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libreoffice/sfx2/source/control/thumbnailview.cxx
Daniel Baumann 8e63e14cf6
Adding upstream version 4:25.2.3. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-22 16:20:04 +02:00

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <config_wasm_strip.h>
#include <sfx2/thumbnailview.hxx>
#include <sfx2/thumbnailviewitem.hxx>
#include <utility>
#include "thumbnailviewacc.hxx"
#include <basegfx/color/bcolortools.hxx>
#include <comphelper/processfactory.hxx>
#include <drawinglayer/attribute/fontattribute.hxx>
#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx>
#include <drawinglayer/primitive2d/Primitive2DContainer.hxx>
#include <drawinglayer/primitive2d/textlayoutdevice.hxx>
#include <drawinglayer/processor2d/baseprocessor2d.hxx>
#include <drawinglayer/processor2d/processor2dtools.hxx>
#include <o3tl/safeint.hxx>
#include <rtl/ustring.hxx>
#include <sal/log.hxx>
#include <svtools/optionsdrawinglayer.hxx>
#include <comphelper/diagnose_ex.hxx>
#include <unotools/ucbstreamhelper.hxx>
#include <vcl/svapp.hxx>
#include <vcl/settings.hxx>
#include <vcl/event.hxx>
#include <vcl/filter/PngImageReader.hxx>
#include <vcl/weldutils.hxx>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/embed/ElementModes.hpp>
#include <com/sun/star/embed/StorageFactory.hpp>
#include <com/sun/star/embed/XStorage.hpp>
#include <memory>
#if !ENABLE_WASM_STRIP_RECENT
#include "recentdocsviewitem.hxx"
#endif
using namespace basegfx;
using namespace drawinglayer::attribute;
using namespace drawinglayer::primitive2d;
constexpr int gnFineness = 5;
bool ThumbnailView::renameItem(ThumbnailViewItem&, const OUString&)
{
// Do nothing by default
return false;
}
BitmapEx ThumbnailView::readThumbnail(const OUString &msURL)
{
using namespace ::com::sun::star;
using namespace ::com::sun::star::uno;
// Load the thumbnail from a template document.
uno::Reference<io::XInputStream> xIStream;
const uno::Reference< uno::XComponentContext >& xContext(::comphelper::getProcessComponentContext());
try
{
uno::Reference<lang::XSingleServiceFactory> xStorageFactory = embed::StorageFactory::create(xContext);
uno::Sequence<uno::Any> aArgs{ uno::Any(msURL), uno::Any(embed::ElementModes::READ) };
uno::Reference<embed::XStorage> xDocStorage (
xStorageFactory->createInstanceWithArguments(aArgs),
uno::UNO_QUERY);
try
{
if (xDocStorage.is())
{
uno::Reference<embed::XStorage> xStorage (
xDocStorage->openStorageElement(
u"Thumbnails"_ustr,
embed::ElementModes::READ));
if (xStorage.is())
{
uno::Reference<io::XStream> xThumbnailCopy (
xStorage->cloneStreamElement(u"thumbnail.png"_ustr));
if (xThumbnailCopy.is())
xIStream = xThumbnailCopy->getInputStream();
}
}
}
catch (const uno::Exception&)
{
TOOLS_WARN_EXCEPTION("sfx",
"caught exception while trying to access Thumbnail/thumbnail.png of " << msURL);
}
try
{
// An (older) implementation had a bug - The storage
// name was "Thumbnail" instead of "Thumbnails". The
// old name is still used as fallback but this code can
// be removed soon.
if ( ! xIStream.is())
{
uno::Reference<embed::XStorage> xStorage (
xDocStorage->openStorageElement( u"Thumbnail"_ustr,
embed::ElementModes::READ));
if (xStorage.is())
{
uno::Reference<io::XStream> xThumbnailCopy (
xStorage->cloneStreamElement(u"thumbnail.png"_ustr));
if (xThumbnailCopy.is())
xIStream = xThumbnailCopy->getInputStream();
}
}
}
catch (const uno::Exception&)
{
TOOLS_WARN_EXCEPTION("sfx",
"caught exception while trying to access Thumbnails/thumbnail.png of " << msURL);
}
}
catch (const uno::Exception&)
{
TOOLS_WARN_EXCEPTION("sfx",
"caught exception while trying to access thumbnail of "
<< msURL);
}
// Extract the image from the stream.
