XML import corrections

[wxWidgets.git] / src / common / sizer.cpp

diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index a5a68e5c07f03930192876ad0ecb16f369e264e3..959ba220a81b668e69d236fac86000b017745181 100644 (file)
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -32,6 +32,7 @@
 #endif // WX_PRECOMP
 
 #include "wx/display.h"
 #endif // WX_PRECOMP
 
 #include "wx/display.h"

+#include "wx/vector.h"

 #include "wx/listimpl.cpp"
 
 
 #include "wx/listimpl.cpp"
 
 


@@ -581,25 +582,20 @@ bool wxSizerItem::IsShown() const
             return m_window->IsShown();
 
         case Item_Sizer:
             return m_window->IsShown();
 
         case Item_Sizer:

+        {

             // arbitrarily decide that if at least one of our elements is
             // shown, so are we (this arbitrariness is the reason for
             // deprecating this function)
             // arbitrarily decide that if at least one of our elements is
             // shown, so are we (this arbitrariness is the reason for
             // deprecating this function)

+            for ( wxSizerItemList::compatibility_iterator
+                    node = m_sizer->GetChildren().GetFirst();
+                  node;
+                  node = node->GetNext() )

             {
             {

-                // Some apps (such as dialog editors) depend on an empty sizer still
-                // being laid out correctly and reporting the correct size and position.
-                if (m_sizer->GetChildren().GetCount() == 0)
+                if ( node->GetData()->IsShown() )

                     return true;
                     return true;

-
-                for ( wxSizerItemList::compatibility_iterator
-                        node = m_sizer->GetChildren().GetFirst();
-                      node;
-                      node = node->GetNext() )
-                {
-                    if ( node->GetData()->IsShown() )
-                        return true;
-                }

             }
             return false;
             }
             return false;

+        }

 
         case Item_Spacer:
             return m_spacer->IsShown();
 
         case Item_Spacer:
             return m_spacer->IsShown();


@@ -1323,6 +1319,7 @@ wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
       m_vgap( vgap ),
       m_hgap( hgap )
 {
       m_vgap( vgap ),
       m_hgap( hgap )
 {

+    wxASSERT(cols >= 0);

 }
 
 wxGridSizer::wxGridSizer( int cols, const wxSize& gap )
 }
 
 wxGridSizer::wxGridSizer( int cols, const wxSize& gap )


@@ -1331,6 +1328,7 @@ wxGridSizer::wxGridSizer( int cols, const wxSize& gap )
       m_vgap( gap.GetHeight() ),
       m_hgap( gap.GetWidth() )
 {
       m_vgap( gap.GetHeight() ),
       m_hgap( gap.GetWidth() )
 {

+    wxASSERT(cols >= 0);

 }
 
 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 }
 
 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )


@@ -1339,6 +1337,7 @@ wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
       m_vgap( vgap ),
       m_hgap( hgap )
 {
       m_vgap( vgap ),
       m_hgap( hgap )
 {

+    wxASSERT(rows >= 0 && cols >= 0);

 }
 
 wxGridSizer::wxGridSizer( int rows, int cols, const wxSize& gap )
 }
 
 wxGridSizer::wxGridSizer( int rows, int cols, const wxSize& gap )


@@ -1347,6 +1346,7 @@ wxGridSizer::wxGridSizer( int rows, int cols, const wxSize& gap )
       m_vgap( gap.GetHeight() ),
       m_hgap( gap.GetWidth() )
 {
       m_vgap( gap.GetHeight() ),
       m_hgap( gap.GetWidth() )
 {

+    wxASSERT(rows >= 0 && cols >= 0);

 }
 
 wxSizerItem *wxGridSizer::DoInsert(size_t index, wxSizerItem *item)
 }
 
 wxSizerItem *wxGridSizer::DoInsert(size_t index, wxSizerItem *item)


