628 lines
14 KiB
C++
628 lines
14 KiB
C++
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// File: fscrollview.cpp
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// Provides: class FScrollView
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#include "fscrollview.h"
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//----------------------------------------------------------------------
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// class FScrollView
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//----------------------------------------------------------------------
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// constructors and destructor
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//----------------------------------------------------------------------
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FScrollView::FScrollView (FWidget* parent)
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: FWidget(parent)
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, scroll_size(1,1,1,1)
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, scroll_offset()
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, viewport(0)
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, vbar(0)
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, hbar(0)
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, nf_offset(0)
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, own_print_area(false)
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{
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init();
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}
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//----------------------------------------------------------------------
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FScrollView::~FScrollView() // destructor
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{
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delete vbar;
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delete hbar;
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removeArea (viewport);
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}
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// public methods of FScrollView
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//----------------------------------------------------------------------
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void FScrollView::setScrollWidth (int width)
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{
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if ( width < getClientWidth() )
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width = getClientWidth();
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if ( scroll_size.getWidth() == width )
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return;
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if ( viewport )
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{
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FPoint no_shadow(0,0);
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scroll_size.setWidth (width);
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resizeArea (scroll_size, no_shadow, viewport);
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}
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hbar->setMaximum (width - getClientWidth());
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hbar->setPageSize (width, getClientWidth());
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hbar->calculateSliderValues();
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if ( ! hbar->isVisible() )
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hbar->setVisible();
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}
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//----------------------------------------------------------------------
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void FScrollView::setScrollHeight (int height)
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{
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if ( height < getClientHeight() )
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height = getClientHeight();
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if ( scroll_size.getHeight() == height )
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return;
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if ( viewport )
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{
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FPoint no_shadow(0,0);
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scroll_size.setHeight (height);
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resizeArea (scroll_size, no_shadow, viewport);
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}
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vbar->setMaximum (height - getClientHeight());
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vbar->setPageSize (height, getClientHeight());
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vbar->calculateSliderValues();
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if ( ! vbar->isVisible() )
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vbar->setVisible();
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}
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//----------------------------------------------------------------------
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void FScrollView::setScrollSize (int width, int height)
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{
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if ( width < getClientWidth() )
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width = getClientWidth();
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if ( height < getClientHeight() )
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height = getClientHeight();
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if ( scroll_size.getWidth() == width
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&& scroll_size.getHeight() == height )
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return;
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if ( viewport )
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{
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FPoint no_shadow(0,0);
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scroll_size.setSize (width, height);
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resizeArea (scroll_size, no_shadow, viewport);
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}
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hbar->setMaximum (width - getClientWidth());
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hbar->setPageSize (width, getClientWidth());
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hbar->calculateSliderValues();
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if ( ! hbar->isVisible() )
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hbar->setVisible();
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vbar->setMaximum (height - getClientHeight());
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vbar->setPageSize (height, getClientHeight());
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vbar->calculateSliderValues();
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if ( ! vbar->isVisible() )
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vbar->setVisible();
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}
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//----------------------------------------------------------------------
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void FScrollView::setX (int x, bool adjust)
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{
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FWidget::setX (x, adjust);
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scroll_size.setX (getTermX() - 1);
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}
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//----------------------------------------------------------------------
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void FScrollView::setY (int y, bool adjust)
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{
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FWidget::setY (y, adjust);
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scroll_size.setY (getTermY() - 1);
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}
