-
-// --- Pre-Rendering ---
-/**
- * \name Pre-Rendering
- * \brief Updates the element positions and sizes
- * \{
- */
-/**
- * \brief Updates the dimensions of an element
- * \todo What is the \a Pass parameter for
- *
- * The dimensions of an element are calculated from the parent's
- * cross dimension (the side at right angles to the alignment) sans some
- * padding.
- */
-void WM_UpdateDimensions(tElement *Element, int Pass)
-{
- tElement *child;
- int nChildren = 0;
- int nFixed = 0;
- int maxCross = 0;
- int fixedSize = 0;
- int fullCross, dynWith;
-
- _SysDebug("WM_UpdateDimensions %p'%s'", Element, Element->DebugName);
- _SysDebug(" -> Flags = 0x%x", Element->Flags);
- _SysDebug(" ->CachedH = %i, ->PaddingT = %i, ->PaddingB = %i",
- Element->CachedH, Element->PaddingT, Element->PaddingB
- );
- _SysDebug(" ->CachedW = %i, ->PaddingL = %i, ->PaddingR = %i",
- Element->CachedW, Element->PaddingL, Element->PaddingR
- );
-
- // Pass 1
- for( child = Element->FirstChild; child; child = child->NextSibling )
- {
- if( child->Flags & ELEFLAG_ABSOLUTEPOS )
- continue ;
-
- _SysDebug(" > %p'%s' ->FixedWith = %i", child, child->DebugName, child->FixedWith);
- if( child->FixedWith )
- {
- nFixed ++;
- fixedSize += child->FixedWith;
- }
-
- if( child->FixedCross && maxCross < child->FixedCross )
- maxCross = child->FixedCross;
- if( child->MinCross && maxCross < child->MinCross )
- maxCross = child->MinCross;
- nChildren ++;
- }
-
- _SysDebug(" - nChildren = %i, nFixed = %i", Element, nChildren, nFixed);
- if( nChildren > nFixed ) {
- if( Element->Flags & ELEFLAG_VERTICAL )
- dynWith = Element->CachedH - Element->PaddingT
- - Element->PaddingB;
- else
- dynWith = Element->CachedW - Element->PaddingL
- - Element->PaddingR;
- dynWith -= fixedSize;
- if( dynWith < 0 ) return ;
- dynWith /= nChildren - nFixed;
- _SysDebug(" - dynWith = %i", dynWith);
- }
-
- if( Element->Flags & ELEFLAG_VERTICAL )
- fullCross = Element->CachedW - Element->PaddingL - Element->PaddingR;
- else
- fullCross = Element->CachedH - Element->PaddingT - Element->PaddingB;
-
- _SysDebug(" - fullCross = %i", Element, fullCross);
-
- // Pass 2 - Set sizes and recurse
- for( child = Element->FirstChild; child; child = child->NextSibling )
- {
- int cross, with;
-
- _SysDebug(" > %p'%s' ->MinCross = %i", child, child->DebugName, child->MinCross);
-
-
- // --- Cross Size ---
- if( child->FixedCross )
- cross = child->FixedCross;
- // Expand to fill?
- // TODO: Extra flag so options are (Expand, Equal, Wrap)
- else if( child->Flags & ELEFLAG_NOEXPAND )
- cross = child->MinCross;
- else
- cross = fullCross;
- _SysDebug(" > %p'%s' - cross = %i", child, child->DebugName, cross);
- if( Element->Flags & ELEFLAG_VERTICAL )
- child->CachedW = cross;
- else
- child->CachedH = cross;
-
- // --- With Size ---
- if( child->FixedWith)
- with = child->FixedWith;
- else if( child->Flags & ELEFLAG_NOSTRETCH )
- with = child->MinWith;
- else
- with = dynWith;
- _SysDebug(" > %p'%s' - with = %i", child, child->DebugName, with);
- if( Element->Flags & ELEFLAG_VERTICAL )
- child->CachedH = with;
- else
- child->CachedW = with;
-
- WM_UpdateDimensions(child, Pass);
- }
-
- _SysDebug("%p'%s' Done", Element, Element->DebugName);
-}
-
-/**
- * \brief Updates the position of an element
- *
- * The parent element sets the positions of its children
- */
-void WM_UpdatePosition(tElement *Element)
-{
- tElement *child;
- int x, y;
- static int depth = 0;
- char indent[depth+1];
-
- if( Element->Flags & ELEFLAG_NORENDER ) return ;
-
- memset(indent, ' ', depth);
- indent[depth] = '\0';
- depth ++;
-
- _SysDebug("%sWM_UpdatePosition %p'%s'{PaddingL:%i, PaddingT:%i}",
- indent, Element, Element->DebugName, Element->PaddingL, Element->PaddingT);
-
- // Initialise
- x = Element->CachedX + Element->PaddingL;
- y = Element->CachedY + Element->PaddingT;
-
- _SysDebug("%s- Alignment = %s", indent,
- (Element->Flags & ELEFLAG_VERTICAL) ? "vertical" : "horizontal");
-
- // Update each child
- for(child = Element->FirstChild; child; child = child->NextSibling)
- {
- _SysDebug("%s- x = %i, y = %i", indent, x, y);
- child->CachedX = x;
- child->CachedY = y;
-
- // Set Alignment
- if( Element->Flags & ELEFLAG_ALIGN_CENTER ) {
- _SysDebug("%sChild being aligned to center", indent);
- if(Element->Flags & ELEFLAG_VERTICAL)
- child->CachedX += Element->CachedW/2 - child->CachedW/2;
- else
- child->CachedY += Element->CachedH/2 - child->CachedH/2;
- }
- else if( Element->Flags & ELEFLAG_ALIGN_END) {
- _SysDebug("%sChild being aligned to end", indent);
- if(Element->Flags & ELEFLAG_VERTICAL )
- child->CachedX += Element->CachedW
- - Element->PaddingL - Element->PaddingR
- - child->CachedW;
- else
- child->CachedY += Element->CachedH
- - Element->PaddingT
- - Element->PaddingB
- - child->CachedH;
- }
-
- _SysDebug("%s> %p'%s' at (%i,%i)", indent, child, child->DebugName,
- child->CachedX, child->CachedY);
-
- // Update child's children positions
- WM_UpdatePosition(child);
-
- // Increment
- if(Element->Flags & ELEFLAG_VERTICAL ) {
- y += child->CachedH + Element->GapSize;
- }
- else {
- x += child->CachedW + Element->GapSize;
- }
- }
-
- _SysDebug("%sElement %p'%s' (%i,%i)",
- indent, Element, Element->DebugName, Element->CachedX, Element->CachedY
- );
- depth --;
-}
-
-/**
- * \brief Update the minimum dimensions of the element
- * \note Called after a child's minimum dimensions have changed
- */
-void WM_UpdateMinDims(tElement *Element)
-{
- tElement *child;
-
- if(!Element) return;
-
- Element->MinCross = 0;
- Element->MinWith = 0;
-
- for(child = Element->FirstChild; child; child = child->NextSibling)
- {
- if( Element->Parent &&
- (Element->Flags & ELEFLAG_VERTICAL) == (Element->Parent->Flags & ELEFLAG_VERTICAL)
- )
- {
- if(child->FixedCross)
- Element->MinCross += child->FixedCross;
- else
- Element->MinCross += child->MinCross;
- if(child->FixedWith)
- Element->MinWith += child->FixedWith;
- else
- Element->MinWith += child->MinWith;
- }
- else
- {
- if(child->FixedCross)
- Element->MinWith += child->FixedCross;
- else
- Element->MinWith += child->MinCross;
- if(child->FixedWith)
- Element->MinCross += child->FixedWith;
- else
- Element->MinCross += child->MinWith;
- }
- }
-
- // Recurse upwards
- WM_UpdateMinDims(Element->Parent);
-}
-/**
- * \}
- */
-
-// --- Render ---
-void WM_RenderWidget(tElement *Element)
-{
- tElement *child;
-
- if( Element->Flags & ELEFLAG_NORENDER ) return ;
- if( Element->Flags & ELEFLAG_INVISIBLE ) return ;
-
- Decorator_RenderWidget(Element);
-
- for(child = Element->FirstChild; child; child = child->NextSibling)
- {
- WM_RenderWidget(child);
- }
-}
-
-void WM_Update(void)
-{
- gWM_RootElement.CachedX = 0; gWM_RootElement.CachedY = 0;
- gWM_RootElement.CachedW = giScreenWidth;
- gWM_RootElement.CachedH = giScreenHeight;
- gWM_RootElement.Flags |= ELEFLAG_NOEXPAND|ELEFLAG_ABSOLUTEPOS|ELEFLAG_FIXEDSIZE;
-
- WM_UpdateDimensions( &gWM_RootElement, 0 );
- WM_UpdatePosition( &gWM_RootElement );
- WM_RenderWidget( &gWM_RootElement );
-
- Video_Update();
-}