@@ -1987,6 +1987,50 @@ wxSizerItem *wxBoxSizer::AddSpacer(int size)
     return IsVertical() ? Add(0, size) : Add(size, 0);
 }
 
     return IsVertical() ? Add(0, size) : Add(size, 0);
 }
 

+namespace
+{
+
+/*
+    Helper of RecalcSizes(): checks if there is enough remaining space for the
+    min size of the given item and returns its min size or the entire remaining
+    space depending on which one is greater.
+
+    This function updates the remaining space parameter to account for the size
+    effectively allocated to the item.
+ */
+int
+GetMinOrRemainingSize(int orient, const wxSizerItem *item, int *remainingSpace_)
+{
+    int& remainingSpace = *remainingSpace_;
+
+    wxCoord size;
+    if ( remainingSpace > 0 )
+    {
+        const wxSize sizeMin = item->GetMinSizeWithBorder();
+        size = orient == wxHORIZONTAL ? sizeMin.x : sizeMin.y;
+
+        if ( size >= remainingSpace )
+        {
+            // truncate the item to fit in the remaining space, this is better
+            // than showing it only partially in general, even if both choices
+            // are bad -- but there is nothing else we can do
+            size = remainingSpace;
+        }
+
+        remainingSpace -= size;
+    }
+    else // no remaining space
+    {
+        // no space at all left, no need to even query the item for its min
+        // size as we can't give it to it anyhow
+        size = 0;
+    }
+
+    return size;
+}
+
+} // anonymous namespace
+

 void wxBoxSizer::RecalcSizes()
 {
     if ( m_children.empty() )
 void wxBoxSizer::RecalcSizes()
 {
     if ( m_children.empty() )


@@ -1999,14 +2043,17 @@ void wxBoxSizer::RecalcSizes()
     // stretchable items (i.e. those with non zero proportion)
     int delta = totalMajorSize - GetSizeInMajorDir(m_minSize);
 
     // stretchable items (i.e. those with non zero proportion)
     int delta = totalMajorSize - GetSizeInMajorDir(m_minSize);
 

+    // declare loop variables used below:
+    wxSizerItemList::const_iterator i;  // iterator in m_children list
+    unsigned n = 0;                     // item index in majorSizes array

 
 

-    // Inform child items about the size in minor direction, that can
-    // change how much free space we have in major dir and how to distribute it.
-    int majorMinSum = 0;
-    wxSizerItemList::const_iterator i ;
-    for ( i = m_children.begin();
-          i != m_children.end();
-          ++i )
+
+    // First, inform item about the available size in minor direction as this
+    // can change their size in the major direction. Also compute the number of
+    // visible items and sum of their min sizes in major direction.
+
+    int minMajorSize = 0;
+    for ( i = m_children.begin(); i != m_children.end(); ++i )

     {
         wxSizerItem * const item = *i;
 
     {
         wxSizerItem * const item = *i;
 


@@ -2023,65 +2070,186 @@ void wxBoxSizer::RecalcSizes()
             // take too much, so delta should not become negative.
             delta -= deltaChange;
         }
             // take too much, so delta should not become negative.
             delta -= deltaChange;
         }

-        majorMinSum += GetSizeInMajorDir(item->GetMinSizeWithBorder());
+        minMajorSize += GetSizeInMajorDir(item->GetMinSizeWithBorder());

     }
     }

-    // And update our min size
-    SizeInMajorDir(m_minSize) = majorMinSum;

 
 

+    // update our min size and delta which may have changed
+    SizeInMajorDir(m_minSize) = minMajorSize;
+    delta = totalMajorSize - minMajorSize;

 
 

-    // might have a new delta now
-    delta = totalMajorSize - GetSizeInMajorDir(m_minSize);

 
 

-    // the position at which we put the next child
-    wxPoint pt(m_position);
+    // space and sum of proportions for the remaining items, both may change
+    // below
+    wxCoord remaining = totalMajorSize;
+    int totalProportion = m_totalProportion;

 
 

-    // space remaining for the items
-    wxCoord majorRemaining = totalMajorSize;
+    // size of the (visible) items in major direction, -1 means "not fixed yet"
+    wxVector<int> majorSizes(GetItemCount(), wxDefaultCoord);

 
 

-    int totalProportion = m_totalProportion;
-    for ( i = m_children.begin();
-          i != m_children.end();
-          ++i )
+
+    // Check for the degenerated case when we don't have enough space for even
+    // the min sizes of all the items: in this case we really can't do much
+    // more than to to allocate the min size to as many of fixed size items as
+    // possible (on the assumption that variable size items such as text zones
+    // or list boxes may use scrollbars to show their content even if their
+    // size is less than min size but that fixed size items such as buttons
+    // will suffer even more if we don't give them their min size)
+    if ( totalMajorSize < minMajorSize )

     {
     {

-        wxSizerItem * const item = *i;
+        // Second degenerated case pass: allocate min size to all fixed size
+        // items.
+        for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )
+        {
+            wxSizerItem * const item = *i;

 
 

-        if ( !item->IsShown() )
-            continue;
+            if ( !item->IsShown() )
+                continue;

 
 

-        const wxSize sizeThis(item->GetMinSizeWithBorder());
+            // deal with fixed size items only during this pass
+            if ( item->GetProportion() )
+                continue;
+
+            majorSizes[n] = GetMinOrRemainingSize(m_orient, item, &remaining);
+        }
+
+
+        // Third degenerated case pass: allocate min size to all the remaining,
+        // i.e. non-fixed size, items.
+        for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )
+        {
+            wxSizerItem * const item = *i;

 
 

-        // adjust the size in the major direction using the proportion
-        wxCoord majorSize = GetSizeInMajorDir(sizeThis);
+            if ( !item->IsShown() )
+                continue;
+
+            // we've already dealt with fixed size items above
+            if ( !item->GetProportion() )
+                continue;

 
 

-        if ( delta > 0 )
+            majorSizes[n] = GetMinOrRemainingSize(m_orient, item, &remaining);
+        }
+    }
+    else // we do have enough space to give at least min sizes to all items
+    {
+        // Second and maybe more passes in the non-degenerated case: deal with
+        // fixed size items and items whose min size is greater than what we
+        // would allocate to them taking their proportion into account. For
+        // both of them, we will just use their min size, but for the latter we
+        // also need to reexamine all the items as the items which fitted
+        // before we adjusted their size upwards might not fit any more. This
+        // does make for a quadratic algorithm but it's not obvious how to
+        // avoid it and hopefully it's not a huge problem in practice as the
+        // sizers don't have many items usually (and, of course, the algorithm
+        // still reduces into a linear one if there is enough space for all the
+        // min sizes).
+        bool nonFixedSpaceChanged = false;
+        for ( i = m_children.begin(), n = 0; ; ++i, ++n )

         {
         {

-            // distribute extra space among the items respecting their
-            // proportions
+            if ( nonFixedSpaceChanged )
+            {
+                i = m_children.begin();
+                n = 0;
+                nonFixedSpaceChanged = false;
+            }
+
+            // check for the end of the loop only after the check above as
+            // otherwise we wouldn't do another pass if the last child resulted
+            // in non fixed space reduction
+            if ( i == m_children.end() )
+                break;
+
+            wxSizerItem * const item = *i;
+
+            if ( !item->IsShown() )
+                continue;
+
+            // don't check the item which we had already dealt with during a
+            // previous pass (this is more than an optimization, the code
+            // wouldn't work correctly if we kept adjusting for the same item
+            // over and over again)
+            if ( majorSizes[n] != wxDefaultCoord )
+                continue;
+
+            wxCoord minMajor = GetSizeInMajorDir(item->GetMinSizeWithBorder());
+
+            // it doesn't make sense for min size to be negative but right now
+            // it's possible to create e.g. a spacer with (-1, 10) as size and
+            // people do it in their code apparently (see #11842) so ensure
+            // that we don't use this -1 as real min size as it conflicts with
+            // the meaning we use for it here and negative min sizes just don't
+            // make sense anyhow (which is why it might be a better idea to
+            // deal with them at wxSizerItem level in the future but for now
+            // this is the minimal fix for the bug)
+            if ( minMajor < 0 )
+                minMajor = 0;
+

             const int propItem = item->GetProportion();
             if ( propItem )
             {
             const int propItem = item->GetProportion();
             if ( propItem )
             {

-                const int deltaItem = (delta * propItem) / totalProportion;
-
-                majorSize += deltaItem;
+                // is the desired size of this item big enough?
+                if ( (remaining*propItem)/totalProportion >= minMajor )
+                {
+                    // yes, it is, we'll determine the real size of this
+                    // item later, for now just leave it as wxDefaultCoord
+                    continue;
+                }

 
 

-                delta -= deltaItem;
+                // the proportion of this item won't count, it has
+                // effectively become fixed

                 totalProportion -= propItem;
             }
                 totalProportion -= propItem;
             }

+
+            // we can already allocate space for this item
+            majorSizes[n] = minMajor;
+
+            // change the amount of the space remaining to the other items,
+            // as this can result in not being able to satisfy their
+            // proportions any more we will need to redo another loop
+            // iteration
+            remaining -= minMajor;
+
+            nonFixedSpaceChanged = true;

         }
         }

-        else // delta < 0
+
+
+        // Last by one pass: distribute the remaining space among the non-fixed
+        // items whose size weren't fixed yet according to their proportions.
+        for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )

         {
         {

-            // we're not going to have enough space for making all items even
-            // of their minimal size, check if this item still fits at all and
-            // truncate it if it doesn't -- even if it means giving it 0 size
-            // and thus making it invisible because we just can't do anything
-            // else
-            if ( majorSize > majorRemaining )
-                majorSize = majorRemaining;
+            wxSizerItem * const item = *i;

 
 

-            majorRemaining -= majorSize;
+            if ( !item->IsShown() )
+                continue;
+
+            if ( majorSizes[n] == wxDefaultCoord )
+            {
+                const int propItem = item->GetProportion();
+                majorSizes[n] = (remaining*propItem)/totalProportion;
+
+                remaining -= majorSizes[n];
+                totalProportion -= propItem;
+            }

         }
         }

+    }

 
 
 
 

+    // the position at which we put the next child
+    wxPoint pt(m_position);
+
+
+    // Final pass: finally do position the items correctly using their sizes as
+    // determined above.
+    for ( i = m_children.begin(), n = 0; i != m_children.end(); ++i, ++n )
+    {
+        wxSizerItem * const item = *i;
+
+        if ( !item->IsShown() )
+            continue;
+
+        const int majorSize = majorSizes[n];
+
+        const wxSize sizeThis(item->GetMinSizeWithBorder());
+

         // apply the alignment in the minor direction
         wxPoint posChild(pt);
 
         // apply the alignment in the minor direction
         wxPoint posChild(pt);
 


@@ -2131,7 +2299,12 @@ wxSize wxBoxSizer::CalcMin()
     m_totalProportion = 0;
     m_minSize = wxSize(0, 0);
 
     m_totalProportion = 0;
     m_minSize = wxSize(0, 0);
 

-    // calculate the minimal sizes for all items and count sum of proportions
+    // The minimal size for the sizer should be big enough to allocate its
+    // element at least its minimal size but also, and this is the non trivial
+    // part, to respect the children proportion. To satisfy the latter
+    // condition we must find the greatest min-size-to-proportion ratio for all
+    // elements with non-zero proportion.
+    float maxMinSizeToProp = 0.;

     for ( wxSizerItemList::const_iterator i = m_children.begin();
           i != m_children.end();
           ++i )
     for ( wxSizerItemList::const_iterator i = m_children.begin();
           i != m_children.end();
           ++i )


@@ -2142,13 +2315,31 @@ wxSize wxBoxSizer::CalcMin()
             continue;
 
         const wxSize sizeMinThis = item->CalcMin();
             continue;
 
         const wxSize sizeMinThis = item->CalcMin();

