vcl/source/control/PriorityHBox.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <vcl/layout.hxx>
  21 #include <PriorityHBox.hxx>
  22 #include <comphelper/lok.hxx>
  23
  24 namespace
  25 {
  26 bool lcl_comparePriority(const vcl::IPrioritable* a, const vcl::IPrioritable* b)
  27 {
  28     return a->GetPriority() < b->GetPriority();
  29 }
  30 }
  31
  32 PriorityHBox::PriorityHBox(vcl::Window* pParent)
  33     : VclHBox(pParent)
  34     , m_bInitialized(false)
  35 {
  36 }
  37
  38 PriorityHBox::~PriorityHBox() { disposeOnce(); }
  39
  40 void PriorityHBox::Initialize()
  41 {
  42     m_bInitialized = true;
  43
  44     GetChildrenWithPriorities();
  45     SetSizeFromParent();
  46 }
  47
  48 int PriorityHBox::GetHiddenCount() const
  49 {
  50     int nCount = 0;
  51
  52     for (auto pWindow : m_aSortedChildren)
  53         if (pWindow->IsHidden())
  54             nCount++;
  55
  56     return nCount;
  57 }
  58
  59 void PriorityHBox::SetSizeFromParent()
  60 {
  61     vcl::Window* pParent = GetParent();
  62     if (pParent)
  63     {
  64         Size aParentSize = pParent->GetSizePixel();
  65         SetSizePixel(Size(aParentSize.getWidth(), aParentSize.getHeight()));
  66     }
  67 }
  68
  69 Size PriorityHBox::calculateRequisition() const
  70 {
  71     if (!m_bInitialized)
  72     {
  73         return VclHBox::calculateRequisition();
  74     }
  75
  76     sal_uInt16 nVisibleChildren = 0;
  77
  78     Size aSize;
  79     for (vcl::Window* pChild = GetWindow(GetWindowType::FirstChild); pChild;
  80          pChild = pChild->GetWindow(GetWindowType::Next))
  81     {
  82         if (!pChild->IsVisible())
  83             continue;
  84         ++nVisibleChildren;
  85         Size aChildSize = getLayoutRequisition(*pChild);
  86
  87         bool bAlwaysExpanded = true;
  88
  89         vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
  90         if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
  91             bAlwaysExpanded = false;
  92
  93         if (bAlwaysExpanded)
  94         {
  95             tools::Long nPrimaryDimension = getPrimaryDimension(aChildSize);
  96             nPrimaryDimension += pChild->get_padding() * 2;
  97             setPrimaryDimension(aChildSize, nPrimaryDimension);
  98         }
  99         else
 100             setPrimaryDimension(aChildSize, 0);
 101
 102         accumulateMaxes(aChildSize, aSize);
 103     }
 104
 105     return finalizeMaxes(aSize, nVisibleChildren);
 106 }
 107
 108 void PriorityHBox::Resize()
 109 {
 110     if (!m_bInitialized)
 111         Initialize();
 112
 113     if (!m_bInitialized || comphelper::LibreOfficeKit::isActive())
 114     {
 115         return VclHBox::Resize();
 116     }
 117
 118     tools::Long nWidth = GetSizePixel().Width();
 119     tools::Long nCurrentWidth = VclHBox::calculateRequisition().getWidth();
 120
 121     // Hide lower priority controls
 122     for (vcl::IPrioritable* pPrioritable : m_aSortedChildren)
 123     {
 124         if (nCurrentWidth <= nWidth)
 125             break;
 126
 127         vcl::Window* pWindow = dynamic_cast<vcl::Window*>(pPrioritable);
 128
 129         if (pWindow && pWindow->GetParent() == this)
 130         {
 131             nCurrentWidth -= pWindow->GetOutputSizePixel().Width() + get_spacing();
 132             pWindow->Show();
 133             pPrioritable->HideContent();
 134             nCurrentWidth += pWindow->GetOutputSizePixel().Width() + get_spacing();
 135         }
 136     }
 137
 138     auto pChildR = m_aSortedChildren.rbegin();
 139     // Show higher priority controls if we already have enough space
 140     while (pChildR != m_aSortedChildren.rend())
 141     {
 142         vcl::Window* pWindow = dynamic_cast<vcl::Window*>(*pChildR);
 143         vcl::IPrioritable* pPrioritable = *pChildR;
 144
 145         if (pWindow->GetParent() != this)
 146         {
 147             pChildR++;
 148             continue;
 149         }
 150
 151         if (pWindow)
 152         {
 153             nCurrentWidth -= pWindow->GetOutputSizePixel().Width() + get_spacing();
 154             pWindow->Show();
 155             pPrioritable->ShowContent();
 156             nCurrentWidth += getLayoutRequisition(*pWindow).Width() + get_spacing();
 157
 158             if (nCurrentWidth > nWidth)
 159             {
 160                 pPrioritable->HideContent();
 161                 break;
 162             }
 163         }
 164
 165         pChildR++;
 166     }
 167
 168     VclHBox::Resize();
 169 }
 170
 171 void PriorityHBox::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect)
 172 {
 173     if (!m_bInitialized)
 174         Initialize();
 175
 176     VclHBox::Paint(rRenderContext, rRect);
 177 }
 178
 179 void PriorityHBox::GetChildrenWithPriorities()
 180 {
 181     for (sal_uInt16 i = 0; i < GetChildCount(); ++i)
 182     {
 183         vcl::Window* pChild = GetChild(i);
 184
 185         // Add only containers which have explicitly assigned priority.
 186         vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
 187         if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
 188             m_aSortedChildren.push_back(pPrioritable);
 189     }
 190
 191     if (m_aSortedChildren.empty())
 192         m_bInitialized = false;
 193
 194     std::sort(m_aSortedChildren.begin(), m_aSortedChildren.end(), lcl_comparePriority);
 195 }
 196
 197 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */