#include <strings.h>
#include "wm.h"
-tElement gWM_RootElement;
+// === IMPORTS ===
+extern void Decorator_RenderWidget(tElement *Element);
// === PROTOTYPES ===
tElement *WM_CreateElement(tElement *Parent, int Type, int Flags);
+void WM_UpdateMinDims(tElement *Element);
void WM_SetFlags(tElement *Element, int Flags);
void WM_SetSize(tElement *Element, int Size);
void WM_SetText(tElement *Element, char *Text);
+void WM_UpdateDimensions(tElement *Element, int Pass);
+void WM_UpdatePosition(tElement *Element);
+void WM_RenderWidget(tElement *Element);
+void WM_Update(void);
+
+// === GLOBALS ===
+tElement gWM_RootElement;
+struct {
+ void (*Init)(tElement *This);
+ void (*UpdateFlags)(tElement *This);
+ void (*UpdateSize)(tElement *This);
+ void (*UpdateText)(tElement *This);
+} gaWM_WidgetTypes[MAX_ELETYPES] = {
+ {NULL, NULL, NULL, NULL}, // NULL
+ {NULL, NULL, NULL, NULL} // Box
+};
// === CODE ===
+// --- Widget Creation and Control ---
tElement *WM_CreateElement(tElement *Parent, int Type, int Flags)
{
tElement *ret;
- if(Type < 0 || Type >= NUM_ELETYPES) return NULL;
-
ret = calloc(sizeof(tElement), 1);
if(!ret) return NULL;
// Prepare
ret->Type = Type;
+ if(Parent == NULL) Parent = &gWM_RootElement;
ret->Parent = Parent;
+ ret->Flags = Flags;
// Append to parent's list
ret->NextSibling = Parent->LastChild;
Parent->LastChild = ret;
if(!Parent->FirstChild) Parent->FirstChild = ret;
+ ret->PaddingL = 2;
+ ret->PaddingR = 2;
+ ret->PaddingT = 2;
+ ret->PaddingB = 2;
+
+ if( gaWM_WidgetTypes[Type].Init )
+ gaWM_WidgetTypes[Type].Init(ret);
+
+ WM_UpdateMinDims(ret->Parent);
+
return ret;
}
+/**
+ * \brief Alter an element's flags
+ */
void WM_SetFlags(tElement *Element, int Flags)
{
// Permissions are handled in the message handler
void WM_SetSize(tElement *Element, int Size)
{
if(!Element) return ;
- Element->Size = Size;
+ Element->FixedWith = Size;
return ;
}
if(!Element) return ;
if(Element->Text) free(Element->Text);
Element->Text = strdup(Text);
+
+ switch(Element->Type)
+ {
+ case ELETYPE_IMAGE:
+ if(Element->Data) free(Element->Data);
+ Element->Data = Image_Load( Element->Text );
+ if(!Element->Data) {
+ Element->Flags &= ~ELEFLAG_FIXEDSIZE;
+ return ;
+ }
+
+ //Element->Flags |= ELEFLAG_FIXEDSIZE;
+ Element->CachedW = ((tImage*)Element->Data)->Width;
+ Element->CachedH = ((tImage*)Element->Data)->Height;
+
+ if(Element->Parent && Element->Parent->Flags & ELEFLAG_VERTICAL) {
+ Element->MinCross = ((tImage*)Element->Data)->Width;
+ Element->MinWith = ((tImage*)Element->Data)->Height;
+ }
+ else {
+ Element->MinWith = ((tImage*)Element->Data)->Width;
+ Element->MinCross = ((tImage*)Element->Data)->Height;
+ }
+ break;
+ }
+
return ;
}
+
+// --- Pre-Rendering ---
+/**
+ * \brief Updates the dimensions of an element
+ *
+ * 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("%p -> Flags = 0x%x", Element, Element->Flags);
+ _SysDebug("%p ->CachedH = %i, ->PaddingT = %i, ->PaddingB = %i",
+ Element, Element->CachedH, Element->PaddingT, Element->PaddingB
+ );
+ _SysDebug("%p ->CachedW = %i, ->PaddingL = %i, ->PaddingR = %i",
+ Element, Element->CachedW, Element->PaddingL, Element->PaddingR
+ );
+
+ // Pass 1
+ for( child = Element->FirstChild; child; child = child->NextSibling )
+ {
+ if( child->Flags & ELEFLAG_ABSOLUTEPOS )
+ continue ;
+
+ _SysDebug("%p,%p ->FixedWith = %i", Element, child, 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("%p - 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("%p - dynWith = %i", Element, dynWith);
+ }
+
+ if( Element->Flags & ELEFLAG_VERTICAL )
+ fullCross = Element->CachedW - Element->PaddingL - Element->PaddingR;
+ else
+ fullCross = Element->CachedH - Element->PaddingT - Element->PaddingB;
+
+ _SysDebug("%p - fullCross = %i", Element, fullCross);
+
+ // Pass 2 - Set sizes and recurse
+ for( child = Element->FirstChild; child; child = child->NextSibling )
+ {
+ int cross, with;
+
+ _SysDebug("%p,%p ->MinCross = %i", Element, child, 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,%p - cross = %i", Element, child, 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,%p - with = %i", Element, child, with);
+ if( Element->Flags & ELEFLAG_VERTICAL )
+ child->CachedH = with;
+ else
+ child->CachedW = with;
+
+ WM_UpdateDimensions(child, 0);
+ }
+}
+
+/**
+ * \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;
+
+ if( Element->Flags & ELEFLAG_NORENDER ) return ;
+
+ _SysDebug("Element=%p{PaddingL:%i, PaddingT:%i}",
+ Element, Element->PaddingL, Element->PaddingT);
+
+ // Initialise
+ x = Element->CachedX + Element->PaddingL;
+ y = Element->CachedY + Element->PaddingT;
+
+ // Update each child
+ for(child = Element->FirstChild; child; child = child->NextSibling)
+ {
+ child->CachedX = x;
+ child->CachedY = y;
+
+ // Set Alignment
+ if( Element->Flags & ELEFLAG_ALIGN_CENTER ) {
+ 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 ) {
+ if(Element->Flags & ELEFLAG_VERTICAL )
+ child->CachedX += Element->CachedW - child->CachedW;
+ else
+ child->CachedY += Element->CachedH - child->CachedH;
+ }
+
+ // 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("Element %p (%i,%i)",
+ Element, Element->CachedX, Element->CachedY
+ );
+}
+
+
+/**
+ * \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();
+}
git.ucc.asn.au / tpg / acess2.git / blobdiff
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