BitmapEx aThumbnail;
if (xIStream.is())
{
std::unique_ptr<SvStream> pStream (
::utl::UcbStreamHelper::CreateStream (xIStream));
vcl::PngImageReader aReader (*pStream);
aThumbnail = aReader.read ();
}
// Note that the preview is returned without scaling it to the desired
// width. This gives the caller the chance to take advantage of a
// possibly larger resolution then was asked for.
return aThumbnail;
}
ThumbnailView::ThumbnailView(std::unique_ptr<weld::ScrolledWindow> xWindow, std::unique_ptr<weld::Menu> xMenu)
: mnThumbnailHeight(0)
, mnDisplayHeight(0)
, mnVItemSpace(-1)
, mbAllowVScrollBar(xWindow->get_vpolicy() != VclPolicyType::NEVER)
, mbSelectOnFocus(true)
, mpItemAttrs(new ThumbnailItemAttributes)
, mxScrolledWindow(std::move(xWindow))
, mxContextMenu(std::move(xMenu))
{
ImplInit();
mxScrolledWindow->connect_vadjustment_changed(LINK(this, ThumbnailView, ImplScrollHdl));
}
ThumbnailView::~ThumbnailView()
{
if (mxAccessible.is())
mxAccessible->dispose();
mpItemAttrs.reset();
ImplDeleteItems();
}
bool ThumbnailView::MouseMove(const MouseEvent& rMEvt)
{
size_t nItemCount = mFilteredItemList.size();
Point aPoint = rMEvt.GetPosPixel();
for (size_t i = 0; i < nItemCount; i++)
{
ThumbnailViewItem *pItem = mFilteredItemList[i];
::tools::Rectangle aToInvalidate(pItem->updateHighlight(pItem->mbVisible && !rMEvt.IsLeaveWindow(), aPoint));
if (!aToInvalidate.IsEmpty() && IsReallyVisible() && IsUpdateMode())
Invalidate(aToInvalidate);
}
return true;
}
OUString ThumbnailView::RequestHelp(tools::Rectangle& rHelpRect)
{
if (!mbShowTooltips)
return OUString();
Point aPos = rHelpRect.TopLeft();
size_t nItemCount = mFilteredItemList.size();
for (size_t i = 0; i < nItemCount; i++)
{
ThumbnailViewItem *pItem = mFilteredItemList[i];
if (!pItem->mbVisible)
continue;
const tools::Rectangle& rDrawArea = pItem->getDrawArea();
if (rDrawArea.Contains(aPos))
{
rHelpRect = rDrawArea;
return pItem->getHelpText();
}
}
return OUString();
}
void ThumbnailView::AppendItem(std::unique_ptr<ThumbnailViewItem> pItem)
{
if (maFilterFunc(pItem.get()))
{
// Save current start,end range, iterator might get invalidated
size_t nSelStartPos = 0;
ThumbnailViewItem *pSelStartItem = nullptr;
if (mpStartSelRange != mFilteredItemList.end())
{
pSelStartItem = *mpStartSelRange;
nSelStartPos = mpStartSelRange - mFilteredItemList.begin();
}
mFilteredItemList.push_back(pItem.get());
mpStartSelRange = pSelStartItem != nullptr ? mFilteredItemList.begin() + nSelStartPos : mFilteredItemList.end();
}
mItemList.push_back(std::move(pItem));
}
void ThumbnailView::ImplInit()
{
mnItemWidth = 0;
mnItemHeight = 0;
mnItemPadding = 0;
mnVisLines = 0;
mnLines = 0;
mnFirstLine = 0;
mnCols = 0;
mbScroll = false;
mbHasVisibleItems = false;
mbShowTooltips = false;
mbDrawMnemonics = false;
mbAllowMultiSelection = true;
maFilterFunc = ViewFilterAll();
const StyleSettings& rSettings = Application::GetSettings().GetStyleSettings();
maFillColor = rSettings.GetFieldColor();
maTextColor = rSettings.GetWindowTextColor();
maHighlightColor = rSettings.GetHighlightColor();
maHighlightTextColor = rSettings.GetHighlightTextColor();
mfHighlightTransparence = SvtOptionsDrawinglayer::GetTransparentSelectionPercent() * 0.01;
mpStartSelRange = mFilteredItemList.end();
UpdateColors();
mpItemAttrs->nMaxTextLength = 0;
}
void ThumbnailView::UpdateColors()
{
mpItemAttrs->aFillColor = maFillColor.getBColor();
mpItemAttrs->aTextColor = maTextColor.getBColor();
mpItemAttrs->aHighlightColor = maHighlightColor.getBColor();
mpItemAttrs->aHighlightTextColor = maHighlightTextColor.getBColor();
mpItemAttrs->fHighlightTransparence = mfHighlightTransparence;
}
void ThumbnailView::ImplDeleteItems()
{
const size_t n = mItemList.size();
for ( size_t i = 0; i < n; ++i )
{
ThumbnailViewItem *const pItem = mItemList[i].get();
// deselect all current selected items and fire events
if (pItem->isSelected())
{
pItem->setSelection(false);
maItemStateHdl.Call(pItem);
// fire accessible event???
