = new Command(this);
Cmd->Delete();
}
void MyView::Empty()
{
m_scene->clear();
m_scene->InitScene();
showStatus("已经清空画面");
}
void MyView::Translate(int direction)
{
Cmd = new Command(m_scene);
Cmd->Translate(direction, m_main->getPace());
}
void MyView::updateCenterRect()
{
QRect viewRect = this->viewport()->rect();
// This setPos is necessary because we translate the rect on the mouseMove event handler
// If we update the rect, the shape will still be translated, so we have to return
// it to the centre of the scene.
this->viewCenter->setPos(0, 0);
qgraphicsitem_cast<QGraphicsRectItem*>(this->viewCenter)->setRect(mapToScene(viewRect).boundingRect());
}
void MyView::changeCursor(const QString& shape)
{
QPixmap p;
p.load(":/Shape/Shape/"+shape+".png");
this->viewport()->setCursor(p);
}
void MyView::changeCursor(Qt::CursorShape shape)
{
QCursor c;
c.setShape(shape);
this->viewport()->setCursor(c);
}
//将鼠标的全局坐标转为场景坐标
QPointF MyView::getScenePos()
{
QCursor c;
QPoint cursorPos = c.pos();
QPoint viewPos = this->mapFromGlobal(cursorPos);
QPointF scenePos = this->mapToScene(viewPos);
return scenePos;
}
// 可以与之前的方式做对比
void MyView::showStatus(QString msg)
{
m_main->statusBar()->setFont(QFont("Inconsolata",14));
m_main->statusBar()->showMessage(msg);
}
QString MyView::inputMultiText(bool multi)
{
bool ok;
QString text;
if(multi)
text = QInputDialog::getMultiLineText(0, tr("请输入多行文本"),"",
"第一行\n第二行", &ok);
else
text = QInputDialog::getText(0, tr("请输入单行文本"),"",
QLineEdit::Normal,"text",&ok);
if (ok && !text.isEmpty())
ok = true;
return text;
}
void MyView::InitView()
{
InitParameters();
this->setDragMode(QGraphicsView::RubberBandDrag);
this->setRenderHints(QPainter::HighQualityAntialiasing | QPainter::SmoothPixmapTransform | QPainter::TextAntialiasing);
this->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
this->setContextMenuPolicy(Qt::CustomContextMenu);
//锚点以鼠标为准,放缩时效果跟网络地图一样
this->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
this->setMatrix(QMatrix(1,0,0,-1,0,0)); // x,y轴比例为1:1和1:-1
// qDebug()<<this->transform();
// qDebug()<<matrix().m11() << matrix().m22();
}
void MyView::InitParameters()
{
mode = NORMAL;
flag = drawNone;
m_drawMulti = false;
m_copied = false;
m_movable = false;
m_saved = false;
m_new = false;
m_catch = false;
m_full = false;
LineCount = 0;
RectCount = 0;
ElliCount = 0;
}
void MyView::InitViewRect()
{
//viewCenter用于在moveEvent里拖动画面
QRect viewport_rect(0, 0, viewport()->width(), viewport()->height() ); //98 X 28
QRectF visible_scene_rect = this->mapToScene(viewport_rect).boundingRect();
viewCenter = new QGraphicsRectItem(visible_scene_rect);
this->viewport()->update();
}
int MyView::getPenWidth()
{
PenWidth = m_main->getPenWidth();
return PenWidth;
}
Qt::PenStyle MyView::getPenStyle()
{
PenStyle = m_main->getPenStyle();
return PenStyle;
}
//没在mainwindow里选,则PenColor是invalid
QColor MyView::getColor()
{
PenColor = m_main->getPenColor();
if(!PenColor.isValid())
PenColor = Qt::white;
return PenColor;
}
bool MyView::pressCtrlKey(QKeyEvent *event, int key)
{
bool modifer = (event->modifiers() == Qt::ControlModifier);