Elemi alkalmazások fejlesztése IV. Adatbázis-kezelő GUI alkalmazás készítése 3. Összetett tábla karbantartása

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1 Elemi alkalmazások fejlesztése IV. Adatbázis-kezelő GUI alkalmazás készítése 3. Összetett tábla karbantartása Készítette: Szabóné Nacsa Rozália people.inf.elte.hu/nacsa/eaf4/ Qt

2 Tartalom Alapértelmezett cellaszerkesztő lecserélése (buildingeditor_06) Saját cellaszerkesztő készítés (buildingeditor_07) Egy tábla, több nézet (buildingeditor_08) GUI felület futásidejű testreszabása (buildingeditor_09) 2

3 buildingeditor_06 createeditor() paint() seteditordata() setmodeldata() 3

4 Az App névtér #include <QStringList> namespace App QStringList shoretypes(); ; app.h #include <QStringList> #include "app.h" app.cpp QStringList App::shoreTypes() QStringList ret; ret << QObject::trUtf8("Homokos") << QObject::trUtf8("Kavicsos") << QObject::trUtf8("Sziklás") << QObject::trUtf8("Apró kavicsos") ; return ret; 4

5 Az alkalmazás osztálydiagramja 5

6 BuildingDelegate módosítása class BuildingDelegate : public QSqlRelationalDelegate Q_OBJECT buildingdelegate.h public: BuildingDelegate(int distancecolumn, int shorecolumn, QObject *parent = 0); void paint(qpainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const; QWidget *createeditor(qwidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const; void seteditordata(qwidget *editor, const QModelIndex &index) const; void setmodeldata(qwidget *editor, QAbstractItemModel *model, const QModelIndex &index) const; private: int distancecolumn; int shorecolumn; ; 6

7 BuildingDelegate módosítása... #include "app.h" buildingdelegate.cpp BuildingDelegate::BuildingDelegate(int distancecolumn, int shorecolumn, QObject *parent) : QSqlRelationalDelegate(parent) this >distancecolumn = distancecolumn; this >shorecolumn = shorecolumn; 7

8 BuildingDelegate: paint(...) void BuildingDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,const QModelIndex &index) const if(index.column() == distancecolumn)... else if(index.column() == shorecolumn) int i = index.model() >data(index,qt::displayrole).toint(); QString text = App::shoreTypes().at(i); QStyleOptionViewItem myoption = option; myoption.displayalignment = Qt::AlignCenter Qt::AlignVCenter; drawdisplay(painter,myoption,myoption.rect, text); drawfocus(painter, myoption, myoption.rect); buildingdelegate.cpp else QItemDelegate::paint(painter, option, index); 8

9 BuildingDelegate: createeditor(...) buildingdelegate.cpp QWidget *BuildingDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const if (index.column() == shorecolumn) QComboBox *shoreedit = new QComboBox(parent); shoreedit >additems(app::shoretypes()); return shoreedit; else return QSqlRelationalDelegate::createEditor(parent, option, index) ; 9

10 BuildingDelegate: seteditordata(), setmodeldata() void BuildingDelegate::setEditorData(QWidget *editor, buildingdelegate.cpp const QModelIndex &index) const if (index.column() == shorecolumn) int i = index.model() >data(index, Qt::DisplayRole).toInt(); QComboBox *shoreedit = qobject_cast<qcombobox *>(editor); shoreedit >setcurrentindex(i); else QSqlRelationalDelegate::setEditorData(editor, index); void BuildingDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const if (index.column() == shorecolumn) QComboBox *shoreedit = qobject_cast<qcombobox *>(editor); model >setdata(index, shoreedit >currentindex ()); else QSqlRelationalDelegate::setModelData(editor, model, index); 10

11 BuildingDelegate: setdefaultvalues(...) buildingdelegate.cpp void BuildingModel::setDefaultValues(int row) setdata(index(row, Column::Building_City),"Jesolo",Qt::DisplayRole); setdata(index(row, Column::Building_City),2, Qt::EditRole); //setdata(index(row, Column::Building_Shore),1); setdata(index(row, Column::Building_Shore),"kavicsos", Qt::DisplayRole); setdata(index(row, Column::Building_Shore),1, Qt::EditRole); setdata(index(row, Column::Building_Features),3); 11

