// 6 april 2015

// This is not an IDL file for the conventional RPC or Microsoft IDLs.
// Instead, this is for a custom IDL of my own creation.
// You can find it at github.com/andlabs/pgidl

package ui {

// TODO autogenerate this somehow
// TODO alternatively, move AFTER typedefs
raw "#ifndef __UI_UI_H__";
raw "#define __UI_UI_H__";

raw "#include <stdint.h>";

// TODO note that should be initialized to zero
struct InitOptions {
	// TODO cbSize

	// If nonzero, allocations will be logged to stderr.
	// See leaks.awk.
	field debugLogAllocations int;

	// This is the menu that the application will use.
	// To give this menu to a uiWindow, specify nonzero for the hasMenubar parameter to uiNewWindow().
	// This value, nor any element of the array it points to, should never change during execution of the program.
	// TODO make it a proper const *const
	// TODO idl2h doesn't support making this even const * yet...
	field Menu *Menu;
};

// TODO const char
raw "const char *uiInit(uiInitOptions *);";
raw "void uiFreeInitError(const char *);";

func Main(void);
func Quit(void);

func FreeText(text *char);

raw "typedef struct uiSizingSys uiSizingSys;";

struct Sizing {
	field xPadding intmax_t;
	field yPadding intmax_t;
	field sys *uiSizingSys;
};

interface Control {
	field Internal *void;		// for use by ui only
	func Destroy(void);
	func Handle(void) uintptr_t;
	func SetParent(p *Parent);
	func PreferredSize(d *Sizing, width *intmax_t, height *intmax_t);
	func Resize(x intmax_t, y intmax_t, width intmax_t, height intmax_t, d *Sizing);
	func Visible(void) int;
	func Show(void);
	func Hide(void);
	func ContainerShow(void);
	func ContainerHide(void);
	func Enable(void);
	func Disable(void);
	func ContainerEnable(void);
	func ContainerDisable(void);
};

interface Parent {
	field Internal *void;
	func Destroy(void);
	// TODO object destruction debug handler
	func Handle(void) uintptr_t;
	func SetMainControl(c *Control);
	func SetMargins(left intmax_t, top intmax_t, right intmax_t, bottom intmax_t);
	// TODO Resize?
	func Update(void);
};
func NewParent(osParent uintptr_t) *Parent;

interface Window {
	field Internal *void;
	func Destroy(void);
	func Handle(void) uintptr_t;
	func Title(void) *char;
	func SetTitle(title *const char);
	func Show(void);
	func Hide(void);
	func OnClosing(f *func(w *Window, data *void) int, data *void);
	func SetChild(c *Control);
	func Margined(void) int;
	func SetMargined(margined int);
};
func NewWindow(title *const char, width int, height int, hasMenubar int) *Window;

interface Button from Control {
	func Text(void) *char;
	func SetText(text *const char);
	func OnClicked(f *func(b *Button, data *void), data *void);
};
func NewButton(text *const char) *Button;

interface Box from Control {
	func Append(c *Control, stretchy int);
	func Delete(index uintmax_t);
	func Padded(void) int;
	func SetPadded(padded int);
};
func NewHorizontalBox(void) *Box;
func NewVerticalBox(void) *Box;

interface Entry from Control {
	func Text(void) *char;
	func SetText(text *const char);
};
func NewEntry(void) *Entry;

interface Checkbox from Control {
	func Text(void) *char;
	func SetText(text *const char);
	func OnToggled(f *func(c *Checkbox, data *void), data *void);
	func Checked(void) int;
	func SetChecked(checked int);
};
func NewCheckbox(text *const char) *Checkbox;

interface Label from Control {
	func Text(void) *char;
	func SetText(text *const char);
};
func NewLabel(text *const char) *Label;

interface Tab from Control {
	// TODO rename to AppendPage()
	func AddPage(name *const char, c *Control);
	func DeletePage(index uintmax_t);
};
func NewTab(void) *Tab;

struct Menu {
	field Name *const char;
	// TODO make a proper const *const
	// TODO idl2h doesn't support making this even const * yet...
	field Items *MenuItem;
};

struct MenuItem {
	field Name *const char;
	field Type MenuItemType;
};

enum MenuItemType {
	Command,
	Checkbox,
	Separator,
};

// TODO allow these to be specified directly in the IDL
/* TODO
raw "extern const char *const uiMenuItemQuit;";
raw "extern const char *const uiMenuItemPreferences;";
raw "extern const char *const uiMenuItemAbout;";
raw "extern const char *const uiMenuItemSeparator;";
*/
raw "#define uiMenuItemQuit ((char *)1)";
raw "#define uiMenuItemPreferences ((char *)2)";
raw "#define uiMenuItemAbout ((char *)3)";
raw "#define uiMenuItemSeparator ((char *)4)";

raw "#endif";

};