Adding a graphical user interface around a QGLViewer
.
Qt's designer
has been used to create a very simple interface example, described by a
.ui
user interface description file.
Install the QGLViewer designer plugin so that the QGLViewer appears in the designer's widgets
tabs. You can then connect signals and slots to and from the viewer. The viewer is fully
functional and can be manipulated when you test your interface in designer
.
The plugin code is in the designerPlugin
directory. Start from there to create
plugins for the classes you will derive from QGLViewer. Select your architecture in the download page for details on the plugin compilation and installation.
Here we use three slots and three signals (axis, grid and fps) to connect to and from the interface and the viewer.
#include <QGLViewer/qglviewer.h> class Viewer : public QGLViewer { public : Viewer(QWidget *parent); protected : virtual void draw(); virtual QString helpString() const; };
#include "interface.h" #include <math.h> // Constructor must call the base class constructor. Viewer::Viewer(QWidget *parent) : QGLViewer(parent) { restoreStateFromFile(); help(); } void Viewer::draw() { // Draws a spiral const float nbSteps = 200.0; glBegin(GL_QUAD_STRIP); for (float i=0; i<nbSteps; ++i) { float ratio = i/nbSteps; float angle = 21.0*ratio; float c = cos(angle); float s = sin(angle); float r1 = 1.0 - 0.8*ratio; float r2 = 0.8 - 0.8*ratio; float alt = ratio - 0.5; const float nor = .5; const float up = sqrt(1.0-nor*nor); glColor3f(1.0-ratio, 0.2f , ratio); glNormal3f(nor*c, up, nor*s); glVertex3f(r1*c, alt, r1*s); glVertex3f(r2*c, alt+0.05, r2*s); } glEnd(); } QString Viewer::helpString() const { QString text("<h2>I n t e r f a c e</h2>"); text += "A GUI can be added to a QGLViewer widget using Qt's <i>Designer</i>. Signals and slots "; text += "can then be connected to and from the viewer.<br><br>"; text += "You can install the QGLViewer designer plugin to make the QGLViewer appear as a "; text += "standard Qt widget in the Designer's widget tabs. See installation pages for details."; return text; }
/******************************************************************************** ** Form generated from reading UI file 'viewerInterface.ui' ** ** Created by: Qt User Interface Compiler version 5.2.0 ** ** WARNING! All changes made in this file will be lost when recompiling UI file! ********************************************************************************/ #ifndef UI_VIEWERINTERFACE_H #define UI_VIEWERINTERFACE_H #include <QtCore/QVariant> #include <QtWidgets/QAction> #include <QtWidgets/QApplication> #include <QtWidgets/QButtonGroup> #include <QtWidgets/QCheckBox> #include <QtWidgets/QDialog> #include <QtWidgets/QHBoxLayout> #include <QtWidgets/QHeaderView> #include <QtWidgets/QPushButton> #include <QtWidgets/QSpacerItem> #include <QtWidgets/QVBoxLayout> #include "interface.h" QT_BEGIN_NAMESPACE class Ui_Dialog { public: QVBoxLayout *vboxLayout; Viewer *viewer; QHBoxLayout *hboxLayout; QCheckBox *FPSCheckBox; QCheckBox *GridCheckBox; QCheckBox *AxisCheckBox; QSpacerItem *spacerItem; QPushButton *cancelButton; void setupUi(QDialog *Dialog) { if (Dialog->objectName().isEmpty()) Dialog->setObjectName(QStringLiteral("Dialog")); Dialog->resize(650, 468); vboxLayout = new QVBoxLayout(Dialog); vboxLayout->setObjectName(QStringLiteral("vboxLayout")); vboxLayout->setContentsMargins(8, 8, 8, 8); viewer = new Viewer(Dialog); viewer->setObjectName(QStringLiteral("viewer")); QSizePolicy sizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred); sizePolicy.setHorizontalStretch(0); sizePolicy.setVerticalStretch(1); sizePolicy.setHeightForWidth(viewer->sizePolicy().hasHeightForWidth()); viewer->setSizePolicy(sizePolicy); vboxLayout->addWidget(viewer); hboxLayout = new QHBoxLayout(); hboxLayout->setObjectName(QStringLiteral("hboxLayout")); FPSCheckBox = new QCheckBox(Dialog); FPSCheckBox->setObjectName(QStringLiteral("FPSCheckBox")); hboxLayout->addWidget(FPSCheckBox); GridCheckBox = new QCheckBox(Dialog); GridCheckBox->setObjectName(QStringLiteral("GridCheckBox")); hboxLayout->addWidget(GridCheckBox); AxisCheckBox = new QCheckBox(Dialog); AxisCheckBox->setObjectName(QStringLiteral("AxisCheckBox")); hboxLayout->addWidget(AxisCheckBox); spacerItem = new QSpacerItem(141, 31, QSizePolicy::Expanding, QSizePolicy::Minimum); hboxLayout->addItem(spacerItem); cancelButton = new QPushButton(Dialog); cancelButton->setObjectName(QStringLiteral("cancelButton")); hboxLayout->addWidget(cancelButton); vboxLayout->addLayout(hboxLayout); retranslateUi(Dialog); QObject::connect(cancelButton, SIGNAL(clicked()), Dialog, SLOT(reject())); QObject::connect(FPSCheckBox, SIGNAL(clicked(bool)), viewer, SLOT(setFPSIsDisplayed(bool))); QObject::connect(AxisCheckBox, SIGNAL(clicked(bool)), viewer, SLOT(setAxisIsDrawn(bool))); QObject::connect(GridCheckBox, SIGNAL(clicked(bool)), viewer, SLOT(setGridIsDrawn(bool))); QObject::connect(viewer, SIGNAL(gridIsDrawnChanged(bool)), GridCheckBox, SLOT(setChecked(bool))); QObject::connect(viewer, SIGNAL(axisIsDrawnChanged(bool)), AxisCheckBox, SLOT(setChecked(bool))); QObject::connect(viewer, SIGNAL(FPSIsDisplayedChanged(bool)), FPSCheckBox, SLOT(setChecked(bool))); QMetaObject::connectSlotsByName(Dialog); } // setupUi void retranslateUi(QDialog *Dialog) { Dialog->setWindowTitle(QApplication::translate("Dialog", "Interface", 0)); FPSCheckBox->setText(QApplication::translate("Dialog", "FPS", 0)); GridCheckBox->setText(QApplication::translate("Dialog", "Grid", 0)); AxisCheckBox->setText(QApplication::translate("Dialog", "Axis", 0)); cancelButton->setText(QApplication::translate("Dialog", "Quit", 0)); } // retranslateUi }; namespace Ui { class Dialog: public Ui_Dialog {}; } // namespace Ui QT_END_NAMESPACE #endif // UI_VIEWERINTERFACE_H
#include <qapplication.h> #include "ui_viewerInterface.h" class ViewerInterface : public QDialog, public Ui::Dialog { public: ViewerInterface() { setupUi(this); } }; int main(int argc, char** argv) { QApplication application(argc,argv); ViewerInterface vi; vi.setWindowTitle("interface"); vi.show(); return application.exec(); }
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