qt-creator/src/libs/utils/fancylineedit.h

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#ifndef FANCYLINEEDIT_H
#define FANCYLINEEDIT_H

#include "utils_global.h"

#include <QtGui/QLineEdit>

namespace Core {
namespace Utils {

class FancyLineEditPrivate;

/* A line edit with an embedded pixmap on one side that is connected to
 * a menu. Additionally, it can display a grayed hintText (like "Type Here to")
 * when not focussed and empty. When connecting to the changed signals and
 * querying text, one has to be aware that the text is set to that hint
 * text if isShowingHintText() returns true (that is, does not contain
 * valid user input).
 */
class QWORKBENCH_UTILS_EXPORT FancyLineEdit : public QLineEdit
{
    Q_DISABLE_COPY(FancyLineEdit)
    Q_OBJECT
    Q_ENUMS(Side)
    Q_PROPERTY(QPixmap pixmap READ pixmap WRITE setPixmap DESIGNABLE true)
    Q_PROPERTY(Side side READ side WRITE setSide DESIGNABLE isSideStored STORED isSideStored)
    Q_PROPERTY(bool useLayoutDirection READ useLayoutDirection WRITE setUseLayoutDirection DESIGNABLE true)
    Q_PROPERTY(bool menuTabFocusTrigger READ hasMenuTabFocusTrigger WRITE setMenuTabFocusTrigger  DESIGNABLE true)
    Q_PROPERTY(QString hintText READ hintText WRITE setHintText DESIGNABLE true)

public:
    enum Side {Left, Right};

    explicit FancyLineEdit(QWidget *parent = 0);
    ~FancyLineEdit();

    QPixmap pixmap() const;

    void setMenu(QMenu *menu);
    QMenu *menu() const;

    void setSide(Side side);
    Side side() const;

    bool useLayoutDirection() const;
    void setUseLayoutDirection(bool v);

    // Set whether tabbing in will trigger the menu.
    bool hasMenuTabFocusTrigger() const;
    void setMenuTabFocusTrigger(bool v);

    // Hint text that is displayed when no focus is set.
    QString hintText() const;

    bool isShowingHintText() const;

    // Convenience for accessing the text that returns "" in case of isShowingHintText().
    QString typedText() const;

public slots:
    void setPixmap(const QPixmap &pixmap);
    void setHintText(const QString &ht);
    void showHintText();
    void hideHintText();

protected:
    virtual void resizeEvent(QResizeEvent *e);
    virtual void focusInEvent(QFocusEvent *e);
    virtual void focusOutEvent(QFocusEvent *e);

private:
    bool isSideStored() const;
    void updateMenuLabel();
    void positionMenuLabel();
    void updateStyleSheet(Side side);

    FancyLineEditPrivate *m_d;
};

} // namespace Utils
} // namespace Core

#endif // FANCYLINEEDIT_H