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/********************************************************************************
* *
* S c r o l l W i n d o w W i d g e t *
* *
*********************************************************************************
* Copyright (C) 1997,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This library 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#ifndef FXSCROLLWINDOW_H
#define FXSCROLLWINDOW_H
#ifndef FXSCROLLAREA_H
#include "FXScrollArea.h"
#endif
namespace FX {
/**
* The ScrollWindow widget manages one single child window and
* scrolls it when the child is larger than the available area.
* You can use ScrollWindow when parts of your user interface need to be
* scrollable, for example when applications may need to run on small screens.
* ScrollWindow normally contains only one single child window, which could
* be a VerticalFrame or any other widget. It will measure this widget using
* getDefaultWidth() and getDefaultHeight() and place the scrollbars when needed,
* based on options like HSCROLLING_ALWAYS, etc., and the options of the child
* window.
* ScrollWindow observes some layout hints of its child window: LAYOUT_FIX_WIDTH,
* LAYOUT_FIX_HEIGHT are observed at all times, while LAYOUT_FILL_X, LAYOUT_LEFT,
* LAYOUT_RIGHT, LAYOUT_CENTER_X, as well as LAYOUT_FILL_Y, LAYOUT_TOP, LAYOUT_BOTTOM,
* LAYOUT_CENTER_Y are only observed if the child window size is smaller than the
* ScrollWindow's viewport size. If the content size is larger than the viewport size,
* the content must be scrolled normally.
* Note that this means that the child window's position is not necessarily equal to
* the scroll position of the scroll window!
*/
class FXAPI FXScrollWindow : public FXScrollArea {
FXDECLARE(FXScrollWindow)
protected:
FXScrollWindow(){}
virtual void moveContents(FXint x,FXint y);
private:
FXScrollWindow(const FXScrollWindow&);
FXScrollWindow &operator=(const FXScrollWindow&);
public:
long onKeyPress(FXObject*,FXSelector,void*);
long onKeyRelease(FXObject*,FXSelector,void*);
long onFocusSelf(FXObject*,FXSelector,void*);
public:
/// Construct a scroll window
FXScrollWindow(FXComposite* p,FXuint opts=0,FXint x=0,FXint y=0,FXint w=0,FXint h=0);
/// Perform layout
virtual void layout();
/// Return a pointer to the contents window
FXWindow* contentWindow() const;
/// Return the width of the contents
virtual FXint getContentWidth();
/// Return the height of the contents
virtual FXint getContentHeight();
};
}
#endif
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