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Diffstat (limited to 'kalarm/pictdefileradio.h')
| -rw-r--r-- | kalarm/pictdefileradio.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/kalarm/pictdefileradio.h b/kalarm/pictdefileradio.h new file mode 100644 index 000000000..ad6e0c25c --- /dev/null +++ b/kalarm/pictdefileradio.h @@ -0,0 +1,121 @@ +/* + * pictdefileradio.h - radio button with an associated file picker + * Program: kalarm + * Copyright (C) 2005 by David Jarvie <software@astrojar.org.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef PICKFILERADIO_H +#define PICKFILERADIO_H + +/** @file pictdefileradio.h - radio button with an associated file picker */ + +#include "radiobutton.h" + +class TQPushButton; +class LineEdit; + +/** + * @short Radio button with associated file picker controls. + * + * The PickFileRadio class is a radio button with an associated button to choose + * a file, and an optional file name edit box. Its purpose is to ensure that while + * the radio button is selected, the chosen file name is never blank. + * + * To achieve this, whenever the button is newly selected and the + * file name is currently blank, the file picker dialogue is displayed to choose a + * file. If the dialogue exits without a file being chosen, the radio button selection + * is reverted to the previously selected button in the parent button group. + * + * The class handles the activation of the file picker dialogue (via a virtual method + * which must be supplied by deriving a class from this one). It also handles all + * enabling and disabling of the browse button and edit box when the enable state of + * the radio button is changed, and when the radio button selection changes. + * + * @author David Jarvie <software@astrojar.org.uk> + */ +class PickFileRadio : public RadioButton +{ + Q_OBJECT + + public: + /** Constructor. + * @param button Push button to invoke the file picker dialogue. + * @param edit File name edit widget, or null if there is none. + * @param text Radio button's text. + * @param parent Button group which is to be the parent object for the radio button. + * @param name The name of this widget. + */ + PickFileRadio(TQPushButton* button, LineEdit* edit, const TQString& text, TQButtonGroup* parent, const char* name = 0); + /** Constructor. + * The init() method must be called before the widget can be used. + * @param text Radio button's text. + * @param parent Button group which is to be the parent object for the radio button. + * @param name The name of this widget. + */ + PickFileRadio(const TQString& text, TQButtonGroup* parent, const char* name = 0); + /** Initialises the widget. + * @param button Push button to invoke the file picker dialogue. + * @param edit File name edit widget, or null if there is none. + */ + void init(TQPushButton* button, LineEdit* edit = 0); + /** Sets whether the radio button and associated widgets are read-only for the user. + * If read-only, their states cannot be changed by the user. + * @param readOnly True to set the widgets read-only, false to set them read-write. + */ + virtual void setReadOnly(bool readOnly); + /** Chooses a file, for example by displaying a file selection dialogue. + * This method is called when the push button is clicked - the client + * should not activate a file selection dialogue directly. + * @return Selected file name, or TQString() if no selection made. + */ + virtual TQString pickFile() = 0; + /** Notifies the widget of the currently selected file name. + * This should only be used when no file name edit box is used. + * It should be called to initialise the widget's data, and also any time the file + * name is changed without using the push button. + */ + void setFile(const TQString& file); + /** Returns the currently selected file name. */ + TQString file() const; + /** Returns the associated file name edit widget, or null if none. */ + LineEdit* fileEdit() const { return mEdit; } + /** Returns the associated file browse push button. */ + TQPushButton* pushButton() const { return mButton; } + + public slots: + /** Enables or disables the radio button, and adjusts the enabled state of the + * associated browse button and file name edit box. + */ + virtual void setEnabled(bool); + + private slots: + void slotSelectionChanged(int id); + void slotPickFile(); + void setLastId(); + + private: + bool pickFileIfNone(); + + TQButtonGroup* mGroup; // button group which radio button is in + LineEdit* mEdit; // file name edit box, or null if none + TQPushButton* mButton; // push button to pick a file + TQString mFile; // saved file name (if mEdit is null) + int mLastId; // previous radio button selected + bool mRevertId; // true to revert to the previous radio button selection +}; + +#endif // PICKFILERADIO_H |