finalcut/src/fscrollview.cpp

1029 lines
26 KiB
C++

/***********************************************************************
* fscrollview.cpp - Widget FScrollView (a scrolling area with *
* on-demand scroll bars) *
* *
* This file is part of the Final Cut widget toolkit *
* *
* Copyright 2017-2018 Markus Gans *
* *
* The Final Cut 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. *
* *
* The Final Cut 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/>. *
***********************************************************************/
#include <memory>
#include "final/fscrollview.h"
#include "final/fwindow.h"
namespace finalcut
{
//----------------------------------------------------------------------
// class FScrollView
//----------------------------------------------------------------------
// constructors and destructor
//----------------------------------------------------------------------
FScrollView::FScrollView (FWidget* parent)
: FWidget(parent)
{
init(parent);
}
//----------------------------------------------------------------------
FScrollView::~FScrollView() // destructor
{
removeArea (viewport);
child_print_area = viewport = nullptr;
}
// public methods of FScrollView
//----------------------------------------------------------------------
void FScrollView::setScrollWidth (std::size_t width)
{
if ( width < getViewportWidth() )
width = getViewportWidth();
if ( getScrollWidth() == width )
return;
if ( viewport )
{
FPoint no_shadow(0, 0);
scroll_geometry.setWidth (width);
resizeArea (scroll_geometry, no_shadow, viewport);
addPreprocessingHandler
(
F_PREPROC_HANDLER (this, &FScrollView::copy2area)
);
child_print_area = viewport;
}
hbar->setMaximum (int(width - getViewportWidth()));
hbar->setPageSize (int(width), int(getViewportWidth()));
hbar->calculateSliderValues();
setHorizontalScrollBarVisibility();
}
//----------------------------------------------------------------------
void FScrollView::setScrollHeight (std::size_t height)
{
if ( height < getViewportHeight() )
height = getViewportHeight();
if ( getScrollHeight() == height )
return;
if ( viewport )
{
FPoint no_shadow(0, 0);
scroll_geometry.setHeight (height);
resizeArea (scroll_geometry, no_shadow, viewport);
addPreprocessingHandler
(
F_PREPROC_HANDLER (this, &FScrollView::copy2area)
);
child_print_area = viewport;
}
vbar->setMaximum (int(height - getViewportHeight()));
vbar->setPageSize (int(height), int(getViewportHeight()));
vbar->calculateSliderValues();
setVerticalScrollBarVisibility();
}
//----------------------------------------------------------------------
void FScrollView::setScrollSize (std::size_t width, std::size_t height)
{
int xoffset_end
, yoffset_end;
if ( width < getViewportWidth() )
width = getViewportWidth();
if ( height < getViewportHeight() )
height = getViewportHeight();
if ( getScrollWidth() == width && getScrollHeight() == height )
return;
if ( viewport )
{
FPoint no_shadow(0, 0);
scroll_geometry.setSize (width, height);
resizeArea (scroll_geometry, no_shadow, viewport);
addPreprocessingHandler
(
F_PREPROC_HANDLER (this, &FScrollView::copy2area)
);
child_print_area = viewport;
}
xoffset_end = int(getScrollWidth() - getViewportWidth());
yoffset_end = int(getScrollHeight() - getViewportHeight());
setTopPadding (1 - getScrollY());
setLeftPadding (1 - getScrollX());
setBottomPadding (1 - (yoffset_end - getScrollY()));
setRightPadding (1 - (xoffset_end - getScrollX()) + int(nf_offset));
hbar->setMaximum (int(width - getViewportWidth()));
hbar->setPageSize (int(width), int(getViewportWidth()));
hbar->calculateSliderValues();
setHorizontalScrollBarVisibility();
vbar->setMaximum (int(height - getViewportHeight()));
vbar->setPageSize (int(height), int(getViewportHeight()));
vbar->calculateSliderValues();
setVerticalScrollBarVisibility();
}
