#include <lib/gui/elistbox.h>
+#include <lib/gui/elistboxcontent.h>
+#include <lib/gui/eslider.h>
+#include <lib/actions/action.h>
-/*
- The basic idea is to have an interface which gives all relevant list
- processing functions, and can be used by the listbox to browse trough
- the list.
-
- The listbox directly uses the implemented cursor. It tries hard to avoid
- iterating trough the (possibly very large) list, so it should be O(1),
- i.e. the performance should not be influenced by the size of the list.
-
- The list interface knows how to draw the current entry to a specified
- offset. Different interfaces can be used to adapt different lists,
- pre-filter lists on the fly etc.
-
- cursorSave/Restore is used to avoid re-iterating the list on redraw.
- The current selection is always selected as cursor position, the
- cursor is then positioned to the start, and then iterated. This gives
- at most 2x m_items_per_page cursor movements per redraw, indepenent
- of the size of the list.
-
- Although cursorSet is provided, it should be only used when there is no
- other way, as it involves iterating trough the list.
- */
-
-class eListboxTestContent: public virtual iListboxContent
-{
- DECLARE_REF;
-public:
- void cursorHome();
- void cursorEnd();
- int cursorMove(int count=1);
- int cursorValid();
- int cursorSet(int n);
- int cursorGet();
-
- void cursorSave();
- void cursorRestore();
- int size();
-
- RESULT connectItemChanged(const Slot0<void> &itemChanged, ePtr<eConnection> &connection);
-
- // void setOutputDevice ? (for allocating colors, ...) .. requires some work, though
- void setSize(const eSize &size);
-
- /* the following functions always refer to the selected item */
- void paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected);
-private:
- int m_cursor, m_saved_cursor;
- eSize m_size;
-};
-
-DEFINE_REF(eListboxTestContent);
-
-void eListboxTestContent::cursorHome()
-{
- m_cursor = 0;
-}
-
-void eListboxTestContent::cursorEnd()
-{
- m_cursor = size();
-}
-
-int eListboxTestContent::cursorMove(int count)
-{
- m_cursor += count;
-
- if (m_cursor < 0)
- cursorHome();
- else if (m_cursor > size())
- cursorEnd();
- return 0;
-}
-
-int eListboxTestContent::cursorValid()
+eListbox::eListbox(eWidget *parent)
+ :eWidget(parent), m_prev_scrollbar_page(-1), m_content_changed(false)
+ , m_scrollbar_mode(showNever), m_scrollbar(NULL)
{
- return m_cursor < size();
-}
+ setContent(new eListboxStringContent());
-int eListboxTestContent::cursorSet(int n)
-{
- m_cursor = n;
+ ePtr<eActionMap> ptr;
+ eActionMap::getInstance(ptr);
- if (m_cursor < 0)
- cursorHome();
- else if (m_cursor > size())
- cursorEnd();
- return 0;
-}
-
-int eListboxTestContent::cursorGet()
-{
- return m_cursor;
-}
-
-void eListboxTestContent::cursorSave()
-{
- m_saved_cursor = m_cursor;
-}
-
-void eListboxTestContent::cursorRestore()
-{
- m_cursor = m_saved_cursor;
-}
-
-int eListboxTestContent::size()
-{
- return 10;
-}
+ m_itemheight = 25;
+ m_selection_enabled = 1;
-RESULT eListboxTestContent::connectItemChanged(const Slot0<void> &itemChanged, ePtr<eConnection> &connection)
-{
- return 0;
+ ptr->bindAction("ListboxActions", 0, 0, this);
}
-void eListboxTestContent::setSize(const eSize &size)
+eListbox::~eListbox()
{
- m_size = size;
+ ePtr<eActionMap> ptr;
+ eActionMap::getInstance(ptr);
+ ptr->unbindAction(this, 0);
}
-void eListboxTestContent::paint(gPainter &painter, eWindowStyle &style, const ePoint &offset, int selected)
+void eListbox::setScrollbarMode(int mode)
{
- ePtr<gFont> fnt = new gFont("Arial", 14);
- painter.clip(eRect(offset, m_size));
- style.setStyle(painter, selected ? eWindowStyle::styleListboxSelected : eWindowStyle::styleListboxNormal);
- painter.clear();
-
- if (cursorValid())
+ m_scrollbar_mode = mode;
+ if ( m_scrollbar_mode == showNever && m_scrollbar )
{
- painter.setFont(fnt);
- char string[10];
- sprintf(string, "%d.)", m_cursor);
-
- ePoint text_offset = offset + (selected ? ePoint(2, 2) : ePoint(1, 1));
-
- painter.renderText(eRect(text_offset, m_size), string);
-
- if (selected)
- style.drawFrame(painter, eRect(offset, m_size), eWindowStyle::frameListboxEntry);
+ delete m_scrollbar;
+ m_scrollbar=0;
+ }
+ else if (!m_scrollbar)
+ {
+ m_scrollbar = new eSlider(this);
+ m_scrollbar->hide();
+ m_scrollbar->setBorderWidth(1);
+ m_scrollbar->setOrientation(eSlider::orVertical);
+ m_scrollbar->setRange(0,100);
}
-
- painter.clippop();
-}
-
-eListbox::eListbox(eWidget *parent): eWidget(parent)
-{
- setContent(new eListboxTestContent());
- m_content->cursorHome();
- m_top = 0;
- m_selected = 0;
}
void eListbox::setContent(iListboxContent *content)
{
m_content = content;
+ 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;
+
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);
invalidate(inv);
}
+
+ if (m_scrollbar_mode != showNever)
+ updateScrollBar();
+}
+
+void eListbox::moveSelectionTo(int index)
+{
+ m_content->cursorHome();
+ m_content->cursorMove(index);
+ moveSelection(justCheck);
+}
+
+void eListbox::updateScrollBar()
+{
+ 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));
+ if ( !m_scrollbar->isVisible() )
+ m_scrollbar->show();
+ }
+ else if ( m_scrollbar_mode != showAlways )
+ {
+ if ( m_scrollbar->isVisible() )
+ {
+ m_content->setSize(eSize(width, m_itemheight));
+ m_scrollbar->hide(); // why this hide dont work???
+ }
+ }
+ }
+ int curVisiblePage = m_top / m_items_per_page;
+ if ( m_scrollbar->isVisible() &&
+ 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)
{
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_content->setSize(eSize(size().width(), m_itemheight));
m_items_per_page = size().height() / m_itemheight;
}
+
+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()
+{
+ m_content_changed=true;
+ m_prev_scrollbar_page=-1;
+ if (m_content)
+ m_content->cursorHome();
+ m_top = 0;
+ m_selected = 0;
+ moveSelection(justCheck);
+ invalidate();
+}
git.cweiske.de / enigma2.git / blobdiff