}
if ( pItem->isVisible() && ImplHasAccessibleListeners() )
{
css::uno::Any aOldAny, aNewAny;
aOldAny <<= css::uno::Reference<css::accessibility::XAccessible>(pItem->GetAccessible( false ));
ImplFireAccessibleEvent( css::accessibility::AccessibleEventId::CHILD, aOldAny, aNewAny );
}
mItemList[i].reset();
}
mItemList.clear();
mFilteredItemList.clear();
mpStartSelRange = mFilteredItemList.end();
}
void ThumbnailView::DrawItem(ThumbnailViewItem const *pItem)
{
if (pItem->isVisible())
{
::tools::Rectangle aRect = pItem->getDrawArea();
if (!aRect.IsEmpty())
Invalidate(aRect);
}
}
void ThumbnailView::OnItemDblClicked (ThumbnailViewItem*)
{
}
css::uno::Reference< css::accessibility::XAccessible > ThumbnailView::CreateAccessible()
{
mxAccessible.set(new ThumbnailViewAcc(this));
return mxAccessible;
}
const rtl::Reference< ThumbnailViewAcc > & ThumbnailView::getAccessible() const
{
return mxAccessible;
}
void ThumbnailView::CalculateItemPositions(bool bScrollBarUsed)
{
if (!mnItemHeight || !mnItemWidth)
return;
Size aWinSize = GetOutputSizePixel();
size_t nItemCount = mFilteredItemList.size();
// calculate window scroll ratio
float nScrollRatio;
if (bScrollBarUsed)
{
nScrollRatio = static_cast<float>(mxScrolledWindow->vadjustment_get_value()) /
static_cast<float>(mxScrolledWindow->vadjustment_get_upper() -
mxScrolledWindow->vadjustment_get_page_size());
}
else
nScrollRatio = 0;
// calculate ScrollBar width
tools::Long nScrBarWidth = mbAllowVScrollBar ? mxScrolledWindow->get_scroll_thickness() : 0;
// calculate maximum number of visible columns
mnCols = static_cast<sal_uInt16>((aWinSize.Width()-nScrBarWidth) / mnItemWidth);
if (!mnCols)
mnCols = 1;
// calculate maximum number of visible rows
mnVisLines = static_cast<sal_uInt16>(aWinSize.Height() / mnItemHeight);
// calculate empty space
tools::Long nHSpace = aWinSize.Width()-nScrBarWidth - mnCols*mnItemWidth;
tools::Long nVSpace = aWinSize.Height() - mnVisLines*mnItemHeight;
tools::Long nHItemSpace = nHSpace / (mnCols+1);
tools::Long nVItemSpace = mnVItemSpace;
if (nVItemSpace == -1) // auto, split up extra space to use as vertical spacing
nVItemSpace = nVSpace / (mnVisLines+1);
// tdf#162510 - calculate maximum number of rows
size_t nItemCountPinned = 0;
#if !ENABLE_WASM_STRIP_RECENT
bool bPinnedItems = true;
for (size_t i = 0; bPinnedItems && i < nItemCount; ++i)
{
ThumbnailViewItem& rItem = *mFilteredItemList[i];
if (auto const pRecentDocsItem = dynamic_cast<RecentDocsViewItem*>(&rItem))
{
if (pRecentDocsItem->isPinned())
++nItemCountPinned;
else
bPinnedItems = false;
}
}
#endif
// calculate maximum number of rows
// Floor( (M+N-1)/N )==Ceiling( M/N )
mnLines = (static_cast<tools::Long>(nItemCount - nItemCountPinned) + mnCols - 1) / mnCols;
// tdf#162510 - add pinned items to number of lines
mnLines += (static_cast<tools::Long>(nItemCountPinned) + mnCols - 1) / mnCols;
if ( !mnLines )
mnLines = 1;
if ( mnLines <= mnVisLines )
mnFirstLine = 0;
else if ( mnFirstLine > o3tl::make_unsigned(mnLines-mnVisLines) )
mnFirstLine = static_cast<sal_uInt16>(mnLines-mnVisLines);
mbHasVisibleItems = true;
tools::Long nFullSteps = (mnLines > mnVisLines) ? mnLines - mnVisLines + 1 : 1;
tools::Long nItemHeightOffset = mnItemHeight + nVItemSpace;
tools::Long nHiddenLines = static_cast<tools::Long>((nFullSteps - 1) * nScrollRatio);
// calculate offsets
tools::Long nStartX = nHItemSpace;
tools::Long nStartY = nVItemSpace;
// calculate and draw items
tools::Long x = nStartX;
tools::Long y = nStartY - ((nFullSteps - 1) * nScrollRatio - nHiddenLines) * nItemHeightOffset;
// draw items
// Unless we are scrolling (via scrollbar) we just use the precalculated
// mnFirstLine -- our nHiddenLines calculation takes into account only
// what the user has done with the scrollbar but not any changes of selection
// using the keyboard, meaning we could accidentally hide the selected item
// if we believe the scrollbar (fdo#72287).
size_t nFirstItem = (bScrollBarUsed ? nHiddenLines : mnFirstLine) * mnCols;
size_t nLastItem = nFirstItem + (mnVisLines + 1) * mnCols;
// tdf#162510 - helper for in order to handle accessibility events
auto handleAccessibleEvent = [&](ThumbnailViewItem& rItem, bool bIsVisible)
{
if (ImplHasAccessibleListeners())
{
css::uno::Any aOldAny, aNewAny;
if (bIsVisible)
aNewAny <<= css::uno::Reference<css::accessibility::XAccessible>(
rItem.GetAccessible(false));
else
aOldAny <<= css::uno::Reference<css::accessibility::XAccessible>(
rItem.GetAccessible(false));
ImplFireAccessibleEvent(css::accessibility::AccessibleEventId::CHILD, aOldAny, aNewAny);
}
};
// tdf#162510 - helper to set visibility and update layout
auto updateItemLayout = [&](ThumbnailViewItem& rItem, bool bIsVisible, size_t& nVisibleCount)
{
if (bIsVisible != rItem.isVisible())
{
handleAccessibleEvent(rItem, bIsVisible);
rItem.show(bIsVisible);
maItemStateHdl.Call(&rItem);
}
if (bIsVisible)
{
rItem.setDrawArea(::tools::Rectangle(Point(x, y), Size(mnItemWidth, mnItemHeight)));
rItem.calculateItemsPosition(mnThumbnailHeight, mnItemPadding,
mpItemAttrs->nMaxTextLength, mpItemAttrs.get());
if ((nVisibleCount + 1) % mnCols)
x += mnItemWidth + nHItemSpace;
else
{
x = nStartX;
y += mnItemHeight + nVItemSpace;
}
++nVisibleCount;
}
};
size_t nCurCountVisible = 0;
#if !ENABLE_WASM_STRIP_RECENT
// tdf#162510 - process pinned items
for (size_t i = 0; i < nItemCountPinned; i++)
updateItemLayout(*mFilteredItemList[i], nFirstItem <= i && i < nLastItem, nCurCountVisible);
// tdf#162510 - start a new line only if the entire line is not filled with pinned items
if (nCurCountVisible && nCurCountVisible % mnCols)
{
x = nStartX;
y += mnItemHeight + nVItemSpace;
}
// tdf#164102 - adjust first item only if there are any pinned items
if (const auto nRemainingPinnedSlots = nItemCountPinned % mnCols)
{
// tdf#162510 - adjust first item to take into account the new line after pinned items
const auto nFirstItemAdjustment = mnCols - nRemainingPinnedSlots;
if (nFirstItemAdjustment <= nFirstItem)
nFirstItem -= nFirstItemAdjustment;
}
#endif
// If want also draw parts of items in the last line,
// then we add one more line if parts of this line are visible
nCurCountVisible = 0;
for (size_t i = nItemCountPinned; i < nItemCount; i++)
updateItemLayout(*mFilteredItemList[i], nFirstItem <= i && i < nLastItem, nCurCountVisible);
// check if scroll is needed
mbScroll = mnLines > mnVisLines;
mxScrolledWindow->vadjustment_set_upper(mnLines * gnFineness);
mxScrolledWindow->vadjustment_set_page_size(mnVisLines * gnFineness);
if (!bScrollBarUsed)
mxScrolledWindow->vadjustment_set_value(static_cast<tools::Long>(mnFirstLine)*gnFineness);
tools::Long nPageSize = mnVisLines;
if ( nPageSize < 1 )
nPageSize = 1;
mxScrolledWindow->vadjustment_set_page_increment(nPageSize*gnFineness);
if (mbAllowVScrollBar)
mxScrolledWindow->set_vpolicy(mbScroll ? VclPolicyType::ALWAYS : VclPolicyType::NEVER);
}
size_t ThumbnailView::ImplGetItem( const Point& rPos ) const
{
if ( !mbHasVisibleItems )
{
return THUMBNAILVIEW_ITEM_NOTFOUND;
}
for (size_t i = 0; i < mFilteredItemList.size(); ++i)
{
if (mFilteredItemList[i]->isVisible() && mFilteredItemList[i]->getDrawArea().Contains(rPos))
return i;
}
return THUMBNAILVIEW_ITEM_NOTFOUND;
}
ThumbnailViewItem* ThumbnailView::ImplGetItem( size_t nPos )
{
return ( nPos < mFilteredItemList.size() ) ? mFilteredItemList[nPos] : nullptr;
}
sal_uInt16 ThumbnailView::ImplGetVisibleItemCount() const
{
sal_uInt16 nRet = 0;
const size_t nItemCount = mItemList.size();
