Improved layout handler to support trees of nested arrays. Needed for converting and fixing the trade window.

1 files changed, 172 insertions, 59 deletions

diff --git a/src/gui/widgets/layout.cpp b/src/gui/widgets/layout.cpp
index 252cf198..2bcc558d 100644
--- a/src/gui/widgets/layout.cpp
+++ b/src/gui/widgets/layout.cpp
@@ -21,9 +21,103 @@
  *  $Id$
  */
 
+#include <cassert>
+
 #include "layout.h"
 
-void Layout::resizeGrid(int w, int h)
+ContainerPlacer ContainerPlacer::at(int x, int y)
+{
+    return ContainerPlacer(mContainer, &mCell->at(x, y));
+}
+
+LayoutCell &ContainerPlacer::operator()
+    (int x, int y, gcn::Widget *wg, int w, int h)
+{
+    mContainer->add(wg);
+    return mCell->place(wg, x, y, w, h);
+}
+
+LayoutCell::~LayoutCell()
+{
+    if (mType == ARRAY) delete mArray;
+}
+
+LayoutArray &LayoutCell::getArray()
+{
+    assert(mType != WIDGET);
+    if (mType == ARRAY) return *mArray;
+    mArray = new LayoutArray;
+    mType = ARRAY;
+    mExtent[0] = 1;
+    mExtent[1] = 1;
+    mPadding = 0;
+    mAlign[0] = FILL;
+    mAlign[1] = FILL;
+    return *mArray;
+}
+
+void LayoutCell::reflow(int nx, int ny, int nw, int nh)
+{
+    assert(mType != NONE);
+    nx += mPadding;
+    ny += mPadding;
+    nw -= 2 * mPadding;
+    nh -= 2 * mPadding;
+    if (mType == ARRAY)
+        mArray->reflow(nx, ny, nw, nh);
+    else
+        mWidget->setDimension(gcn::Rectangle(nx, ny, nw, nh));
+}
+
+void LayoutCell::computeSizes()
+{
+    assert(mType == ARRAY);
+
+    for (std::vector< std::vector< LayoutCell * > >::iterator
+         i = mArray->mCells.begin(), i_end = mArray->mCells.end();
+         i != i_end; ++i)
+    {
+        for (std::vector< LayoutCell * >::iterator
+             j = i->begin(), j_end = i->end(); j != j_end; ++j)
+        {
+            LayoutCell *cell = *j;
+            if (cell && cell->mType == ARRAY) cell->computeSizes();
+        }
+    }
+
+    mSize[0] = mArray->getSize(0);
+    mSize[1] = mArray->getSize(1);
+}
+
+LayoutArray::LayoutArray(): mSpacing(4)
+{
+}
+
+LayoutArray::~LayoutArray()
+{
+    for (std::vector< std::vector< LayoutCell * > >::iterator
+         i = mCells.begin(), i_end = mCells.end(); i != i_end; ++i)
+    {
+        for (std::vector< LayoutCell * >::iterator
+             j = i->begin(), j_end = i->end(); j != j_end; ++j)
+        {
+            delete *j;
+        }
+    }
+}
+
+LayoutCell &LayoutArray::at(int x, int y, int w, int h)
+{
+    resizeGrid(x + w, y + h);
+    LayoutCell *&cell = mCells[y][x];
+    if (!cell)
+    {
+        cell = new LayoutCell;
+    }
+    return *cell;
+}
+
+void LayoutArray::resizeGrid(int w, int h)
 {
     bool extW = w && w > (int)mSizes[0].size(),
          extH = h && h > (int)mSizes[1].size();
@@ -31,127 +125,128 @@ void Layout::resizeGrid(int w, int h)
 
     if (extH)
     {
-        mSizes[1].resize(h, FILL);
+        mSizes[1].resize(h, Layout::FILL);
         mCells.resize(h);
         if (!extW) w = mSizes[0].size();
     }
 
     if (extW)
     {
-        mSizes[0].resize(w, FILL);
+        mSizes[0].resize(w, Layout::FILL);
     }
 
-    for (std::vector< std::vector< Cell > >::iterator
+    for (std::vector< std::vector< LayoutCell * > >::iterator
          i = mCells.begin(), i_end = mCells.end(); i != i_end; ++i)
     {
-        i->resize(w);
+        i->resize(w, NULL);
     }
 }
 
-void Layout::setColWidth(int n, int w)
+void LayoutArray::setColWidth(int n, int w)
 {
     resizeGrid(n + 1, 0);
     mSizes[0][n] = w;
 }
 
-void Layout::setRowHeight(int n, int h)
+void LayoutArray::setRowHeight(int n, int h)
 {
     resizeGrid(0, n + 1);
     mSizes[1][n] = h;
 }
 
-void Layout::matchColWidth(int n1, int n2)
+void LayoutArray::matchColWidth(int n1, int n2)
 {
     resizeGrid(std::max(n1, n2) + 1, 0);
-    std::vector< int > widths = compute(0, mW);
+    std::vector< short > widths = getSizes(0, Layout::FILL);
     int s = std::max(widths[n1], widths[n2]);
     mSizes[0][n1] = s;
     mSizes[0][n2] = s;
 }
 
-Cell &Layout::place(gcn::Widget *widget, int x, int y, int w, int h)
+LayoutCell &LayoutArray::place(gcn::Widget *widget, int x, int y, int w, int h)
 {
-    resizeGrid(x + w, y + h);
-    Cell &cell = mCells[y][x];
+    LayoutCell &cell = at(x, y, w, h);
+    assert(cell.mType == LayoutCell::NONE);
+    cell.mType = LayoutCell::WIDGET;
     cell.mWidget = widget;
+    cell.mSize[0] = w == 1 ? widget->getWidth() : 0;
+    cell.mSize[1] = h == 1 ? widget->getHeight() : 0;
     cell.mExtent[0] = w;
     cell.mExtent[1] = h;
     cell.mPadding = 0;
-    cell.mAlign[0] = Cell::FILL;
-    cell.mAlign[1] = Cell::FILL;
-    int &cs = mSizes[0][x], &rs = mSizes[1][y];
-    if (cs == FILL) cs = 0;
-    if (rs == FILL) rs = 0;
+    cell.mAlign[0] = LayoutCell::FILL;
+    cell.mAlign[1] = LayoutCell::FILL;
+    short &cs = mSizes[0][x], &rs = mSizes[1][y];
+    if (cs == Layout::FILL && w == 1) cs = 0;
+    if (rs == Layout::FILL && h == 1) rs = 0;
     return cell;
 }
 
-void Layout::align(int &pos, int &size, int dim,
-                   Cell const &cell, int *sizes) const
+void LayoutArray::align(int &pos, int &size, int dim,
+                        LayoutCell const &cell, short *sizes) const
 {
-    int size_max = sizes[0] - cell.mPadding * 2;
+    int size_max = sizes[0];
     for (int i = 1; i < cell.mExtent[dim]; ++i)
         size_max += sizes[i] + mSpacing;
-    size = std::min(dim == 0 ? cell.mWidget->getWidth()
-                             : cell.mWidget->getHeight(), size_max);
-    pos += cell.mPadding;
+    size = std::min<int>(cell.mSize[dim], size_max);
 
     switch (cell.mAlign[dim])
     {
-        case Cell::LEFT:
+        case LayoutCell::LEFT:
             return;
-        case Cell::RIGHT:
+        case LayoutCell::RIGHT:
             pos += size_max - size;
             return;
-        case Cell::CENTER:
+        case LayoutCell::CENTER:
             pos += (size_max - size) / 2;
             return;
-        case Cell::FILL:
+        case LayoutCell::FILL:
             size = size_max;
             return;
     }
 }
 
-std::vector< int > Layout::compute(int dim, int upp) const
+std::vector< short > LayoutArray::getSizes(int dim, int upp) const
 {
     int gridW = mSizes[0].size(), gridH = mSizes[1].size();
-    std::vector< int > sizes = mSizes[dim];
+    std::vector< short > sizes = mSizes[dim];
 
     // Compute minimum sizes.
     for (int gridY = 0; gridY < gridH; ++gridY)
     {
         for (int gridX = 0; gridX < gridW; ++gridX)
         {
-            Cell const &cell = mCells[gridY][gridX];
-            if (!cell.mWidget) continue;
+            LayoutCell const *cell = mCells[gridY][gridX];
+            if (!cell || cell->mType == LayoutCell::NONE) continue;
 
-            if (cell.mExtent[dim] == 1)
+            if (cell->mExtent[dim] == 1)
             {
-                int s = dim == 0 ? cell.mWidget->getWidth()
-                                 : cell.mWidget->getHeight();
                 int n = dim == 0 ? gridX : gridY;
-                s += cell.mPadding * 2;
+                int s = cell->mSize[dim] + cell->mPadding * 2;
                 if (s > sizes[n]) sizes[n] = s;
             }
         }
     }
 
+    if (upp == Layout::FILL) return sizes;
+
     // Compute the FILL sizes.
     int nb = sizes.size();
     int nbFill = 0;
     for (int i = 0; i < nb; ++i)
     {
-        if (mSizes[dim][i] == FILL) ++nbFill;
-        if (sizes[i] == FILL) sizes[i] = 0;
+        if (mSizes[dim][i] == Layout::FILL) ++nbFill;
+        if (sizes[i] == Layout::FILL) sizes[i] = 0;
         else upp -= sizes[i];
         upp -= mSpacing;
     }
-    upp = upp + mSpacing - mMargin * 2;
+    upp = upp + mSpacing;
 
     if (nbFill == 0) return sizes;
 
     for (int i = 0; i < nb; ++i)
     {
-        if (mSizes[dim][i] != FILL) continue;
+        if (mSizes[dim][i] != Layout::FILL) continue;
         int s = upp / nbFill;
         sizes[i] += s;
         upp -= s;
@@ -161,43 +256,61 @@ std::vector< int > Layout::compute(int dim, int upp) const
     return sizes;
 }
 
-void Layout::reflow(int &nw, int &nh)
+int LayoutArray::getSize(int dim) const
+{
+    std::vector< short > sizes = getSizes(dim, Layout::FILL);
+    int size = 0;
+    int nb = sizes.size();
+    for (int i = 0; i < nb; ++i)
+    {
+        if (sizes[i] != Layout::FILL) size += sizes[i];
+        size += mSpacing;
+    }
+    return size - mSpacing;
+}
+
+void LayoutArray::reflow(int nx, int ny, int nw, int nh)
 {
     int gridW = mSizes[0].size(), gridH = mSizes[1].size();
 
-    std::vector< int > widths = compute(0, mW);
-    std::vector< int > heights = compute(1, mH);
+    std::vector< short > widths  = getSizes(0, nw);
+    std::vector< short > heights = getSizes(1, nh);
 
-    int x, y = mY + mMargin;
+    int y = ny;
     for (int gridY = 0; gridY < gridH; ++gridY)
     {
-        x = mX + mMargin;
+        int x = nx;
         for (int gridX = 0; gridX < gridW; ++gridX)
         {
-            Cell &cell = mCells[gridY][gridX];
-            if (cell.mWidget)
+            LayoutCell *cell = mCells[gridY][gridX];
+            if (cell && cell->mType != LayoutCell::NONE)
             {
                 int dx = x, dy = y, dw, dh;
-                align(dx, dw, 0, cell, &widths[gridX]);
-                align(dy, dh, 1, cell, &heights[gridY]);
-                cell.mWidget->setDimension(gcn::Rectangle(dx, dy, dw, dh));
+                align(dx, dw, 0, *cell, &widths[gridX]);
+                align(dy, dh, 1, *cell, &heights[gridY]);
+                cell->reflow(dx, dy, dw, dh);
             }
             x += widths[gridX] + mSpacing;
         }
         y += heights[gridY] + mSpacing;
     }
+}
 
-    nw = x - mX - mSpacing + mMargin;
-    nh = y - mY - mSpacing + mMargin;
+Layout::Layout(): mComputed(false)
+{
+    getArray();
+    setPadding(6);
 }
 
-void Layout::flush()
+void Layout::reflow(int &nw, int &nh)
 {
-    int w, h;
-    reflow(w, h);
-    mY += h;
-    mW = w;
-    mSizes[0].clear();
-    mSizes[1].clear();
-    mCells.clear();
+    if (!mComputed)
+    {
+        computeSizes();
+        mComputed = true;
+    }
+
+    nw = nw == 0 ? mSize[0] + 2 * mPadding : nw;
+    nh = nh == 0 ? mSize[1] + 2 * mPadding : nh;
+    LayoutCell::reflow(0, 0, nw, nh);
 }