12 BuildingTableView: delegáló lecserélése buildingdelegate.cpp BuildingTableView::BuildingTableView(QWidget* parent) : QTableView(parent) setselectionbehavior(qabstractitemview::selectitems); setcurrentrow( 1); setcurrentcolumn(column::building_name); //setitemdelegate(new QSqlRelationalDelegate(this)); //setitemdelegate(new BuildingDelegate(Column::Building_Sea_Distance,this)); setitemdelegate( new BuildingDelegate(Column::Building_Sea_Distance,Column::Building_Shore,this)); 12

13 Projekt leíró fájl módosítása buildingeditor.pro TEMPLATE = app TARGET = DEPENDPATH +=. INCLUDEPATH +=. QT += sql # Input HEADERS += buildingform.h buildingmodel.h buildingtableview.h connection.h generateid.h column.h buildingdelegate.h cityform.h app.h FORMS += buildingform.ui cityform.ui SOURCES += main.cpp buildingform.cpp buildingmodel.cpp buildingtableview.cpp buildingdelegate.cpp cityform.cpp app.cpp 13

14 Saját cellaszerkesztő készítése (buildingeditor_07) createeditor() paint() seteditordata() setmodeldata() CheckListView osztály 14

15 CheckListView osztály class CheckListView : public QWidget Q_OBJECT checklistview.h public: CheckListView(const QStringList &questions = QStringList(), int checksum=0, int columncount=1, QWidget *parent = 0); CheckListView(QWidget *parent = 0); void newchecklistview(const QStringList &questions, int checksum=0, int columncount=1); int getchecksum() return _checksum; QStringList questions() return _questions;... private: void createcheckboxes(); void removecheckboxes(); void init(); class QCheckBox; class QGridLayout; class QVBoxLayout; class QHBoxLayout; typedef QList<QCheckBox*> CheckBoxList; QStringList _questions; int _checksum; int _columncount; QLabel* label; QGridLayout *checkboxlayout; QVBoxLayout* vboxlayout; QHBoxLayout* hboxlayout; CheckBoxList checkboxlist; ; 15

16 CheckListView osztály class CheckListView : public QWidget Q_OBJECT checklistview.h public: CheckListView(const QStringList &questions = QStringList(), int checksum=0, int columncount=1, QWidget *parent = 0);... public slots: void setchecksum(int checksum); void setchecksum ( const QModelIndex & index); void setcolumncount(int columncount); QString tostring(); private slots: void updatecheckstates(); void updatechecksum(); void repaintcheckboxes(); protected: void closeevent ( QCloseEvent * event ); signals: void checksumchanged(); void columncountchanged(); void editingfinished();... ; 16

17 CheckListView osztály class CheckListView : public QWidget Q_OBJECT checklistview.h public: CheckListView(const QStringList &questions = QStringList(), int checksum=0, int columncount=1, QWidget *parent = 0);... public slots: void setchecksum(int checksum); void setchecksum ( const QModelIndex & index); void setcolumncount(int columncount); QString tostring(); private slots: void updatecheckstates(); void updatechecksum(); void repaintcheckboxes(); protected: void closeevent ( QCloseEvent * event ); signals: void checksumchanged(); void columncountchanged(); void editingfinished();... ; 17

18 CheckListView osztály: definíció CheckListView::CheckListView(QWidget *parent) : QWidget(parent),_questions(QStringList("")), _checksum(0), _columncount(1) init(); checklistview.cpp CheckListView::CheckListView(const QStringList &questions, int checksum, int columncount, QWidget *parent) : QWidget(parent), _questions(questions), _checksum(checksum), _columncount(columncount) init(); 18

19 CheckListView osztály void CheckListView::init() label = new QLabel(); checkboxlayout = new QGridLayout; vboxlayout = new QVBoxLayout();... checklistview.cpp vboxlayout >addwidget(label); vboxlayout >addlayout(checkboxlayout);... hboxlayout >additem(new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum)); hboxlayout >addlayout(vboxlayout); hboxlayout >additem(new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum)); setlayout(hboxlayout); connect(this, SIGNAL(checkSumChanged()), this, SLOT(updateCheckStates())); connect(this, SIGNAL(columnCountChanged()), this, SLOT(repaintCheckBoxes())); newchecklistview(_questions,_checksum,_columncount); 19