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//----------------------------------------------------------------------
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void FScrollView::setPos (int x, int y, bool adjust)
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{
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FWidget::setPos (x, y, adjust);
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scroll_size.setPos (getTermX() - 1, getTermY() - 1);
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}
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//----------------------------------------------------------------------
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void FScrollView::setWidth (int w, bool adjust)
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{
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FWidget::setWidth (w, adjust);
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calculateScrollbarPos();
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if ( scroll_size.getWidth() < getClientWidth() )
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setScrollWidth (getClientWidth());
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}
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//----------------------------------------------------------------------
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void FScrollView::setHeight (int h, bool adjust)
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{
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FWidget::setHeight (h, adjust);
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calculateScrollbarPos();
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if ( scroll_size.getHeight() < getClientHeight() )
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setScrollHeight (getClientHeight());
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}
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//----------------------------------------------------------------------
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void FScrollView::setSize (int w, int h, bool adjust)
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{
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FWidget::setSize (w, h, adjust);
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calculateScrollbarPos();
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if ( scroll_size.getWidth() < getClientWidth()
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|| scroll_size.getHeight() < getClientHeight() )
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setScrollSize (getClientWidth(), getClientHeight());
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}
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//----------------------------------------------------------------------
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void FScrollView::setGeometry (int x, int y, int w, int h, bool adjust)
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{
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FWidget::setGeometry (x, y, w, h, adjust);
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scroll_size.setPos (getTermX() - 1, getTermY() - 1);
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calculateScrollbarPos();
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if ( scroll_size.getWidth() < getClientWidth()
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|| scroll_size.getHeight() < getClientHeight() )
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setScrollSize (getClientWidth(), getClientHeight());
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}
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//----------------------------------------------------------------------
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void FScrollView::clearArea (int fillchar)
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{
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if ( viewport )
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clearArea (viewport, fillchar);
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}
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//----------------------------------------------------------------------
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void FScrollView::draw()
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{
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own_print_area = true;
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if ( FWidget* p = getParentWidget() )
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setColor (p->getForegroundColor(), p->getBackgroundColor());
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else
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setColor (wc.dialog_fg, wc.dialog_bg);
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if ( isNewFont() )
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drawBorder (1, 1, getWidth() - 1, getHeight());
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else
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drawBorder();
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own_print_area = false;
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copy2area();
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if ( vbar->isVisible() )
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vbar->redraw();
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if ( hbar->isVisible() )
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hbar->redraw();
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}
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//----------------------------------------------------------------------
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void FScrollView::onWheel (FWheelEvent* ev)
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{
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int yoffset = scroll_offset.getY();
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int yoffset_before = yoffset;
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int wheel = ev->getWheel();
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switch ( wheel )
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{
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case fc::WheelUp:
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if ( yoffset == 0 )
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break;
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yoffset -= 4;
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if ( yoffset < 0 )
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yoffset=0;
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break;
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case fc::WheelDown:
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{
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int yoffset_end = scroll_size.getHeight() - getClientHeight();
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if ( yoffset_end < 0 )
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yoffset_end = 0;
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if ( yoffset == yoffset_end )
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break;
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yoffset += 4;
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if ( yoffset > yoffset_end )
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yoffset = yoffset_end;
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}
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break;
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default:
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break;
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}
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scroll_offset.setY (yoffset);
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if ( isVisible() )
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{
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if ( viewport && yoffset_before != yoffset )
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viewport->has_changes = true;
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copy2area();
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}
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vbar->setValue (yoffset);
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if ( vbar->isVisible() && yoffset_before != yoffset )
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vbar->drawBar();
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updateTerminal();
