guiutil.h

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// Copyright (c) 2011-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef BITCOIN_QT_GUIUTIL_H
#define BITCOIN_QT_GUIUTIL_H
 
#include "amount.h"
 
#include <QEvent>
#include <QHeaderView>
#include <QMessageBox>
#include <QObject>
#include <QProgressBar>
#include <QString>
#include <QTableView>
#include <QLabel>
 
#include <boost/filesystem.hpp>
 
class QValidatedLineEdit;
class SendCoinsRecipient;
 
QT_BEGIN_NAMESPACE
class QAbstractItemView;
class QDateTime;
class QFont;
class QLineEdit;
class QUrl;
class QWidget;
QT_END_NAMESPACE
 
namespace GUIUtil
{
    // Create human-readable string from date
    QString dateTimeStr(const QDateTime &datetime);
    QString dateTimeStr(qint64 nTime);
 
    // Return a monospace font
    QFont fixedPitchFont();
 
    // Set up widgets for address and amounts
    void setupAddressWidget(QValidatedLineEdit *widget, QWidget *parent);
    void setupAmountWidget(QLineEdit *widget, QWidget *parent);
 
    // Parse "bitcoin:" URI into recipient object, return true on successful parsing
    bool parseBitcoinURI(const QUrl &uri, SendCoinsRecipient *out);
    bool parseBitcoinURI(QString uri, SendCoinsRecipient *out);
    QString formatBitcoinURI(const SendCoinsRecipient &info);
 
    // Returns true if given address+amount meets "dust" definition
    bool isDust(const QString& address, const CAmount& amount);
 
    // HTML escaping for rich text controls
    QString HtmlEscape(const QString& str, bool fMultiLine=false);
    QString HtmlEscape(const std::string& str, bool fMultiLine=false);
 
    void copyEntryData(QAbstractItemView *view, int column, int role=Qt::EditRole);
 
    QList<QModelIndex> getEntryData(QAbstractItemView *view, int column);
 
    void setClipboard(const QString& str);
 
    QString getSaveFileName(QWidget *parent, const QString &caption, const QString &dir,
        const QString &filter,
        QString *selectedSuffixOut);
 
    QString getOpenFileName(QWidget *parent, const QString &caption, const QString &dir,
        const QString &filter,
        QString *selectedSuffixOut);
 
    Qt::ConnectionType blockingGUIThreadConnection();
 
    // Determine whether a widget is hidden behind other windows
    bool isObscured(QWidget *w);
 
    // Open debug.log
    void openDebugLogfile();
 
    // Replace invalid default fonts with known good ones
    void SubstituteFonts(const QString& language);
 
    class ToolTipToRichTextFilter : public QObject
    {
        Q_OBJECT
 
    public:
        explicit ToolTipToRichTextFilter(int size_threshold, QObject *parent = 0);
 
    protected:
        bool eventFilter(QObject *obj, QEvent *evt);
 
    private:
        int size_threshold;
    };
 
    class TableViewLastColumnResizingFixer: public QObject
    {
        Q_OBJECT
 
        public:
            TableViewLastColumnResizingFixer(QTableView* table, int lastColMinimumWidth, int allColsMinimumWidth, QObject *parent);
            void stretchColumnWidth(int column);
 
        private:
            QTableView* tableView;
            int lastColumnMinimumWidth;
            int allColumnsMinimumWidth;
            int lastColumnIndex;
            int columnCount;
            int secondToLastColumnIndex;
 
            void adjustTableColumnsWidth();
            int getAvailableWidthForColumn(int column);
            int getColumnsWidth();
            void connectViewHeadersSignals();
            void disconnectViewHeadersSignals();
            void setViewHeaderResizeMode(int logicalIndex, QHeaderView::ResizeMode resizeMode);
            void resizeColumn(int nColumnIndex, int width);
 
        private Q_SLOTS:
            void on_sectionResized(int logicalIndex, int oldSize, int newSize);
            void on_geometriesChanged();
    };
 
    bool GetStartOnSystemStartup();
    bool SetStartOnSystemStartup(bool fAutoStart);
 
    void saveWindowGeometry(const QString& strSetting, QWidget *parent);
    void restoreWindowGeometry(const QString& strSetting, const QSize &defaultSizeIn, QWidget *parent);
 
    /* Convert QString to OS specific boost path through UTF-8 */
    boost::filesystem::path qstringToBoostPath(const QString &path);
 
    /* Convert OS specific boost path to QString through UTF-8 */
    QString boostPathToQString(const boost::filesystem::path &path);
 
    /* Convert seconds into a QString with days, hours, mins, secs */
    QString formatDurationStr(int secs);
 
    /* Format CNodeStats.nServices bitmask into a user-readable string */
    QString formatServicesStr(quint64 mask);
 
    /* Format a CNodeCombinedStats.dPingTime into a user-readable string or display N/A, if 0*/
    QString formatPingTime(double dPingTime);
 
    /* Format a CNodeCombinedStats.nTimeOffset into a user-readable string. */
    QString formatTimeOffset(int64_t nTimeOffset);
 
    QString formatNiceTimeOffset(qint64 secs);
 
    class ClickableLabel : public QLabel
    {
        Q_OBJECT
 
    Q_SIGNALS:
        void clicked(const QPoint& point);
    protected:
        void mouseReleaseEvent(QMouseEvent *event);
    };
    
    class ClickableProgressBar : public QProgressBar
    {
        Q_OBJECT
        
    Q_SIGNALS:
        void clicked(const QPoint& point);
    protected:
        void mouseReleaseEvent(QMouseEvent *event);
    };
 
#if defined(Q_OS_MAC) && QT_VERSION >= 0x050000
    // workaround for Qt OSX Bug:
    // https://bugreports.qt-project.org/browse/QTBUG-15631
    // QProgressBar uses around 10% CPU even when app is in background
    class ProgressBar : public ClickableProgressBar
    {
        bool event(QEvent *e) {
            return (e->type() != QEvent::StyleAnimationUpdate) ? QProgressBar::event(e) : false;
        }
    };
#else
    typedef ClickableProgressBar ProgressBar;
#endif
 
} // namespace GUIUtil
 
#endif // BITCOIN_QT_GUIUTIL_H