//----------------------------------------------------------------------
void FScrollView::setX (int x, bool adjust)
{
FWidget::setX (x, adjust);
if ( ! adjust )
{
scroll_geometry.setX (getTermX() + getLeftPadding() - 1);
if ( viewport )
{
viewport->offset_left = scroll_geometry.getX();
viewport->offset_top = scroll_geometry.getY();
}
}
}
//----------------------------------------------------------------------
void FScrollView::setY (int y, bool adjust)
{
FWidget::setY (y, adjust);
if ( ! adjust )
{
scroll_geometry.setY (getTermY() + getTopPadding() - 1);
if ( viewport )
{
viewport->offset_left = scroll_geometry.getX();
viewport->offset_top = scroll_geometry.getY();
}
}
}
//----------------------------------------------------------------------
void FScrollView::setPos (int x, int y, bool adjust)
{
FWidget::setPos (x, y, adjust);
scroll_geometry.setPos ( getTermX() + getLeftPadding() - 1
, getTermY() + getTopPadding() - 1 );
if ( ! adjust )
{
if ( viewport )
{
viewport->offset_left = scroll_geometry.getX();
viewport->offset_top = scroll_geometry.getY();
}
}
}
//----------------------------------------------------------------------
void FScrollView::setWidth (std::size_t w, bool adjust)
{
FWidget::setWidth (w, adjust);
viewport_geometry.setWidth(w - vertical_border_spacing - nf_offset);
calculateScrollbarPos();
if ( getScrollWidth() < getViewportWidth() )
setScrollWidth (getViewportWidth());
}
//----------------------------------------------------------------------
void FScrollView::setHeight (std::size_t h, bool adjust)
{
FWidget::setHeight (h, adjust);
viewport_geometry.setHeight(h - horizontal_border_spacing);
calculateScrollbarPos();
if ( getScrollHeight() < getViewportHeight() )
setScrollHeight (getViewportHeight());
}
//----------------------------------------------------------------------
void FScrollView::setSize (std::size_t w, std::size_t h, bool adjust)
{
FWidget::setSize (w, h, adjust);
viewport_geometry.setSize ( w - vertical_border_spacing - nf_offset
, h - horizontal_border_spacing );
calculateScrollbarPos();
if ( getScrollWidth() < getViewportWidth()
|| getScrollHeight() < getViewportHeight() )
setScrollSize (getViewportWidth(), getViewportHeight());
}
//----------------------------------------------------------------------
void FScrollView::setGeometry ( int x, int y
, std::size_t w, std::size_t h
, bool adjust )
{
// Set the scroll view geometry
FWidget::setGeometry (x, y, w, h, adjust);
scroll_geometry.setPos ( getTermX() + getLeftPadding() - 1
, getTermY() + getTopPadding() - 1 );
viewport_geometry.setSize ( w - vertical_border_spacing - nf_offset
, h - horizontal_border_spacing );
calculateScrollbarPos();
if ( getScrollWidth() < getViewportWidth()
|| getScrollHeight() < getViewportHeight() )
{
setScrollSize (getViewportWidth(), getViewportHeight());
}
else if ( ! adjust && viewport )
{
viewport->offset_left = scroll_geometry.getX();
viewport->offset_top = scroll_geometry.getY();
}
}
//----------------------------------------------------------------------
void FScrollView::setCursorPos (int x, int y)
{
FWidget::setCursorPos (x + getLeftPadding(), y + getTopPadding());
}
//----------------------------------------------------------------------
void FScrollView::setPrintPos (int x, int y)
{
FWidget::setPrintPos (x + getLeftPadding(), y + getTopPadding());
}
//----------------------------------------------------------------------
bool FScrollView::setViewportPrint (bool enable)
{
return (use_own_print_area = ! enable);
}
//----------------------------------------------------------------------
bool FScrollView::setBorder (bool enable)
{
return (border = enable);
}
//----------------------------------------------------------------------
void FScrollView::setHorizontalScrollBarMode (fc::scrollBarMode mode)
{
hMode = mode;
setHorizontalScrollBarVisibility();
}