20 CheckListView osztály void CheckListView::newCheckListView(const QStringList &questions, int checksum, int columncount) _checksum = checksum; _questions = questions; _columncount = columncount; removecheckboxes(); createcheckboxes(); updatecheckstates(); 20

21 CheckListView osztály void CheckListView::createCheckBoxes( ) QCheckBox *checkbox; checklistview.cpp int k = 0; while (k < questions().size()) int i = (k/_columncount); int j = (k%_columncount); checkbox = new QCheckBox( questions().at(k),this ); checkbox >setobjectname("checkbox" + QString::number(i*_columnCount+j)); checkboxlayout >addwidget(checkbox,i,j); //Registers checkbox to checkboxlayout checkbox >show(); checkboxlist.append(checkbox); //Add checkbox to container connect(checkbox, SIGNAL(stateChanged (int)), this, SLOT(updateCheckSum())); ++k; 21

22 CheckListView osztály void CheckListView::updateCheckStates() int sum = _checksum; for (int i = 0; i < checkboxlist.size(); ++i) checkboxlist.at(i) >setchecked(sum % 2); sum = sum/2; checklistview.cpp void CheckListView::updateCheckSum() int mychecksum = 0; int base = 1; for (int i = 0; i < checkboxlist.size(); ++i) if (checkboxlist.at(i) >ischecked () ) mychecksum = mychecksum + base; base = base*2; setchecksum(mychecksum); 22

23 createeditor() paint() seteditordata() setmodeldata() createeditor() paint() seteditordata() setmodeldata() 23

24 BuildingDelegate: definíció kiegészítése class BuildingDelegate : public QSqlRelationalDelegate Q_OBJECT public: BuildingDelegate(int distancecolumn, int shorecolumn, int featurecolumn, QObject *parent = 0);... private slots: void commitandcloseeditor(); private: int distancecolumn; int shorecolumn; int featurecolumn; ; 24

25 BuildingDelegate: implementáció kiegészítése BuildingDelegate::BuildingDelegate(int distancecolumn, int shorecolumn, int featurecolumn, QObject *parent) : QSqlRelationalDelegate(parent) this >distancecolumn = distancecolumn; this >shorecolumn = shorecolumn; this >featurecolumn = featurecolumn; 25

26 BuildingDelegate: implementáció kiegészítése void BuildingDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,const QModelIndex &index) const if(index.column() == distancecolumn)... else if(index.column() == shorecolumn)... else if(index.column() == featurecolumn) QString text = QString::number(index.model() >data(index,qt::displayrole).toint(),2); QStyleOptionViewItem myoption = option; myoption.displayalignment = Qt::AlignRight Qt::AlignVCenter; drawdisplay(painter,myoption,myoption.rect, text); drawfocus(painter, myoption, myoption.rect); buildingdelegate.cpp else QItemDelegate::paint(painter, option, index); 26

27 BuildingDelegate: implementáció kiegészítése QWidget *BuildingDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const buildingdelegate.cpp if (index.column() == shorecolumn)... else if (index.column() == featurecolumn) CheckListView* checklistviewedit = new CheckListView(0); checklistviewedit >newchecklistview(app::buildingfeatures(),0,1); checklistviewedit >setwindowtitle(trutf8("edit Features")); checklistviewedit >setwindowflags(qt::subwindow); QModelIndex myindex = index.model() >index(index.row(),1); QString text = index.model() >data(myindex,qt::displayrole).tostring(); checklistviewedit >setlabel(text); connect(checklistviewedit, SIGNAL(editingFinished()), this, SLOT(commitAndCloseEditor())); return checklistviewedit; else return QSqlRelationalDelegate::createEditor(parent, option, index) ; 27

