- /* written by: Felix Domke <tmbinc@elitedvb.net> */
#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_enabled_wrap_around(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());
+// 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::setWrapAround(bool state)
+{
+ m_enabled_wrap_around = state;
}
void eListbox::setContent(iListboxContent *content)
{
+ int oldsel = m_selected;
m_content = content;
+ if (content)
+ m_content->setListbox(this);
entryReset();
+ if (oldsel == m_selected)
+ /* emit */ selectionChanged();
+}
+
+bool eListbox::atBegin()
+{
+ if (m_content && !m_selected)
+ return true;
+ return false;
+}
+
+bool eListbox::atEnd()
+{
+ if (m_content && m_content->size() == m_selected+1)
+ return true;
+ return false;
+}
+
+void eListbox::moveToEnd()
+{
+ if (!m_content)
+ return;
+ /* move to last existing one ("end" is already invalid) */
+ m_content->cursorEnd(); m_content->cursorMove(-1);
+ /* 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;
+ }
}
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;
-
/* first, move cursor */
switch (dir)
{
case moveUp:
+ {
m_content->cursorMove(-1);
+ if (m_enabled_wrap_around && oldsel == m_content->cursorGet()) // must wrap around ?
+ moveToEnd();
break;
+ }
case moveDown:
m_content->cursorMove(1);
- /* ok - we could have reached the end. we just go one back then. */
+ /* ok - we could have reached the end. So we do wrap around. */
if (!m_content->cursorValid())
- m_content->cursorMove(-1);
+ {
+ if (m_enabled_wrap_around)
+ {
+ m_top = 0;
+ m_content->cursorHome();
+ }
+ else
+ 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;
+ moveToEnd();
break;
case justCheck:
break;
}
+ if (m_content->cursorValid() && !m_content->currentCursorSelectable())
+ {
+ /* ok, our cursor position is valid (i.e. in list), but not selectable. */
+
+ /* when moving up, continue until we found a valid position. */
+ if ((dir == moveUp) || (dir == pageDown))
+ {
+ while (m_content->cursorGet())
+ {
+ m_content->cursorMove(-1);
+ if (m_content->currentCursorSelectable())
+ {
+ break;
+ }
+ }
+ } else
+ {
+ /* else move down */
+ while (m_content->cursorValid())
+ {
+ m_content->cursorMove(+1);
+ if (m_content->currentCursorSelectable())
+ {
+ break;
+ }
+ }
+
+ if (!m_content->cursorValid())
+ m_content->cursorMove(-1);
+ }
+
+ if (!m_content->currentCursorSelectable())
+ m_content->cursorSet(oldsel);
+ }
+
/* note that we could be on an invalid cursor position, but we don't
care. this only happens on empty lists, and should have almost no
side effects. */
/* 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;
+
+ if (oldsel != m_selected)
+ /* emit */ selectionChanged();
+
+ updateScrollBar();
if (m_top != oldtop)
invalidate();
else if (m_selected != oldsel)
{
-
- /* redraw the old and newly selected */
+ /* 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)
+ gRegion entryrect = eRect(0, 0, size().width(), m_itemheight);
+ const gRegion &paint_region = *(gRegion*)data;
+
+ 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());
+ gRegion entry_clip_rect = paint_region & entryrect;
+
+ if (!entry_clip_rect.empty())
+ m_content->paint(painter, *style, ePoint(0, y), m_selected == m_content->cursorGet() && m_content->size() && m_selection_enabled);
+
+ /* (we could clip with entry_clip_rect, but
+ this shouldn't change the behaviour of any
+ well behaving content, so it would just
+ degrade performance without any gain.) */
+
m_content->cursorMove(+1);
+ entryrect.moveBy(ePoint(0, m_itemheight));
}
-
+
+ // clear/repaint empty/unused space between scrollbar and listboxentrys
+ if (m_scrollbar && m_scrollbar->isVisible())
+ {
+ style->setStyle(painter, eWindowStyle::styleListboxNormal);
+ 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->setSize(eSize(size().width(), m_itemheight));
+ m_content_changed=true;
+ m_prev_scrollbar_page=-1;
+ if (m_content)
+ 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)
void eListbox::entryRemoved(int index)
{
- if (index == m_selected)
+ if (index == m_selected && m_content)
m_selected = m_content->cursorGet();
moveSelection(justCheck);
-
+
if ((m_top <= index) && (index < (m_top + m_items_per_page)))
{
/* todo, calc exact invalidation... */
}
}
-void eListbox::entryReset()
+void eListbox::entryReset(bool selectionHome)
{
+ m_content_changed = true;
+ m_prev_scrollbar_page = -1;
+
+ if (selectionHome)
+ {
+ if (m_content)
+ m_content->cursorHome();
+ m_top = 0;
+ m_selected = 0;
+ }
+
+ if (m_content && (m_selected >= m_content->size()))
+ {
+ if (m_content->size())
+ m_selected = m_content->size() - 1;
+ else
+ m_selected = 0;
+ m_content->cursorSet(m_selected);
+ selectionChanged();
+ }
+
+ moveSelection(justCheck);
invalidate();
- if (m_content)
- m_content->cursorHome();
- m_top = 0;
- m_selected = 0;
}
git.cweiske.de / enigma2.git / blobdiff