//----------------------------------------------------------------------
void FScrollView::setVerticalScrollBarMode (fc::scrollBarMode mode)
{
vMode = mode;
setVerticalScrollBarVisibility();
}
//----------------------------------------------------------------------
void FScrollView::clearArea (int fillchar)
{
if ( viewport )
clearArea (viewport, fillchar);
}
//----------------------------------------------------------------------
void FScrollView::scrollToX (int x)
{
scrollTo (x, viewport_geometry.getY() + 1);
}
//----------------------------------------------------------------------
void FScrollView::scrollToY (int y)
{
scrollTo (viewport_geometry.getX() + 1, y);
}
//----------------------------------------------------------------------
void FScrollView::scrollTo (int x, int y)
{
int& xoffset = viewport_geometry.x1_ref();
int& yoffset = viewport_geometry.y1_ref();
int xoffset_before = xoffset;
int yoffset_before = yoffset;
int xoffset_end = int(getScrollWidth() - getViewportWidth());
int yoffset_end = int(getScrollHeight() - getViewportHeight());
std::size_t save_width = viewport_geometry.getWidth();
std::size_t save_height = viewport_geometry.getHeight();
bool changeX = false;
bool changeY = false;
x--;
y--;
if ( xoffset == x && yoffset == y )
return;
xoffset = x;
yoffset = y;
if ( yoffset < 0 )
yoffset = 0;
if ( yoffset > yoffset_end )
yoffset = yoffset_end;
if ( xoffset < 0 )
xoffset = 0;
if ( xoffset > xoffset_end )
xoffset = xoffset_end;
changeX = bool(xoffset_before != xoffset);
changeY = bool(yoffset_before != yoffset);
if ( ! isVisible() || ! viewport || ! (changeX || changeY) )
return;
if ( changeX )
{
viewport_geometry.setWidth(save_width);
setLeftPadding (1 - xoffset);
setRightPadding (1 - (xoffset_end - xoffset) + int(nf_offset));
if ( update_scrollbar )
{
hbar->setValue (xoffset);
drawHBar();
}
}
if ( changeY )
{
viewport_geometry.setHeight(save_height);
setTopPadding (1 - yoffset);
setBottomPadding (1 - (yoffset_end - yoffset));
if ( update_scrollbar )
{
vbar->setValue (yoffset);
drawVBar();
}
}
viewport->has_changes = true;
copy2area();
updateTerminal();
}
//----------------------------------------------------------------------
void FScrollView::scrollBy (int dx, int dy)
{
scrollTo (1 + getScrollX() + dx, 1 + getScrollY() + dy);
}
//----------------------------------------------------------------------
void FScrollView::draw()
{
unsetViewportPrint();
if ( isMonochron() )
setReverse(true);
if ( auto p = getParentWidget() )
setColor (p->getForegroundColor(), p->getBackgroundColor());
else
setColor();
if ( border )
{
if ( isNewFont() )
drawBorder (1, 1, int(getWidth()) - 1, int(getHeight()));
else
drawBorder();
}
if ( isMonochron() )
setReverse(false);
setViewportPrint();
copy2area();
redrawVBar();
redrawHBar();
}
//----------------------------------------------------------------------
void FScrollView::onKeyPress (FKeyEvent* ev)
{
int yoffset_end = int(getScrollHeight() - getViewportHeight());
switch ( ev->key() )
{
case fc::Fkey_up:
scrollBy (0, -1);
ev->accept();
break;
case fc::Fkey_down:
scrollBy (0, 1);
ev->accept();
break;
case fc::Fkey_left:
scrollBy (-1, 0);
ev->accept();
break;
case fc::Fkey_right:
scrollBy (1, 0);
ev->accept();
break;
case fc::Fkey_ppage:
scrollBy (0, int(-getViewportHeight()));
ev->accept();
break;
case fc::Fkey_npage:
scrollBy (0, int(getViewportHeight()));
ev->accept();
break;
case fc::Fkey_home:
scrollToY (1);
ev->accept();
break;
case fc::Fkey_end:
scrollToY (1 + yoffset_end);
ev->accept();
break;
default:
break;
}
}
//----------------------------------------------------------------------
void FScrollView::onWheel (FWheelEvent* ev)
{
int distance = 4;
switch ( ev->getWheel() )
{
case fc::WheelUp:
scrollBy (0, -distance);
break;
case fc::WheelDown:
scrollBy (0, distance);
break;
default:
break;
}
}