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}
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// protected methods of FScrollView
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//----------------------------------------------------------------------
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FVTerm::term_area* FScrollView::getPrintArea()
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{
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// returns the viewport print area
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if ( viewport && ! own_print_area )
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return viewport;
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else
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return FVTerm::getPrintArea();
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}
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//----------------------------------------------------------------------
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void FScrollView::adjustSize()
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{
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FWidget::adjustSize();
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int width = getWidth();
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int height = getHeight();
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int xoffset = scroll_offset.getX();
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int yoffset = scroll_offset.getY();
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hbar->setMaximum (scroll_size.getWidth() - getClientWidth());
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hbar->setPageSize (scroll_size.getWidth(), getClientWidth());
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hbar->setY (height);
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hbar->setWidth (width - 2, false);
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hbar->setValue (xoffset);
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hbar->resize();
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vbar->setMaximum (scroll_size.getHeight() - getClientHeight());
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vbar->setPageSize (scroll_size.getHeight(), getClientHeight());
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vbar->setX (width);
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vbar->setHeight (height - 2, false);
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vbar->setValue (yoffset);
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vbar->resize();
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}
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//----------------------------------------------------------------------
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void FScrollView::copy2area()
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{
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// copy viewport to area
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int ax, ay, dx, dy, y_end, x_end;
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char_data* vc; // viewport character
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char_data* ac; // area character
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if ( ! print_area )
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FVTerm::getPrintArea();
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if ( ! (print_area && viewport) )
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return;
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if ( ! viewport->has_changes )
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return;
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ax = getTermX() - print_area->x_offset;
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ay = getTermY() - print_area->y_offset;
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dx = scroll_offset.getX();
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dy = scroll_offset.getY();
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y_end = getClientHeight();
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x_end = getClientWidth();
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for (int y=0; y < y_end; y++) // line loop
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{
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int v_line_len = viewport->width;
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int a_line_len = print_area->width + print_area->right_shadow;
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vc = &viewport->text[(dy+y) * v_line_len + dx];
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ac = &print_area->text[(ay+y) * a_line_len + ax];
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std::memcpy (ac, vc, sizeof(char_data) * unsigned(x_end));
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if ( short(print_area->changes[ay+y].xmin) > ax )
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print_area->changes[ay+y].xmin = uInt(ax);
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if ( short(print_area->changes[ay+y].xmax) < ax+x_end-1 )
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print_area->changes[ay+y].xmax = uInt(ax+x_end-1);
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}
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viewport->has_changes = false;
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print_area->has_changes = true;
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}
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// private methods of FScrollView
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//----------------------------------------------------------------------
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void FScrollView::init()
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{
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vbar = new FScrollbar(fc::vertical, this);
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vbar->setMinimum(0);
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vbar->setValue(0);
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vbar->hide();
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hbar = new FScrollbar(fc::horizontal, this);
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hbar->setMinimum(0);
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hbar->setValue(0);
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hbar->hide();
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vbar->addCallback
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(
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"change-value",
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_METHOD_CALLBACK (this, &FScrollView::cb_VBarChange)
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);
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hbar->addCallback
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(
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"change-value",
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_METHOD_CALLBACK (this, &FScrollView::cb_HBarChange)
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);
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nf_offset = isNewFont() ? 1 : 0;
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setTopPadding(1);
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setLeftPadding(1);
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setBottomPadding(1);
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setRightPadding(1 + nf_offset);
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FPoint no_shadow(0,0);
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scroll_size.setRect (0, 0, getClientWidth(), getClientHeight());
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createArea (scroll_size, no_shadow, viewport);
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}
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//----------------------------------------------------------------------
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void FScrollView::calculateScrollbarPos()
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{
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int width = getWidth();
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int height = getHeight();
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if ( isNewFont() )
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{
