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Merge pull request #556 from Tarsnap/ttabwidget
TTabWidget
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| #include "TTabWidgetPlugin.h" | ||
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| #include "TTabWidget.h" | ||
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| TTabWidgetPlugin::TTabWidgetPlugin(QObject *parent) : QObject(parent) | ||
| { | ||
| } | ||
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| QIcon TTabWidgetPlugin::icon() const | ||
| { | ||
| return QIcon(); | ||
| } | ||
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| QString TTabWidgetPlugin::group() const | ||
| { | ||
| return QStringLiteral("Containers"); | ||
| } | ||
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| QString TTabWidgetPlugin::includeFile() const | ||
| { | ||
| return QStringLiteral("TTabWidget.h"); | ||
| } | ||
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| QString TTabWidgetPlugin::name() const | ||
| { | ||
| return QStringLiteral("TTabWidget"); | ||
| } | ||
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| QString TTabWidgetPlugin::toolTip() const | ||
| { | ||
| return QString(); | ||
| } | ||
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| QString TTabWidgetPlugin::whatsThis() const | ||
| { | ||
| return QString(); | ||
| } | ||
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| QWidget *TTabWidgetPlugin::createWidget(QWidget *parent) | ||
| { | ||
| return new TTabWidget(parent); | ||
| } | ||
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| bool TTabWidgetPlugin::isContainer() const | ||
| { | ||
| return false; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| #ifndef TTABWIGETPLUGIN_H | ||
| #define TTABWIGETPLUGIN_H | ||
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| #include "warnings-disable.h" | ||
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| WARNINGS_DISABLE | ||
| #include <QObject> | ||
| #include <QtUiPlugin/QDesignerCustomWidgetInterface> | ||
| WARNINGS_ENABLE | ||
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| class TTabWidgetPlugin : public QObject, public QDesignerCustomWidgetInterface | ||
| { | ||
| Q_OBJECT | ||
| Q_INTERFACES(QDesignerCustomWidgetInterface) | ||
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| public: | ||
| explicit TTabWidgetPlugin(QObject *parent = nullptr); | ||
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| QIcon icon() const override; | ||
| QString group() const override; | ||
| QString includeFile() const override; | ||
| QString name() const override; | ||
| QString toolTip() const override; | ||
| QString whatsThis() const override; | ||
| QWidget *createWidget(QWidget *parent) override; | ||
| bool isContainer() const override; | ||
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| private: | ||
| bool initialized = false; | ||
| }; | ||
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| #endif /* !TTABWIGETPLUGIN_H */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| #include "TTabWidget.h" | ||
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| WARNINGS_DISABLE | ||
| #include <QPainter> | ||
| #include <QPixmap> | ||
| #include <QTabBar> | ||
| #include <QTabWidget> | ||
| WARNINGS_ENABLE | ||
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| class QPaintEvent; | ||
| class QResizeEvent; | ||
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| #define RIGHT_PADDING 3 | ||
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| TTabWidget::TTabWidget(QWidget *parent) | ||
| : QTabWidget(parent), | ||
| _needRecalculate(true), | ||
| _image_x(0), | ||
| _largeLogo(nullptr), | ||
| _smallLogo(nullptr), | ||
| _image(nullptr) | ||
| { | ||
| } | ||
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| TTabWidget::~TTabWidget() | ||
| { | ||
| delete _largeLogo; | ||
| delete _smallLogo; | ||
| } | ||
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| void TTabWidget::setLargeLogoFilename(const QString &largeLogoFilename) | ||
| { | ||
| // Check that we haven't used this before. | ||
| Q_ASSERT(_largeLogo == nullptr); | ||
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| // Save filename and load logo. | ||
| _largeLogoFilename = largeLogoFilename; | ||
| _largeLogo = new QPixmap(_largeLogoFilename); | ||
| _needRecalculate = true; | ||
| } | ||
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| void TTabWidget::setSmallLogoFilename(const QString &smallLogoFilename) | ||
| { | ||
| // Check that we haven't used this before. | ||
| Q_ASSERT(_smallLogo == nullptr); | ||
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| // Save filename and load logo. | ||
| _smallLogoFilename = smallLogoFilename; | ||
| _smallLogo = new QPixmap(_smallLogoFilename); | ||
| _needRecalculate = true; | ||
| } | ||
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| void TTabWidget::resizeEvent(QResizeEvent *event) | ||
| { | ||
| QTabWidget::resizeEvent(event); | ||
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| // We need to recalculate the widths. | ||
| // | ||
| // If this was a perfectly reusable class, we would also recalculate after | ||
| // every ::tabInserted() and ::tabRemoved(). However, this is sufficient | ||
| // for Tarsnap-GUI. | ||
| _needRecalculate = true; | ||
| } | ||
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| void TTabWidget::paintEvent(QPaintEvent *event) | ||
| { | ||
| (void)event; /* UNUSED */ | ||
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| // Update width calculation if necessary. | ||
| if(_needRecalculate) | ||
| recalculateWidth(); | ||
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| // Bail if it's too narrow to draw either logo. | ||
| if(_image == nullptr) | ||
| return; | ||
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| // Draw the selected logo. | ||
| QPainter p(this); | ||
| p.drawPixmap(_image_x, 0, *_image); | ||
| } | ||
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| void TTabWidget::recalculateWidth() | ||
| { | ||
| // We don't need to call this again (unless something else changes). | ||
| _needRecalculate = true; | ||
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| // Bail if we're missing either logo. | ||
| if((!_largeLogo) || (!_smallLogo)) | ||
| return; | ||
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| // How much width is available? | ||
| int remainingWidth = width() - tabBar()->width() - RIGHT_PADDING; | ||
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| // Pick which image (if any) to use. | ||
| if(remainingWidth > _largeLogo->width()) | ||
| _image = _largeLogo; | ||
| else if(remainingWidth > _smallLogo->width()) | ||
| _image = _smallLogo; | ||
| else | ||
| { | ||
| _image = nullptr; | ||
| // It doesn't matter what _image_x is in this case. | ||
| return; | ||
| } | ||
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| // How far along (width-wise) should we draw the logo? | ||
| _image_x = width() - RIGHT_PADDING - _image->width(); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| #ifndef TTABWIDGET_H | ||
| #define TTABWIDGET_H | ||
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| #include "warnings-disable.h" | ||
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| WARNINGS_DISABLE | ||
| #include <QObject> | ||
| #include <QString> | ||
| #include <QTabWidget> | ||
| WARNINGS_ENABLE | ||
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| /* Forward declaration(s). */ | ||
| class QPaintEvent; | ||
| class QPixmap; | ||
| class QResizeEvent; | ||
| class QWidget; | ||
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| /*! | ||
| * \ingroup lib-widgets | ||
| * \brief The TTabWidget widget is a QTabWidget which will display one of two | ||
| * images in the top-right corner. | ||
| * | ||
| * Both largeLogoFilename and smallLogoFilename must be set exactly once. | ||
| * They are essentially arguments to the constructor, but using an indirect | ||
| * route so that TTabWidget can be used in the Qt Designer. | ||
| */ | ||
| class TTabWidget : public QTabWidget | ||
| { | ||
| Q_OBJECT | ||
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| //! Filename of the large icon. Can only be set once. | ||
| Q_PROPERTY(QString largeLogoFilename MEMBER _largeLogoFilename WRITE | ||
| setLargeLogoFilename DESIGNABLE true) | ||
| //! Filename of the small icon. Can only be set once. | ||
| Q_PROPERTY(QString smallLogoFilename MEMBER _smallLogoFilename WRITE | ||
| setSmallLogoFilename DESIGNABLE true) | ||
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| public: | ||
| //! Constructor. | ||
| explicit TTabWidget(QWidget *parent = nullptr); | ||
| ~TTabWidget() override; | ||
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| //! Set the filename of the large icon. | ||
| void setLargeLogoFilename(const QString &largeLogoFilename); | ||
| //! Set the filename of the small icon. | ||
| void setSmallLogoFilename(const QString &smallLogoFilename); | ||
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| protected: | ||
| //! We need to recalculate the available width. | ||
| void resizeEvent(QResizeEvent *event) override; | ||
| //! Draw one of the logos in the top-right corner. | ||
| void paintEvent(QPaintEvent *event) override; | ||
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| private: | ||
| bool _needRecalculate; | ||
| int _image_x; | ||
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| // These are only here so that we can set them in the designer | ||
| QString _largeLogoFilename; | ||
| QString _smallLogoFilename; | ||
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| QPixmap *_largeLogo; | ||
| QPixmap *_smallLogo; | ||
| QPixmap *_image; // Always a pointer to an existing object (or nullptr). | ||
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| void recalculateWidth(); | ||
| }; | ||
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| #endif // TTABWIDGET_H |
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