#pragma once

#include "alf.h"
#include "alflist.h"

typedef struct {
    ALFListHeader list;
    HWND hwnd;
    int x;
    int y;
    int width;
    int height;
    DWORD flags;
} ALFWidgetPriv;

typedef struct {
    HWND hwnd;
    int x;
    int y;
    int width;
    int height;
    DWORD flags;
} ALFAddWidgetParams;

typedef struct {
    // properties set by user
    int requestedMinWidth;
    int requestedExpandNumerator;
    DWORD requestedFlags;

    // calculated properties
    int calculatedMinWidth;
    int calculatedExpandNumerator;

    // allocated size for layout application
    int allocatedWidth;
    int allocatedPosition;
} ALFLayoutRowOrColumn;

#define ALF_LAYOUT_NEED_RECALC   ((DWORD)1)
#define ALF_LAYOUT_NEED_REAPPLY  ((DWORD)2)

typedef struct {
    ALFListHeader         widgets;
    ALFLayoutRowOrColumn *columns;
    ALFLayoutRowOrColumn *rows;
    int                   nColumns;
    int                   nRows;
    int                   totalMinWidth;
    int                   totalMinHeight;
    int                   columnExpandDenominator;
    int                   rowExpandDenominator;
    int                   biggestColumnNo;
    int                   biggestRowNo;
    DWORD                 layoutValididityFlags;
    int                   dpi;
} ALFLayout;

void
ALF_Layout_Init(ALFLayout *layout);

void
ALF_Layout_Clear(ALFLayout *layout);

void
ALF_Layout_GetMinSize(ALFLayout *layout, HWND window, SIZE *size);

void
ALF_Layout_Apply(ALFLayout *layout, HWND window);

void
ALF_Layout_AddWidget(ALFLayout *layout, HWND window, const ALFAddWidgetParams *params);

BOOL
ALF_Layout_RemoveWidget(ALFLayout *layout, HWND window, HWND widget, BOOL destroy);

BOOL
ALF_Layout_HandleMessage(ALFLayout *layout, HWND window, UINT msg, WPARAM wparam, LPARAM lparam, LRESULT *ret);

HWND
ALF_Layout_WidgetAtPos(ALFLayout *layout, int x, int y);

void
ALF_Layout_Invalidate(ALFLayout *layout, HWND window);

BOOL
ALF_Layout_Validate(ALFLayout *layout, HWND window);