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vbar->setGeometry (width, 2, 2, height-2);
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hbar->setGeometry (1, height, width-2, 1);
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}
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else
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{
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vbar->setGeometry (width, 2, 1, height-2);
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hbar->setGeometry (2, height, width-2, 1);
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}
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setRightPadding (1 + nf_offset);
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vbar->resize();
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hbar->resize();
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}
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//----------------------------------------------------------------------
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void FScrollView::cb_VBarChange (FWidget*, void*)
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{
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FScrollbar::sType scrollType;
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bool hasChanges = false;
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int distance = 1;
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int yoffset = scroll_offset.getY();
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int yoffset_before = yoffset;
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int yoffset_end = scroll_size.getHeight() - getClientHeight();
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scrollType = vbar->getScrollType();
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switch ( scrollType )
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{
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case FScrollbar::noScroll:
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break;
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case FScrollbar::scrollPageBackward:
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distance = getClientHeight();
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// fall through
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case FScrollbar::scrollStepBackward:
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yoffset -= distance;
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if ( yoffset < 0 )
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yoffset = 0;
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break;
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case FScrollbar::scrollPageForward:
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distance = getClientHeight();
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// fall through
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case FScrollbar::scrollStepForward:
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yoffset += distance;
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if ( yoffset > yoffset_end )
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yoffset = yoffset_end;
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break;
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case FScrollbar::scrollJump:
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{
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int val = vbar->getValue();
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if ( yoffset == val )
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break;
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yoffset = val;
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if ( yoffset > yoffset_end )
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yoffset = yoffset_end;
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if ( yoffset < 0 )
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yoffset = 0;
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break;
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}
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case FScrollbar::scrollWheelUp:
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if ( yoffset == 0 )
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break;
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yoffset -= 4;
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if ( yoffset < 0 )
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yoffset=0;
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break;
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case FScrollbar::scrollWheelDown:
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if ( yoffset_end < 0 )
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yoffset_end = 0;
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if ( yoffset == yoffset_end )
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break;
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yoffset += 4;
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if ( yoffset > yoffset_end )
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yoffset = yoffset_end;
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break;
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}
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scroll_offset.setY (yoffset);
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if ( isVisible() )
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{
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if ( viewport && yoffset_before != yoffset )
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||
|
viewport->has_changes = true;
|
||
|
|
||
|
copy2area();
|
||
|
hasChanges = true;
|
||
|
}
|
||
|
|
||
|
if ( scrollType >= FScrollbar::scrollStepBackward
|
||
|
&& scrollType <= FScrollbar::scrollWheelDown )
|
||
|
{
|
||
|
vbar->setValue (yoffset);
|
||
|
hasChanges = true;
|
||
|
|
||
|
if ( vbar->isVisible() && yoffset_before != yoffset )
|
||
|
vbar->drawBar();
|
||
|
}
|
||
|
|
||
|
if ( hasChanges )
|
||
|
updateTerminal();
|
||
|
}
|
||
|
|
||
|
//----------------------------------------------------------------------
|
||
|
void FScrollView::cb_HBarChange (FWidget*, void*)
|
||
|
{
|
||
|
FScrollbar::sType scrollType;
|
||
|
bool hasChanges = false;
|
||
|
int distance = 1;
|
||
|
int xoffset = scroll_offset.getX();
|
||
|
int xoffset_before = xoffset;
|
||
|
int xoffset_end = scroll_size.getWidth() - getClientWidth();
|
||
|
scrollType = hbar->getScrollType();
|
||
|
|
||
|
switch ( scrollType )
|
||
|
{
|
||
|
case FScrollbar::noScroll:
|
||
|
break;
|
||
|
|
||
|
case FScrollbar::scrollPageBackward:
|
||
|
distance = getClientWidth();
|
||
|
// fall through
|
||
|
case FScrollbar::scrollStepBackward:
|
||
|
xoffset -= distance;
|
||
|
|
||
|
if ( xoffset < 0 )
|
||
|
xoffset = 0;
|
||
|
|
||
|
break;
|
||
|
|
||
|
case FScrollbar::scrollPageForward:
|
||
|
distance = getClientWidth();
|
||
|
// fall through
|
||
|
case FScrollbar::scrollStepForward:
|
||
|
xoffset += distance;
|
||
|
|
||
|
if ( xoffset > xoffset_end )
|
||
|
xoffset = xoffset_end;
|
||
|
|
||
|
if ( xoffset < 0 )
|
||
|
xoffset = 0;
|
||
|
|
||
|
break;
|
||
|
|
||
|
case FScrollbar::scrollJump:
|
||
|
{
|
||
|
int val = hbar->getValue();
|
||
|
|
||
|
if ( xoffset == val )
|
||
|
break;
|
||
|
|
||
|
xoffset = val;
|
||
|
|
||
|
if ( xoffset > xoffset_end )
|
||
|
xoffset = xoffset_end;
|
||
|
|
||
|
if ( xoffset < 0 )
|
||
|
xoffset = 0;
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
case FScrollbar::scrollWheelUp:
|
||
|
if ( xoffset == 0 )
|
||
|
break;
|
||
|
|
||
|
xoffset -= 4;
|
||
|
|
||
|
if ( xoffset < 0 )
|
||
|
xoffset=0;
|
||
|
|
||
|
break;
|
||
|
|
||
|
case FScrollbar::scrollWheelDown:
|
||
|
if ( xoffset == xoffset_end )
|
||
|
break;
|
||
|
|
||
|
xoffset += 4;
|
||
|
|
||
|
if ( xoffset > xoffset_end )
|
||
|
xoffset = xoffset_end;
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
scroll_offset.setX (xoffset);
|
||
|
|
||
|
if ( isVisible() )
|
||
|
{
|
||
|
if ( viewport && xoffset_before != xoffset )
|
||
|
viewport->has_changes = true;
|
||
|
|
||
|
copy2area();
|
||
|
hasChanges = true;
|
||
|
}
|
||
|
|
||
|
if ( scrollType >= FScrollbar::scrollStepBackward
|
||
|
&& scrollType <= FScrollbar::scrollWheelDown )
|
||
|
{
|
||
|
hbar->setValue (xoffset);
|
||
|
hasChanges = true;
|
||
|
|
||
|
if ( hbar->isVisible() && xoffset_before != xoffset )
|
||
|
hbar->drawBar();
|
||
|
}
|
||
|
|
||
|
if ( hasChanges )
|
||
|
updateTerminal();
|
||
|
}
|