//----------------------------------------------------------------------
void FScrollView::onFocusIn (FFocusEvent* in_ev)
{
// Sets the focus to a child widget if it exists
if ( hasChildren() )
{
auto prev_element = getFocusWidget();
if ( in_ev->getFocusType() == fc::FocusNextWidget )
focusFirstChild();
else if ( in_ev->getFocusType() == fc::FocusPreviousWidget )
focusLastChild();
if ( prev_element )
prev_element->redraw();
if ( getFocusWidget() )
getFocusWidget()->redraw();
FFocusEvent cfi (fc::ChildFocusIn_Event);
onChildFocusIn(&cfi);
}
}
//----------------------------------------------------------------------
void FScrollView::onChildFocusIn (FFocusEvent*)
{
// Scrolls the viewport so that the focused widget is visible
FRect widget_geometry;
FRect vp_geometry;
auto focus = FWidget::getFocusWidget();
if ( ! focus )
return;
widget_geometry = focus->getGeometryWithShadow();
vp_geometry = viewport_geometry;
vp_geometry.move(1, 1);
if ( ! vp_geometry.contains(widget_geometry) )
{
int x
, y
, vx = vp_geometry.getX()
, vy = vp_geometry.getY()
, wx = widget_geometry.getX()
, wy = widget_geometry.getY();
if ( wx > vx )
x = widget_geometry.getX2() - int(vp_geometry.getWidth()) + 1;
else
x = wx;
if ( wy > vy )
y = widget_geometry.getY2() - int(vp_geometry.getHeight()) + 1;
else
y = wy;
scrollTo (x, y);
}
}
//----------------------------------------------------------------------
void FScrollView::onChildFocusOut (FFocusEvent* out_ev)
{
// Change the focus away from FScrollView to another widget
auto focus = FWidget::getFocusWidget();
if ( out_ev->getFocusType() == fc::FocusNextWidget )
{
auto last_widget = getLastFocusableWidget(getChildren());
if ( focus == last_widget )
{
out_ev->accept();
focusNextChild();
}
}
else if ( out_ev->getFocusType() == fc::FocusPreviousWidget )
{
auto first_widget = getFirstFocusableWidget(getChildren());
if ( focus == first_widget )
{
out_ev->accept();
focusPrevChild();
}
}
}
// protected methods of FScrollView
//----------------------------------------------------------------------
FVTerm::term_area* FScrollView::getPrintArea()
{
// returns print area or viewport
if ( use_own_print_area || ! viewport )
{
child_print_area = nullptr;
auto area = FWidget::getPrintArea();
child_print_area = viewport;
return area;
}
else
return viewport;
}
//----------------------------------------------------------------------
void FScrollView::adjustSize()
{
FWidget::adjustSize();
std::size_t width = getWidth();
std::size_t height = getHeight();
int xoffset = viewport_geometry.getX();
int yoffset = viewport_geometry.getY();
scroll_geometry.setPos ( getTermX() + getLeftPadding() - 1
, getTermY() + getTopPadding() - 1 );
if ( viewport )
{
viewport->offset_left = scroll_geometry.getX();
viewport->offset_top = scroll_geometry.getY();
}
hbar->setMaximum (int(getScrollWidth() - getViewportWidth()));
hbar->setPageSize (int(getScrollWidth()), int(getViewportWidth()));
hbar->setY (int(height));
hbar->setWidth (width - 2, false);
hbar->setValue (xoffset);
hbar->resize();
setHorizontalScrollBarVisibility();
vbar->setMaximum (int(getScrollHeight() - getViewportHeight()));
vbar->setPageSize (int(getScrollHeight()), int(getViewportHeight()));
vbar->setX (int(width));
vbar->setHeight (height - 2, false);
vbar->setValue (yoffset);
vbar->resize();
setVerticalScrollBarVisibility();
}
//----------------------------------------------------------------------
void FScrollView::copy2area()
{
// copy viewport to area
if ( ! hasPrintArea() )
FWidget::getPrintArea();
if ( ! (hasPrintArea() && viewport) )
return;
if ( ! viewport->has_changes )
return;
int ax = getTermX() - print_area->offset_left
, ay = getTermY() - print_area->offset_top
, dx = viewport_geometry.getX()
, dy = viewport_geometry.getY()
, y_end = int(getViewportHeight())
, x_end = int(getViewportWidth());
// viewport width does not fit into the print_area
if ( print_area->width <= ax + x_end )
x_end = print_area->width - ax;
// viewport height does not fit into the print_area
if ( print_area->height <= ay + y_end )
y_end = print_area->height - ay;
for (int y = 0; y < y_end; y++) // line loop
{
charData* vc; // viewport character
charData* ac; // area character
int v_line_len = viewport->width;
int a_line_len = print_area->width + print_area->right_shadow;
vc = &viewport->text[(dy + y) * v_line_len + dx];
ac = &print_area->text[(ay + y) * a_line_len + ax];
std::memcpy (ac, vc, sizeof(charData) * unsigned(x_end));
if ( int(print_area->changes[ay + y].xmin) > ax )
print_area->changes[ay + y].xmin = uInt(ax);
if ( int(print_area->changes[ay + y].xmax) < ax + x_end - 1 )
print_area->changes[ay + y].xmax = uInt(ax + x_end - 1);
}
setViewportCursor();
viewport->has_changes = false;
print_area->has_changes = true;
}
// private methods of FScrollView
//----------------------------------------------------------------------
inline FPoint FScrollView::getViewportCursorPos()
{
auto window = FWindow::getWindowWidget(this);
if ( window )
{
int widget_offsetX = getTermX() - window->getTermX()
, widget_offsetY = getTermY() - window->getTermY()
, x = widget_offsetX + viewport->input_cursor_x
- viewport_geometry.getX()
, y = widget_offsetY + viewport->input_cursor_y
- viewport_geometry.getY();
return FPoint (x, y);
}
else
return FPoint (-1, -1);
}
//----------------------------------------------------------------------
void FScrollView::init (FWidget* parent)
{
int xoffset_end;
int yoffset_end;
assert ( parent != 0 );
assert ( ! parent->isInstanceOf("FScrollView") );
setForegroundColor (wc.dialog_fg);
setBackgroundColor (wc.dialog_bg);
init_scrollbar();
setGeometry (1, 1, 4, 4);
setMinimumSize (4, 4);
xoffset_end = int(getScrollWidth() - getViewportWidth());
yoffset_end = int(getScrollHeight() - getViewportHeight());
nf_offset = isNewFont() ? 1 : 0;
setTopPadding (1 - getScrollY());
setLeftPadding (1 - getScrollX());
setBottomPadding (1 - (yoffset_end - getScrollY()));
setRightPadding (1 - (xoffset_end - getScrollX()) + nf_offset);
FPoint no_shadow(0, 0);
std::size_t w = getViewportWidth();
std::size_t h = getViewportHeight();
if ( w < 1 )
w = 1;
if ( h < 1 )
h = 1;
scroll_geometry.setRect (0, 0, w, h);
createArea (scroll_geometry, no_shadow, viewport);
addPreprocessingHandler
(
F_PREPROC_HANDLER (this, &FScrollView::copy2area)
);
if ( viewport )
child_print_area = viewport;
}
//----------------------------------------------------------------------
void FScrollView::init_scrollbar()
{
try
{
vbar = std::make_shared<FScrollbar>(fc::vertical, this);
vbar->setMinimum(0);
vbar->setValue(0);
vbar->hide();
hbar = std::make_shared<FScrollbar>(fc::horizontal, this);
hbar->setMinimum(0);
hbar->setValue(0);
hbar->hide();
}
catch (const std::bad_alloc& ex)
{
std::cerr << bad_alloc_str << ex.what() << std::endl;
return;
}
vbar->addCallback
(
"change-value",
F_METHOD_CALLBACK (this, &FScrollView::cb_VBarChange)
);
hbar->addCallback
(
"change-value",
F_METHOD_CALLBACK (this, &FScrollView::cb_HBarChange)
);
}
//----------------------------------------------------------------------
void FScrollView::calculateScrollbarPos()
{
std::size_t width = getWidth();
std::size_t height = getHeight();
if ( isNewFont() )
{
vbar->setGeometry (int(width), 2, 2, height - 2);
hbar->setGeometry (1, int(height), width - 2, 1);
}
else
{
vbar->setGeometry (int(width), 2, 1, height - 2);
hbar->setGeometry (2, int(height), width - 2, 1);
}
vbar->resize();
hbar->resize();
}
//----------------------------------------------------------------------
void FScrollView::setHorizontalScrollBarVisibility()
{
switch ( hMode )
{
case fc::Auto:
if ( getScrollWidth() > getViewportWidth() )
hbar->setVisible();
else
hbar->hide();
break;
case fc::Hidden:
hbar->hide();
break;
case fc::Scroll:
hbar->setVisible();
break;
}
}
//----------------------------------------------------------------------
void FScrollView::setVerticalScrollBarVisibility()
{
switch ( vMode )
{
case fc::Auto:
if ( getScrollHeight() > getViewportHeight() )
vbar->setVisible();
else
vbar->hide();
break;
case fc::Hidden:
vbar->hide();
break;
case fc::Scroll:
vbar->setVisible();
break;
}
}
//----------------------------------------------------------------------
void FScrollView::setViewportCursor()
{
if ( ! isChild(getFocusWidget()) )
return;
FPoint cursor_pos ( viewport->input_cursor_x - 1
, viewport->input_cursor_y - 1 );
FPoint window_cursor_pos = getViewportCursorPos();
print_area->input_cursor_x = window_cursor_pos.getX();
print_area->input_cursor_y = window_cursor_pos.getY();
if ( viewport->input_cursor_visible
&& viewport_geometry.contains(cursor_pos) )
print_area->input_cursor_visible = true;
else
print_area->input_cursor_visible = false;
}
//----------------------------------------------------------------------
void FScrollView::cb_VBarChange (FWidget*, FDataPtr)
{
FScrollbar::sType scrollType = vbar->getScrollType();
int distance = 1;
int wheel_distance = 4;
if ( scrollType >= FScrollbar::scrollStepBackward
&& scrollType <= FScrollbar::scrollWheelDown )
{
update_scrollbar = true;
}
else
{
update_scrollbar = false;
}
switch ( scrollType )
{
case FScrollbar::noScroll:
break;
case FScrollbar::scrollPageBackward:
distance = int(getViewportHeight());
// fall through
case FScrollbar::scrollStepBackward:
scrollBy (0, -distance);
break;
case FScrollbar::scrollPageForward:
distance = int(getViewportHeight());
// fall through
case FScrollbar::scrollStepForward:
scrollBy (0, distance);
break;
case FScrollbar::scrollJump:
scrollToY (1 + int(vbar->getValue()));
break;
case FScrollbar::scrollWheelUp:
scrollBy (0, -wheel_distance);
break;
case FScrollbar::scrollWheelDown:
scrollBy (0, wheel_distance);
break;
}
update_scrollbar = true;
}
//----------------------------------------------------------------------
void FScrollView::cb_HBarChange (FWidget*, FDataPtr)
{
FScrollbar::sType scrollType = hbar->getScrollType();
int distance = 1;
int wheel_distance = 4;
if ( scrollType >= FScrollbar::scrollStepBackward
&& scrollType <= FScrollbar::scrollWheelDown )
{
update_scrollbar = true;
}
else
{
update_scrollbar = false;
}
switch ( scrollType )
{
case FScrollbar::noScroll:
break;
case FScrollbar::scrollPageBackward:
distance = int(getViewportWidth());
// fall through
case FScrollbar::scrollStepBackward:
scrollBy (-distance, 0);
break;
case FScrollbar::scrollPageForward:
distance = int(getViewportWidth());
// fall through
case FScrollbar::scrollStepForward:
scrollBy (distance, 0);
break;
case FScrollbar::scrollJump:
scrollToX (1 + int(hbar->getValue()));
break;
case FScrollbar::scrollWheelUp:
scrollBy (-wheel_distance, 0);
break;
case FScrollbar::scrollWheelDown:
scrollBy (wheel_distance, 0);
break;
}
update_scrollbar = true;
}
//----------------------------------------------------------------------
inline void FScrollView::redrawHBar()
{
child_print_area = nullptr;
if ( hbar->isVisible() )
hbar->redraw();
child_print_area = viewport;
}
//----------------------------------------------------------------------
inline void FScrollView::redrawVBar()
{
child_print_area = nullptr;
if ( vbar->isVisible() )
vbar->redraw();
child_print_area = viewport;
}
//----------------------------------------------------------------------
inline void FScrollView::drawHBar()
{
child_print_area = nullptr;
if ( hbar->isVisible() )
hbar->drawBar();
child_print_area = viewport;
}
//----------------------------------------------------------------------
inline void FScrollView::drawVBar()
{
child_print_area = nullptr;
if ( vbar->isVisible() )
vbar->drawBar();
child_print_area = viewport;
}
} // namespace finalcut