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 void PriorityHBox::SetSizeFromParent()
  49 {
  50     vcl::Window* pParent = GetParent();
  51     if (pParent)
  52     {
  53         Size aParentSize = pParent->GetSizePixel();
  54         SetSizePixel(Size(aParentSize.getWidth(), aParentSize.getHeight()));
  55     }
  56 }
  57
  58 Size PriorityHBox::calculateRequisition() const
  59 {
  60     if (!m_bInitialized)
  61     {
  62         return VclHBox::calculateRequisition();
  63     }
  64
  65     sal_uInt16 nVisibleChildren = 0;
  66
  67     Size aSize;
  68     for (vcl::Window* pChild = GetWindow(GetWindowType::FirstChild); pChild;
  69          pChild = pChild->GetWindow(GetWindowType::Next))
  70     {
  71         if (!pChild->IsVisible())
  72             continue;
  73         ++nVisibleChildren;
  74         Size aChildSize = getLayoutRequisition(*pChild);
  75
  76         bool bAlwaysExpanded = true;
  77
  78         vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
  79         if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
  80             bAlwaysExpanded = false;
  81
  82         if (bAlwaysExpanded)
  83         {
  84             tools::Long nPrimaryDimension = getPrimaryDimension(aChildSize);
  85             nPrimaryDimension += pChild->get_padding() * 2;
  86             setPrimaryDimension(aChildSize, nPrimaryDimension);
  87         }
  88         else
  89             setPrimaryDimension(aChildSize, 0);
  90
  91         accumulateMaxes(aChildSize, aSize);
  92     }
  93
  94     return finalizeMaxes(aSize, nVisibleChildren);
  95 }
  96
  97 void PriorityHBox::Resize()
  98 {
  99     if (!m_bInitialized)
 100         Initialize();
 101
 102     if (!m_bInitialized || comphelper::LibreOfficeKit::isActive())
 103     {
 104         return VclHBox::Resize();
 105     }
 106
 107     tools::Long nWidth = GetSizePixel().Width();
 108     tools::Long nCurrentWidth = VclHBox::calculateRequisition().getWidth();
 109
 110     // Hide lower priority controls
 111     for (vcl::IPrioritable* pPrioritable : m_aSortedChildren)
 112     {
 113         if (nCurrentWidth <= nWidth)
 114             break;
 115
 116         vcl::Window* pWindow = dynamic_cast<vcl::Window*>(pPrioritable);
 117
 118         if (pWindow && pWindow->GetParent() == this)
 119         {
 120             nCurrentWidth -= pWindow->GetOutputSizePixel().Width() + get_spacing();
 121             pWindow->Show();
 122             pPrioritable->HideContent();
 123             nCurrentWidth += pWindow->GetOutputSizePixel().Width() + get_spacing();
 124         }
 125     }
 126
 127     auto pChildR = m_aSortedChildren.rbegin();
 128     // Show higher priority controls if we already have enough space
 129     while (pChildR != m_aSortedChildren.rend())
 130     {
 131         vcl::Window* pWindow = dynamic_cast<vcl::Window*>(*pChildR);
 132         vcl::IPrioritable* pPrioritable = *pChildR;
 133
 134         if (pWindow->GetParent() != this)
 135         {
 136             pChildR++;
 137             continue;
 138         }
 139
 140         if (pWindow)
 141         {
 142             nCurrentWidth -= pWindow->GetOutputSizePixel().Width() + get_spacing();
 143             pWindow->Show();
 144             pPrioritable->ShowContent();
 145             nCurrentWidth += getLayoutRequisition(*pWindow).Width() + get_spacing();
 146
 147             if (nCurrentWidth > nWidth)
 148             {
 149                 pPrioritable->HideContent();
 150                 break;
 151             }
 152         }
 153
 154         pChildR++;
 155     }
 156
 157     VclHBox::Resize();
 158 }
 159
 160 void PriorityHBox::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& rRect)
 161 {
 162     if (!m_bInitialized)
 163         Initialize();
 164
 165     VclHBox::Paint(rRenderContext, rRect);
 166 }
 167
 168 void PriorityHBox::GetChildrenWithPriorities()
 169 {
 170     for (sal_uInt16 i = 0; i < GetChildCount(); ++i)
 171     {
 172         vcl::Window* pChild = GetChild(i);
 173
 174         // Add only containers which have explicitly assigned priority.
 175         vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
 176         if (pPrioritable && pPrioritable->GetPriority() != VCL_PRIORITY_DEFAULT)
 177             m_aSortedChildren.push_back(pPrioritable);
 178     }
 179
 180     if (m_aSortedChildren.empty())
 181         m_bInitialized = false;
 182
 183     std::sort(m_aSortedChildren.begin(), m_aSortedChildren.end(), lcl_comparePriority);
 184 }
 185
 186 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */