void updateVisibleArea (const bool makeSureItUpdatesContent)
{
hasUpdated = false;
const int newX = getViewedComponent()->getX();
int newY = getViewedComponent()->getY();
const int newW = jmax (owner.minimumRowWidth, getMaximumVisibleWidth());
const int newH = owner.totalItems * owner.getRowHeight();
if (newY + newH < getMaximumVisibleHeight() && newH > getMaximumVisibleHeight())
newY = getMaximumVisibleHeight() - newH;
getViewedComponent()->setBounds (newX, newY, newW, newH);
if (makeSureItUpdatesContent && ! hasUpdated)
updateContents();
}
void updateContents()
{
hasUpdated = true;
const int rowHeight = owner.getRowHeight();
if (rowHeight > 0)
{
const int y = getViewPositionY();
const int w = getViewedComponent()->getWidth();
const int numNeeded = 2 + getMaximumVisibleHeight() / rowHeight;
rows.removeRange (numNeeded, rows.size());
while (numNeeded > rows.size())
{
ListBoxRowComponent* newRow = new ListBoxRowComponent (owner);
rows.add (newRow);
getViewedComponent()->addAndMakeVisible (newRow);
}
firstIndex = y / rowHeight;
firstWholeIndex = (y + rowHeight - 1) / rowHeight;
lastWholeIndex = (y + getMaximumVisibleHeight() - 1) / rowHeight;
for (int i = 0; i < numNeeded; ++i)
{
const int row = i + firstIndex;
ListBoxRowComponent* const rowComp = getComponentForRow (row);
if (rowComp != nullptr)
{
rowComp->setBounds (0, row * rowHeight, w, rowHeight);
rowComp->update (row, owner.isRowSelected (row));
}
}
}
if (owner.headerComponent != nullptr)
owner.headerComponent->setBounds (owner.outlineThickness + getViewedComponent()->getX(),
owner.outlineThickness,
jmax (owner.getWidth() - owner.outlineThickness * 2,
getViewedComponent()->getWidth()),
owner.headerComponent->getHeight());
}
int getRowNumberOfComponent (Component* const rowComponent) const noexcept
{
const int index = getViewedComponent()->getIndexOfChildComponent (rowComponent);
const int num = rows.size();
for (int i = num; --i >= 0;)
if (((firstIndex + i) % jmax (1, num)) == index)
return firstIndex + i;
return -1;
}
void updateComponents (const bool triggerResize = false)
{
TreeViewContentComponent* const tvc = static_cast <TreeViewContentComponent*> (getViewedComponent());
if (tvc != 0)
{
if (triggerResize)
tvc->resized();
else
tvc->updateComponents();
}
repaint();
}