-        SizeInMajorDir(m_minSize) += GetSizeInMajorDir(sizeMinThis);
+        if ( const int propThis = item->GetProportion() )
+        {
+            float minSizeToProp = GetSizeInMajorDir(sizeMinThis);
+            minSizeToProp /= propThis;
+
+            if ( minSizeToProp > maxMinSizeToProp )
+                maxMinSizeToProp = minSizeToProp;
+
+            m_totalProportion += item->GetProportion();
+        }
+        else // fixed size item
+        {
+            // Just account for its size directly
+            SizeInMajorDir(m_minSize) += GetSizeInMajorDir(sizeMinThis);
+        }
+
+        // In the transversal direction we just need to find the maximum.

         if ( GetSizeInMinorDir(sizeMinThis) > GetSizeInMinorDir(m_minSize) )
             SizeInMinorDir(m_minSize) = GetSizeInMinorDir(sizeMinThis);
         if ( GetSizeInMinorDir(sizeMinThis) > GetSizeInMinorDir(m_minSize) )
             SizeInMinorDir(m_minSize) = GetSizeInMinorDir(sizeMinThis);

-
-        m_totalProportion += item->GetProportion();

     }
 
     }
 

+    // Using the max ratio ensures that the min size is big enough for all
+    // items to have their min size and satisfy the proportions among them.
+    SizeInMajorDir(m_minSize) += (int)(maxMinSizeToProp*m_totalProportion);
+

     return m_minSize;
 }
 
     return m_minSize;
 }
 


@@ -2380,30 +2571,38 @@ void wxStdDialogButtonSizer::Realize()
         // Extra space around and at the right
         Add(12, 40);
 #elif defined(__WXGTK20__)
         // Extra space around and at the right
         Add(12, 40);
 #elif defined(__WXGTK20__)

-        Add(0, 0, 0, wxLEFT, 9);
+        // http://library.gnome.org/devel/hig-book/stable/windows-alert.html.en
+        // says that the correct button order is
+        //
+        //      [Help]                  [Alternative] [Cancel] [Affirmative]
+
+        // Flags ensuring that margins between the buttons are 6 pixels.
+        const wxSizerFlags
+            flagsBtn = wxSizerFlags().Centre().Border(wxLEFT | wxRIGHT, 3);
+
+        // Margin around the entire sizer button should be 12.
+        AddSpacer(9);
+

         if (m_buttonHelp)
         if (m_buttonHelp)

-            Add((wxWindow*)m_buttonHelp, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
+            Add(m_buttonHelp, flagsBtn);

 
 

-        // extra whitespace between help and cancel/ok buttons
-        Add(0, 0, 1, wxEXPAND, 0);
+        // Align the rest of the buttons to the right.
+        AddStretchSpacer();

 
 

-        if (m_buttonNegative){
-            Add((wxWindow*)m_buttonNegative, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
-        }
+        if (m_buttonNegative)
+            Add(m_buttonNegative, flagsBtn);

 
 

-        // according to HIG, in explicit apply windows the order is:
-        // [ Help                     Apply   Cancel   OK ]

         if (m_buttonApply)
         if (m_buttonApply)

-            Add((wxWindow*)m_buttonApply, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
+            Add(m_buttonApply, flagsBtn);

 
 

-        if (m_buttonCancel){
-            Add((wxWindow*)m_buttonCancel, 0, wxALIGN_CENTRE | wxLEFT | wxRIGHT, 3);
-            // Cancel or help should be default
-            // m_buttonCancel->SetDefaultButton();
-        }
+        if (m_buttonCancel)
+            Add(m_buttonCancel, flagsBtn);

 
         if (m_buttonAffirmative)
 
         if (m_buttonAffirmative)

-            Add((wxWindow*)m_buttonAffirmative, 0, wxALIGN_CENTRE | wxLEFT, 6);
+            Add(m_buttonAffirmative, flagsBtn);
+
+        // Ensure that the right margin is 12 as well.
+        AddSpacer(9);

 #elif defined(__WXMSW__)
         // Windows
 
 #elif defined(__WXMSW__)
         // Windows