qt: add Open URI dialog

src/qt/guiutil.h

@@ -36,7 +36,6 @@ namespace GUIUtil
     void setupAmountWidget(QLineEdit *widget, QWidget *parent);
 
     // Parse "bitcoin:" URI into recipient object, return true on successful parsing
-    // See Bitcoin URI definition discussion here: https://bitcointalk.org/index.php?topic=33490.0
     bool parseBitcoinURI(const QUrl &uri, SendCoinsRecipient *out);
     bool parseBitcoinURI(QString uri, SendCoinsRecipient *out);
     QString formatBitcoinURI(const SendCoinsRecipient &info);
@@ -70,6 +69,19 @@ namespace GUIUtil
                                    const QString &dir=QString(), const QString &filter=QString(),
                                    QString *selectedSuffixOut=0);
 
+    /** Get open filename, convenience wrapper for QFileDialog::getOpenFileName.
+
+      @param[in] parent  Parent window (or 0)
+      @param[in] caption Window caption (or empty, for default)
+      @param[in] dir     Starting directory (or empty, to default to documents directory)
+      @param[in] filter  Filter specification such as "Comma Separated Files (*.csv)"
+      @param[out] selectedSuffixOut  Pointer to return the suffix (file type) that was selected (or 0).
+                  Can be useful when choosing the save file format based on suffix.
+     */
+    QString getOpenFileName(QWidget *parent, const QString &caption, const QString &dir,
+        const QString &filter,
+        QString *selectedSuffixOut);
+
     /** Get connection type to call object slot in GUI thread with invokeMethod. The call will be blocking.
 
        @returns If called from the GUI thread, return a Qt::DirectConnection.