for ( size_t n = 0; n < nItemCount; ++n )
{
if ( mItemList[n]->isVisible() )
++nRet;
}
return nRet;
}
ThumbnailViewItem* ThumbnailView::ImplGetVisibleItem( sal_uInt16 nVisiblePos )
{
const size_t nItemCount = mItemList.size();
for ( size_t n = 0; n < nItemCount; ++n )
{
ThumbnailViewItem *const pItem = mItemList[n].get();
if ( pItem->isVisible() && !nVisiblePos-- )
return pItem;
}
return nullptr;
}
void ThumbnailView::ImplFireAccessibleEvent( short nEventId, const css::uno::Any& rOldValue, const css::uno::Any& rNewValue )
{
if( mxAccessible )
mxAccessible->FireAccessibleEvent( nEventId, rOldValue, rNewValue );
}
bool ThumbnailView::ImplHasAccessibleListeners() const
{
return mxAccessible && mxAccessible->HasAccessibleListeners();
}
IMPL_LINK_NOARG(ThumbnailView, ImplScrollHdl, weld::ScrolledWindow&, void)
{
CalculateItemPositions(true);
if (IsReallyVisible() && IsUpdateMode())
Invalidate();
}
bool ThumbnailView::KeyInput( const KeyEvent& rKEvt )
{
bool bHandled = true;
// Get the last selected item in the list
size_t nLastPos = 0;
bool bFoundLast = false;
for ( tools::Long i = mFilteredItemList.size() - 1; !bFoundLast && i >= 0; --i )
{
ThumbnailViewItem* pItem = mFilteredItemList[i];
if ( pItem->isSelected() )
{
nLastPos = i;
bFoundLast = true;
}
}
bool bValidRange = false;
bool bHasSelRange = mpStartSelRange != mFilteredItemList.end();
size_t nNextPos = nLastPos;
vcl::KeyCode aKeyCode = rKEvt.GetKeyCode();
ThumbnailViewItem* pNext = nullptr;
if (aKeyCode.IsShift() && bHasSelRange)
{
//If the last element selected is the start range position
//search for the first selected item
size_t nSelPos = mpStartSelRange - mFilteredItemList.begin();
if (nLastPos == nSelPos)
{
while (nLastPos && mFilteredItemList[nLastPos-1]->isSelected())
--nLastPos;
}
}
switch ( aKeyCode.GetCode() )
{
case KEY_RIGHT:
if (!mFilteredItemList.empty())
{
if ( bFoundLast && nLastPos + 1 < mFilteredItemList.size() )
{
bValidRange = true;
nNextPos = nLastPos + 1;
}
pNext = mFilteredItemList[nNextPos];
}
break;
case KEY_LEFT:
if (!mFilteredItemList.empty())
{
if ( nLastPos > 0 )
{
bValidRange = true;
nNextPos = nLastPos - 1;
}
pNext = mFilteredItemList[nNextPos];
}
break;
case KEY_DOWN:
if (!mFilteredItemList.empty())
{
if ( bFoundLast )
{
//If we are in the second last row just go the one in
//the row below, if there's not row below just go to the
//last item but for the last row don't do anything.
if ( nLastPos + mnCols < mFilteredItemList.size( ) )
{
bValidRange = true;
nNextPos = nLastPos + mnCols;
}
else
{
int curRow = nLastPos/mnCols;
if (curRow < mnLines-1)
nNextPos = mFilteredItemList.size()-1;
}
}
pNext = mFilteredItemList[nNextPos];
}
break;
case KEY_UP:
if (!mFilteredItemList.empty())
{
if ( nLastPos >= mnCols )
{
bValidRange = true;
nNextPos = nLastPos - mnCols;
}
pNext = mFilteredItemList[nNextPos];
}
break;
case KEY_RETURN:
{
if ( bFoundLast )
OnItemDblClicked( mFilteredItemList[nLastPos] );
}
[[fallthrough]];
default:
bHandled = CustomWidgetController::KeyInput(rKEvt);
}
if ( pNext )
{
if (aKeyCode.IsShift() && bValidRange && mbAllowMultiSelection)
{
std::pair<size_t,size_t> aRange;
size_t nSelPos = mpStartSelRange - mFilteredItemList.begin();
if (nLastPos < nSelPos)
{
if (nNextPos > nLastPos)
{
if ( nNextPos > nSelPos)
aRange = std::make_pair(nLastPos,nNextPos);
else
aRange = std::make_pair(nLastPos,nNextPos-1);
}
else
aRange = std::make_pair(nNextPos,nLastPos-1);
}
else if (nLastPos == nSelPos)
{
if (nNextPos > nLastPos)
aRange = std::make_pair(nLastPos+1,nNextPos);
else
aRange = std::make_pair(nNextPos,nLastPos-1);
}