28 BuildingDelegate: implementáció kiegészítése void BuildingDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const if (index.column() == shorecolumn)... else if (index.column() == featurecolumn) int checksum = index.model() >data(index, Qt::DisplayRole).toInt(); CheckListView *featureedit = qobject_cast<checklistview *>(editor); featureedit >setchecksum(checksum); buildingdelegate.cpp else QSqlRelationalDelegate::setEditorData(editor, index); 28

29 BuildingDelegate: implementáció kiegészítése void BuildingDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const if (index.column() == shorecolumn)... buildingdelegate.cpp else if (index.column() == featurecolumn) CheckListView *featureedit = qobject_cast<checklistview *>(editor); int checksum = featureedit >checksum(); model >setdata(index, checksum); else QSqlRelationalDelegate::setModelData(editor, model, index); 29

30 BuildingDelegate: implementáció kiegészítése void BuildingDelegate::commitAndCloseEditor() CheckListView *editor = qobject_cast<checklistview *>(sender()); emit commitdata(editor); emit closeeditor(editor); buildingdelegate.cpp 30

31 BuildingTableView módosítása buildingdelegate.cpp BuildingTableView::BuildingTableView(QWidget* parent) : QTableView(parent) setitemdelegate(new BuildingDelegate(Column::Building_Sea_Distance, Column::Building_Shore,Column::Building_Features,this)); setselectionbehavior(qabstractitemview::selectitems); setcurrentrow( 1); setcurrentcolumn(column::building_name); 31

32 Egy tábla, több nézet (buildingeditor_08) 32

33 Felületterv módosítása Típus Név(objectName) Beállítások, megjegyzés QWidget BuildingForm windowtitle: Edit Buildings QTableView tableview QPushButton addbutton text = &Add QPushButton deletebutton text = &Delete QPushButton quitbutton text = &Quit QPushButton editcitybutton text = &Edit City QPushButton nextbutton text = &Next QPushButton prevbutton text = &Prev CheckListView checklistview Promote Widget (checklistview.h) 33

34 buildingform.h class BuildingForm : public QDialog, public Ui_BuildingForm... private slots:... void on_prevbutton_clicked(); void on_nextbutton_clicked(); ; void slotdatachanged ( const QModelIndex & topleft, const QModelIndex & bottomright ); void displayfeatures(int row); 34

35 BuildingForm::BuildingForm(const QString &name, QWidget *parent) : QDialog(parent) buildingform.cpp setupui(this); buildingmodel = new BuildingModel(); buildingtableview >setmodel(buildingmodel); buildingtableview >init(); checklistview >newchecklistview(app::buildingfeatures(),0,1); checklistview >setenabled(false); connect(buildingmodel, SIGNAL(rowCountChanged()), buildingtableview, SLOT(updateSelection())); connect(buildingmodel, SIGNAL(dataChanged ( const QModelIndex &, const QModelIndex & )), this, SLOT(slotDataChanged ( const QModelIndex &, const QModelIndex & ))); connect(buildingtableview,signal(currentrowchanged(int)),this,slot(displayfeatures(int))); buildingmodel >select(); buildingtableview >resizecolumnstocontents(); buildingtableview >setselection(name,buildingtableview >currentcolumn()); 35

36 void BuildingForm::slotDataChanged ( const QModelIndex & topleft, const QModelIndex & bottomright ) Q_UNUSED(bottomRight); if(topleft.column()!= Column::Building_Features) return; checklistview >setchecksum(topleft.model() >data(topleft).toint()); checklistview >setfocus(); buildingform.cpp 36

37 void BuildingForm::displayFeatures(int row) if(row < 0 row >= buildingmodel >rowcount() ) return; buildingform.cpp QModelIndex index; index = buildingmodel >index(row,column::building_name); if(!index.isvalid())return; checklistview >setlabel("available features in " + buildingmodel >data(buildingmodel > index(row,column::building_name),qt::displayrole).tostring()); index = buildingmodel >index(row,column::building_features); if(!index.isvalid()) return; checklistview >setchecksum(buildingmodel >data(index,qt::displayrole).toint()); 37

38 Alkalmazás futásidejű testreszabása (buildingeditor_09) 38

39 A bemutatott programok megtalálhatók a people.inf.elte.nacsa/qt4/eaf4/ címen. 39