SlsDragAndDropContext.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#include "SlsDragAndDropContext.hxx"
 
#include <SlideSorter.hxx>
#include <model/SlideSorterModel.hxx>
#include <controller/SlideSorterController.hxx>
#include <controller/SlsInsertionIndicatorHandler.hxx>
#include <controller/SlsScrollBarManager.hxx>
#include <controller/SlsProperties.hxx>
#include <controller/SlsClipboard.hxx>
#include <controller/SlsTransferableData.hxx>
#include <Window.hxx>
#include <sdtreelb.hxx>
#include <sdmod.hxx>
 
namespace sd::slidesorter::controller {
 
DragAndDropContext::DragAndDropContext (SlideSorter& rSlideSorter)
    : mpTargetSlideSorter(&rSlideSorter),
      mnInsertionIndex(-1)
{
    // No Drag-and-Drop for master pages.
    if (rSlideSorter.GetModel().GetEditMode() != EditMode::Page)
        return;
 
    // For properly handling transferables created by the navigator we
    // need additional information.  For this a user data object is
    // created that contains the necessary information.
    SdTransferable* pTransferable = SD_MOD()->pTransferDrag;
    SdPageObjsTLV::SdPageObjsTransferable* pTreeListBoxTransferable
        = dynamic_cast<SdPageObjsTLV::SdPageObjsTransferable*>(pTransferable);
    if (pTreeListBoxTransferable!=nullptr && !TransferableData::GetFromTransferable(pTransferable))
    {
        pTransferable->AddUserData(
            sd::slidesorter::controller::Clipboard::CreateTransferableUserData(pTransferable));
    }
 
    rSlideSorter.GetController().GetInsertionIndicatorHandler()->UpdateIndicatorIcon(pTransferable);
}
 
DragAndDropContext::~DragAndDropContext() COVERITY_NOEXCEPT_FALSE
{
    SetTargetSlideSorter();
}
 
void DragAndDropContext::Dispose()
{
    mnInsertionIndex = -1;
}
 
void DragAndDropContext::UpdatePosition (
    const Point& rMousePosition,
    const InsertionIndicatorHandler::Mode eMode,
    const bool bAllowAutoScroll)
{
    if (mpTargetSlideSorter == nullptr)
        return;
 
    // Convert window coordinates into model coordinates (we need the
    // window coordinates for auto-scrolling because that remains
    // constant while scrolling.)
    sd::Window *pWindow = mpTargetSlideSorter->GetContentWindow().get();
    const Point aMouseModelPosition (pWindow->PixelToLogic(rMousePosition));
    std::shared_ptr<InsertionIndicatorHandler> pInsertionIndicatorHandler (
        mpTargetSlideSorter->GetController().GetInsertionIndicatorHandler());
 
    bool bDoAutoScroll = bAllowAutoScroll
            && mpTargetSlideSorter->GetController().GetScrollBarManager().AutoScroll(
                rMousePosition,
                [this, eMode, rMousePosition] () {
                    return this->UpdatePosition(rMousePosition, eMode, false);
                });
 
    if (!bDoAutoScroll)
    {
        pInsertionIndicatorHandler->UpdatePosition(aMouseModelPosition, eMode);
 
        // Remember the new insertion index.
        mnInsertionIndex = pInsertionIndicatorHandler->GetInsertionPageIndex();
        if (pInsertionIndicatorHandler->IsInsertionTrivial(mnInsertionIndex, eMode))
            mnInsertionIndex = -1;
    }
}
 
void DragAndDropContext::SetTargetSlideSorter()
{
    if (mpTargetSlideSorter != nullptr)
    {
        mpTargetSlideSorter->GetController().GetScrollBarManager().StopAutoScroll();
        mpTargetSlideSorter->GetController().GetInsertionIndicatorHandler()->End(
            Animator::AM_Animated);
    }
 
    mpTargetSlideSorter = nullptr;
}
 
} // end of namespace ::sd::slidesorter::controller
 
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