else
{
if (nNextPos > nLastPos)
aRange = std::make_pair(nLastPos+1,nNextPos);
else
{
if ( nNextPos < nSelPos)
aRange = std::make_pair(nNextPos,nLastPos);
else
aRange = std::make_pair(nNextPos+1,nLastPos);
}
}
for (size_t i = aRange.first; i <= aRange.second; ++i)
{
if (i != nSelPos)
{
ThumbnailViewItem *pCurItem = mFilteredItemList[i];
pCurItem->setSelection(!pCurItem->isSelected());
DrawItem(pCurItem);
maItemStateHdl.Call(pCurItem);
}
}
}
else if (!aKeyCode.IsShift())
{
deselectItems();
SelectItem(pNext->mnId);
//Mark it as the selection range start position
mpStartSelRange = mFilteredItemList.begin() + nNextPos;
}
MakeItemVisible(pNext->mnId);
}
return bHandled;
}
void ThumbnailView::MakeItemVisible( sal_uInt16 nItemId )
{
// Get the item row
size_t nPos = 0;
bool bFound = false;
for ( size_t i = 0; !bFound && i < mFilteredItemList.size(); ++i )
{
ThumbnailViewItem* pItem = mFilteredItemList[i];
if ( pItem->mnId == nItemId )
{
nPos = i;
bFound = true;
}
}
sal_uInt16 nRow = mnCols ? nPos / mnCols : 0;
// Move the visible rows as little as possible to include that one
if ( nRow < mnFirstLine )
mnFirstLine = nRow;
else if ( nRow > mnFirstLine + mnVisLines )
mnFirstLine = nRow - mnVisLines;
CalculateItemPositions();
Invalidate();
}
bool ThumbnailView::MouseButtonDown( const MouseEvent& rMEvt )
{
GrabFocus();
if (!rMEvt.IsLeft())
{
return CustomWidgetController::MouseButtonDown( rMEvt );
}
size_t nPos = ImplGetItem(rMEvt.GetPosPixel());
ThumbnailViewItem* pItem = ImplGetItem(nPos);
if ( !pItem )
{
deselectItems();
return CustomWidgetController::MouseButtonDown( rMEvt );
}
if ( rMEvt.GetClicks() == 2 )
{
OnItemDblClicked(pItem);
return true;
}
if(rMEvt.GetClicks() == 1)
{
if (rMEvt.IsMod1())
{
//Keep selected item group state and just invert current desired one state
pItem->setSelection(!pItem->isSelected());
//This one becomes the selection range start position if it changes its state to selected otherwise resets it
mpStartSelRange = pItem->isSelected() ? mFilteredItemList.begin() + nPos : mFilteredItemList.end();
}
else if (rMEvt.IsShift() && mpStartSelRange != mFilteredItemList.end())
{
std::pair<size_t,size_t> aNewRange;
aNewRange.first = mpStartSelRange - mFilteredItemList.begin();
aNewRange.second = nPos;
if (aNewRange.first > aNewRange.second)
std::swap(aNewRange.first,aNewRange.second);
//Deselect the ones outside of it
for (size_t i = 0, n = mFilteredItemList.size(); i < n; ++i)
{
ThumbnailViewItem *pCurItem = mFilteredItemList[i];
if (pCurItem->isSelected() && (i < aNewRange.first || i > aNewRange.second))
{
pCurItem->setSelection(false);
DrawItem(pCurItem);
maItemStateHdl.Call(pCurItem);
}
}
size_t nSelPos = mpStartSelRange - mFilteredItemList.begin();
//Select the items between start range and the selected item
if (nSelPos != nPos)
{
int dir = nSelPos < nPos ? 1 : -1;
size_t nCurPos = nSelPos + dir;
while (nCurPos != nPos)
{
ThumbnailViewItem *pCurItem = mFilteredItemList[nCurPos];
if (!pCurItem->isSelected())
{
pCurItem->setSelection(true);
DrawItem(pCurItem);
maItemStateHdl.Call(pCurItem);
}
nCurPos += dir;
}
}
pItem->setSelection(true);
}
else
{
//If we got a group of selected items deselect the rest and only keep the desired one
//mark items as not selected to not fire unnecessary change state events.
pItem->setSelection(false);
deselectItems();
pItem->setSelection(true);
//Mark as initial selection range position and reset end one
mpStartSelRange = mFilteredItemList.begin() + nPos;
}
if (!pItem->isHighlighted())
DrawItem(pItem);
maItemStateHdl.Call(pItem);
//fire accessible event??
