#include <lib/gui/elistbox.h>
#include <lib/gui/elistboxcontent.h>
+#include <lib/gui/eslider.h>
+#include <lib/actions/action.h>
-eListbox::eListbox(eWidget *parent): eWidget(parent)
+eListbox::eListbox(eWidget *parent)
+ :eWidget(parent), m_scrollbar_mode(showNever), m_prev_scrollbar_page(-1)
+ ,m_content_changed(false), m_top(0), m_selected(0), m_itemheight(25)
+ ,m_items_per_page(0), m_selection_enabled(1), m_scrollbar(NULL)
{
setContent(new eListboxStringContent());
+
+ ePtr<eActionMap> ptr;
+ eActionMap::getInstance(ptr);
+ ptr->bindAction("ListboxActions", 0, 0, this);
+}
+
+eListbox::~eListbox()
+{
+ if (m_scrollbar)
+ delete m_scrollbar;
+
+ ePtr<eActionMap> ptr;
+ eActionMap::getInstance(ptr);
+ ptr->unbindAction(this, 0);
+}
+
+void eListbox::setScrollbarMode(int mode)
+{
+ m_scrollbar_mode = mode;
+ if ( m_scrollbar )
+ {
+ if ( m_scrollbar_mode == showNever )
+ {
+ delete m_scrollbar;
+ m_scrollbar=0;
+ }
+ }
+ else
+ {
+ m_scrollbar = new eSlider(this);
+ m_scrollbar->hide();
+ m_scrollbar->setBorderWidth(1);
+ m_scrollbar->setOrientation(eSlider::orVertical);
+ m_scrollbar->setRange(0,100);
+ }
}
void eListbox::setContent(iListboxContent *content)
{
m_content = content;
- invalidate();
- m_content->cursorHome();
- m_top = 0;
- m_selected = 0;
+ if (content)
+ m_content->setListbox(this);
+ entryReset();
}
void eListbox::moveSelection(int dir)
{
+ /* refuse to do anything without a valid list. */
+ if (!m_content)
+ return;
+
+ /* if our list does not have one entry, don't do anything. */
+ if (!m_items_per_page)
+ return;
+
/* we need the old top/sel to see what we have to redraw */
int oldtop = m_top;
int oldsel = m_selected;
if (!m_content->cursorValid())
m_content->cursorMove(-1);
break;
+ case pageUp:
+ if (m_content->cursorGet() >= m_items_per_page)
+ {
+ m_content->cursorMove(-m_items_per_page);
+ m_top -= m_items_per_page;
+ if (m_top < 0)
+ m_top = 0;
+ } else
+ {
+ m_top = 0;
+ m_content->cursorHome();
+ }
+ break;
case moveTop:
m_content->cursorHome();
m_top = 0; /* align with top, speeds up process */
break;
+
+ case pageDown:
+ m_content->cursorMove(m_items_per_page);
+ if (m_content->cursorValid())
+ break;
+ /* fall through */
case moveEnd:
/* move to last existing one ("end" is already invalid) */
m_content->cursorEnd(); m_content->cursorMove(-1);
-
- m_top = m_content->cursorGet() - m_items_per_page + 1;
- if (m_top < 0)
- m_top = 0;
+ /* current selection invisible? */
+ if (m_top + m_items_per_page <= m_content->cursorGet())
+ {
+ int rest = m_content->size() % m_items_per_page;
+ if ( rest )
+ m_top = m_content->cursorGet() - rest + 1;
+ else
+ m_top = m_content->cursorGet() - m_items_per_page + 1;
+ if (m_top < 0)
+ m_top = 0;
+ }
+ break;
+ case justCheck:
break;
}
/* now, look wether the current selection is out of screen */
m_selected = m_content->cursorGet();
- if (m_selected < m_top)
+
+ while (m_selected < m_top)
{
m_top -= m_items_per_page;
if (m_top < 0)
m_top = 0;
- } else if (m_selected >= m_top + m_items_per_page)
- {
- /* m_top should be always valid here as it's selected */
- m_top += m_items_per_page;
}
-
+ while (m_selected >= m_top + m_items_per_page)
+ /* m_top should be always valid here as it's selected */
+ m_top += m_items_per_page;
+
+ updateScrollBar();
+
if (m_top != oldtop)
invalidate();
- else
+ else if (m_selected != oldsel)
{
+
/* redraw the old and newly selected */
gRegion inv = eRect(0, m_itemheight * (m_selected-m_top), size().width(), m_itemheight);
inv |= eRect(0, m_itemheight * (oldsel-m_top), size().width(), m_itemheight);
}
}
+void eListbox::moveSelectionTo(int index)
+{
+ if ( m_content )
+ {
+ m_content->cursorHome();
+ m_content->cursorMove(index);
+ moveSelection(justCheck);
+ }
+}
+
+int eListbox::getCurrentIndex()
+{
+ if ( m_content && m_content->cursorValid() )
+ return m_content->cursorGet();
+ return 0;
+}
+
+void eListbox::updateScrollBar()
+{
+ if (!m_content || m_scrollbar_mode == showNever )
+ return;
+ int entries = m_content->size();
+ if ( m_content_changed )
+ {
+ int width = size().width();
+ int height = size().height();
+ m_content_changed = false;
+ if ( entries > m_items_per_page || m_scrollbar_mode == showAlways )
+ {