}
return true;
}
void ThumbnailView::SetDrawingArea(weld::DrawingArea* pDrawingArea)
{
CustomWidgetController::SetDrawingArea(pDrawingArea);
OutputDevice& rDevice = pDrawingArea->get_ref_device();
weld::SetPointFont(rDevice, pDrawingArea->get_font());
mpItemAttrs->aFontAttr = getFontAttributeFromVclFont(mpItemAttrs->aFontSize, rDevice.GetFont(), false, true);
SetOutputSizePixel(pDrawingArea->get_preferred_size());
}
void ThumbnailView::Paint(vcl::RenderContext& rRenderContext, const ::tools::Rectangle& /*rRect*/)
{
rRenderContext.Push(vcl::PushFlags::ALL);
rRenderContext.SetTextFillColor();
rRenderContext.SetBackground(maFillColor);
size_t nItemCount = mItemList.size();
// Draw background
drawinglayer::primitive2d::Primitive2DContainer aSeq(1);
aSeq[0] = drawinglayer::primitive2d::Primitive2DReference(
new PolyPolygonColorPrimitive2D(
B2DPolyPolygon( ::tools::Polygon(::tools::Rectangle(Point(), GetOutputSizePixel()), 0, 0).getB2DPolygon()),
maFillColor.getBColor()));
// Create the processor and process the primitives
const drawinglayer::geometry::ViewInformation2D aNewViewInfos;
std::unique_ptr<drawinglayer::processor2d::BaseProcessor2D> pProcessor(
drawinglayer::processor2d::createProcessor2DFromOutputDevice(rRenderContext, aNewViewInfos));
pProcessor->process(aSeq);
// draw items
for (size_t i = 0; i < nItemCount; i++)
{
ThumbnailViewItem *const pItem = mItemList[i].get();
if (!pItem->isVisible())
continue;
pItem->Paint(pProcessor.get(), mpItemAttrs.get());
}
rRenderContext.Pop();
}
void ThumbnailView::GetFocus()
{
if (mbSelectOnFocus)
{
// Select the first item if nothing selected
int nSelected = -1;
for (size_t i = 0, n = mItemList.size(); i < n && nSelected == -1; ++i)
{
if (mItemList[i]->isSelected())
nSelected = i;
}
if (nSelected == -1 && !mItemList.empty())
{
ThumbnailViewItem* pFirst = nullptr;
if (!mFilteredItemList.empty()) {
pFirst = mFilteredItemList[0];
} else {
pFirst = mItemList[0].get();
}
SelectItem(pFirst->mnId);
}
}
// Tell the accessible object that we got the focus.
if( mxAccessible )
mxAccessible->GetFocus();
CustomWidgetController::GetFocus();
}
void ThumbnailView::LoseFocus()
{
CustomWidgetController::LoseFocus();
// Tell the accessible object that we lost the focus.
if( mxAccessible )
mxAccessible->LoseFocus();
}
void ThumbnailView::Resize()
{
CustomWidgetController::Resize();
CalculateItemPositions();
if ( IsReallyVisible() && IsUpdateMode() )
Invalidate();
}
void ThumbnailView::RemoveItem( sal_uInt16 nItemId )
{
size_t nPos = GetItemPos( nItemId );
if ( nPos == THUMBNAILVIEW_ITEM_NOTFOUND )
return;
if ( nPos < mFilteredItemList.size() ) {
// keep it alive until after we have deleted it from the filter item list
std::unique_ptr<ThumbnailViewItem> xKeepAliveViewItem;
// delete item from the thumbnail list
for (auto it = mItemList.begin(); it != mItemList.end(); ++it)
{
if ((*it)->mnId == nItemId)
{
xKeepAliveViewItem = std::move(*it);
mItemList.erase(it);
break;
}
}
// delete item from the filter item list
ThumbnailValueItemList::iterator it = mFilteredItemList.begin();
::std::advance( it, nPos );
if ((*it)->isSelected())
{
(*it)->setSelection(false);
maItemStateHdl.Call(*it);
}
mFilteredItemList.erase( it );
mpStartSelRange = mFilteredItemList.end();
}
CalculateItemPositions();
if ( IsReallyVisible() && IsUpdateMode() )
Invalidate();
}
void ThumbnailView::Clear()
{
ImplDeleteItems();
// reset variables
mnFirstLine = 0;
CalculateItemPositions();
if ( IsReallyVisible() && IsUpdateMode() )
Invalidate();
}
void ThumbnailView::updateItems (std::vector<std::unique_ptr<ThumbnailViewItem>> items)
{
ImplDeleteItems();
// reset variables
mnFirstLine = 0;
mItemList = std::move(items);
filterItems(maFilterFunc);
}
size_t ThumbnailView::GetItemPos( sal_uInt16 nItemId ) const
{
for ( size_t i = 0, n = mFilteredItemList.size(); i < n; ++i ) {
if ( mFilteredItemList[i]->mnId == nItemId ) {
return i;
}
}
return THUMBNAILVIEW_ITEM_NOTFOUND;
}
sal_uInt16 ThumbnailView::GetItemId( size_t nPos ) const
{
return ( nPos < mFilteredItemList.size() ) ? mFilteredItemList[nPos]->mnId : 0 ;
}
sal_uInt16 ThumbnailView::GetItemId( const Point& rPos ) const
{
size_t nItemPos = ImplGetItem( rPos );
if ( nItemPos != THUMBNAILVIEW_ITEM_NOTFOUND )
return GetItemId( nItemPos );
return 0;
}
void ThumbnailView::setItemMaxTextLength(sal_uInt32 nLength)
{
mpItemAttrs->nMaxTextLength = nLength;
}
void ThumbnailView::setItemDimensions(tools::Long itemWidth, tools::Long thumbnailHeight, tools::Long displayHeight, int itemPadding)
{
mnItemWidth = itemWidth + 2*itemPadding;
mnThumbnailHeight = thumbnailHeight;
mnDisplayHeight = displayHeight;
mnItemPadding = itemPadding;
mnItemHeight = mnDisplayHeight + mnThumbnailHeight + 2*itemPadding;
}
void ThumbnailView::SelectItem( sal_uInt16 nItemId )
{
size_t nItemPos = GetItemPos( nItemId );
if ( nItemPos == THUMBNAILVIEW_ITEM_NOTFOUND )
return;
ThumbnailViewItem* pItem = mFilteredItemList[nItemPos];
if (pItem->isSelected())
return;
pItem->setSelection(true);
maItemStateHdl.Call(pItem);
if (IsReallyVisible() && IsUpdateMode())
Invalidate();
bool bNewOut = IsReallyVisible() && IsUpdateMode();
// if necessary scroll to the visible area
if (mbScroll && nItemId && mnCols)
{
sal_uInt16 nNewLine = static_cast<sal_uInt16>(nItemPos / mnCols);
if ( nNewLine < mnFirstLine )
{
mnFirstLine = nNewLine;
}
else if ( mnVisLines != 0 && nNewLine > o3tl::make_unsigned(mnFirstLine+mnVisLines-1) )
{
mnFirstLine = static_cast<sal_uInt16>(nNewLine-mnVisLines+1);
}
}
if ( bNewOut )
{
if ( IsReallyVisible() && IsUpdateMode() )
Invalidate();
}
if( !ImplHasAccessibleListeners() )
return;
// focus event (select)
const rtl::Reference<ThumbnailViewItemAcc> & pItemAcc = pItem->GetAccessible( false );
if( pItemAcc )
{
css::uno::Any aOldAny, aNewAny;
aNewAny <<= css::uno::Reference<css::accessibility::XAccessible>( pItemAcc );
ImplFireAccessibleEvent( css::accessibility::AccessibleEventId::ACTIVE_DESCENDANT_CHANGED, aOldAny, aNewAny );
}
// selection event
css::uno::Any aOldAny, aNewAny;
ImplFireAccessibleEvent( css::accessibility::AccessibleEventId::SELECTION_CHANGED, aOldAny, aNewAny );
}
bool ThumbnailView::IsItemSelected( sal_uInt16 nItemId ) const
{
size_t nItemPos = GetItemPos( nItemId );
if ( nItemPos == THUMBNAILVIEW_ITEM_NOTFOUND )
return false;
ThumbnailViewItem* pItem = mFilteredItemList[nItemPos];
return pItem->isSelected();
}
void ThumbnailView::deselectItems()
{
for (std::unique_ptr<ThumbnailViewItem>& p : mItemList)
{
if (p->isSelected())
{
p->setSelection(false);
maItemStateHdl.Call(p.get());
}
}
if (IsReallyVisible() && IsUpdateMode())
Invalidate();
}
void ThumbnailView::ShowTooltips( bool bShowTooltips )
{
mbShowTooltips = bShowTooltips;
}
void ThumbnailView::DrawMnemonics( bool bDrawMnemonics )
{
mbDrawMnemonics = bDrawMnemonics;
}
void ThumbnailView::filterItems(const std::function<bool (const ThumbnailViewItem*)> &func)
{
mnFirstLine = 0; // start at the top of the list instead of the current position
maFilterFunc = func;
size_t nSelPos = 0;
bool bHasSelRange = false;
ThumbnailViewItem *curSel = mpStartSelRange != mFilteredItemList.end() ? *mpStartSelRange : nullptr;
mFilteredItemList.clear();
for (size_t i = 0, n = mItemList.size(); i < n; ++i)
{
ThumbnailViewItem *const pItem = mItemList[i].get();
if (maFilterFunc(pItem))
{
if (curSel == pItem)
{
nSelPos = i;
bHasSelRange = true;
}
mFilteredItemList.push_back(pItem);
}
else
{
if( pItem->isVisible())
{
if ( ImplHasAccessibleListeners() )
{
css::uno::Any aOldAny, aNewAny;
aOldAny <<= css::uno::Reference<css::accessibility::XAccessible>(pItem->GetAccessible( false ));
ImplFireAccessibleEvent( css::accessibility::AccessibleEventId::CHILD, aOldAny, aNewAny );
}
pItem->show(false);
pItem->setSelection(false);
maItemStateHdl.Call(pItem);
}
}
}
mpStartSelRange = bHasSelRange ? mFilteredItemList.begin() + nSelPos : mFilteredItemList.end();
CalculateItemPositions();
Invalidate();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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