+ int sbarwidth=width/16;
+ if ( sbarwidth < 18 )
+ sbarwidth=18;
+ if ( sbarwidth > 22 )
+ sbarwidth=22;
+ m_scrollbar->move(ePoint(width-sbarwidth, 0));
+ m_scrollbar->resize(eSize(sbarwidth, height));
+ m_content->setSize(eSize(width-sbarwidth-5, m_itemheight));
+ m_scrollbar->show();
+ }
+ else
+ {
+ m_content->setSize(eSize(width, m_itemheight));
+ m_scrollbar->hide();
+ }
+ }
+ if ( m_items_per_page && entries )
+ {
+ int curVisiblePage = m_top / m_items_per_page;
+ if (m_prev_scrollbar_page != curVisiblePage)
+ {
+ m_prev_scrollbar_page = curVisiblePage;
+ int pages = entries / m_items_per_page;
+ if ( (pages*m_items_per_page) < entries )
+ ++pages;
+ int start=(m_top*100)/(pages*m_items_per_page);
+ int vis=(m_items_per_page*100)/(pages*m_items_per_page);
+ if (vis < 3)
+ vis=3;
+ m_scrollbar->setStartEnd(start,start+vis);
+ }
+ }
+}
+
int eListbox::event(int event, void *data, void *data2)
{
switch (event)
{
ePtr<eWindowStyle> style;
+ if (!m_content)
+ return eWidget::event(event, data, data2);
assert(m_content);
- recalcSize(); // move to event
getStyle(style);
m_content->cursorSave();
m_content->cursorMove(m_top - m_selected);
- for (int y = 0, i = 0; i < m_items_per_page; y += m_itemheight, ++i)
+ for (int y = 0, i = 0; i <= m_items_per_page; y += m_itemheight, ++i)
{
- m_content->paint(painter, *style, ePoint(0, y), m_selected == m_content->cursorGet());
+ m_content->paint(painter, *style, ePoint(0, y), m_selected == m_content->cursorGet() && m_content->size() && m_selection_enabled);
m_content->cursorMove(+1);
}
-
+
+ if ( m_scrollbar && m_scrollbar->isVisible() )
+ {
+ painter.clip(eRect(m_scrollbar->position() - ePoint(5,0), eSize(5,m_scrollbar->size().height())));
+ painter.clear();
+ painter.clippop();
+ }
+
m_content->cursorRestore();
-
+
return 0;
}
+ case evtChangedSize:
+ recalcSize();
+ return eWidget::event(event, data, data2);
+
+ case evtAction:
+ if (isVisible())
+ {
+ moveSelection((int)data2);
+ return 1;
+ }
+ return 0;
default:
return eWidget::event(event, data, data2);
}
void eListbox::recalcSize()
{
- m_itemheight = 20;
+ m_content_changed=true;
+ m_prev_scrollbar_page=-1;
m_content->setSize(eSize(size().width(), m_itemheight));
m_items_per_page = size().height() / m_itemheight;
+
+ if (m_items_per_page < 0) /* TODO: whyever - our size could be invalid, or itemheigh could be wrongly specified. */
+ m_items_per_page = 0;
+
+ moveSelection(justCheck);
+}
+
+void eListbox::setItemHeight(int h)
+{
+ if (h)
+ m_itemheight = h;
+ else
+ m_itemheight = 20;
+ recalcSize();
+}
+
+void eListbox::setSelectionEnable(int en)
+{
+ if (m_selection_enabled == en)
+ return;
+ m_selection_enabled = en;
+ entryChanged(m_selected); /* redraw current entry */
+}
+
+void eListbox::entryAdded(int index)
+{
+ /* manage our local pointers. when the entry was added before the current position, we have to advance. */
+
+ /* we need to check <= - when the new entry has the (old) index of the cursor, the cursor was just moved down. */
+ if (index <= m_selected)
+ ++m_selected;
+ if (index <= m_top)
+ ++m_top;
+
+ /* we have to check wether our current cursor is gone out of the screen. */
+ /* moveSelection will check for this case */
+ moveSelection(justCheck);
+
+ /* now, check if the new index is visible. */
+ if ((m_top <= index) && (index < (m_top + m_items_per_page)))
+ {
+ /* todo, calc exact invalidation... */
+ invalidate();
+ }
+}
+
+void eListbox::entryRemoved(int index)
+{
+ if (index == m_selected)
+ m_selected = m_content->cursorGet();
+
+ moveSelection(justCheck);
+
+ if ((m_top <= index) && (index < (m_top + m_items_per_page)))
+ {
+ /* todo, calc exact invalidation... */
+ invalidate();
+ }
+}
+
+void eListbox::entryChanged(int index)
+{
+ if ((m_top <= index) && (index < (m_top + m_items_per_page)))
+ {
+ gRegion inv = eRect(0, m_itemheight * (index-m_top), size().width(), m_itemheight);
+ invalidate(inv);
+ }
+}
+
+void eListbox::entryReset(bool cursorHome)
+{
+ m_content_changed=true;
+ m_prev_scrollbar_page=-1;
+ if ( cursorHome )
+ {
+ if (m_content)
+ m_content->cursorHome();
+ m_top = 0;
+ m_selected = 0;
+ }
+ moveSelection(justCheck);
+ invalidate();
}
git.cweiske.de / enigma2.git / blobdiff