1 files changed, 61 insertions, 0 deletions
diff --git a/sysdata.go b/sysdata.go
new file mode 100644
index 0000000..006595c
--- /dev/null
+++ b/sysdata.go
@@ -0,0 +1,61 @@
+// 11 february 2014
+
+package ui
+
+// The sysData type contains all system data. It provides the system-specific underlying implementation. It is guaranteed to have the following by embedding:
+type cSysData struct {
+	ctype     int
+	allocate    func(x int, y int, width int, height int, d *sysSizeData) []*allocation
+	spaced	bool
+	alternate bool        // editable for Combobox, multi-select for listbox, password for lineedit
+	handler   AreaHandler // for Areas; TODO rename to areahandler
+	close	func() bool	// provided by each Window
+	event	func()		// provided by each control
+}
+
+// this interface is used to make sure all sysDatas are synced
+var _xSysData interface {
+	sysDataSizingFunctions
+	make(window *sysData) error
+	firstShow() error
+	show()
+	hide()
+	setText(text string)
+	setRect(x int, y int, width int, height int, winheight int) error
+	isChecked() bool
+	text() string
+	append(string)
+	insertBefore(string, int)
+	selectedIndex() int
+	selectedIndices() []int
+	selectedTexts() []string
+	setWindowSize(int, int) error
+	setProgress(int)
+	len() int
+	setAreaSize(int, int)
+	repaintAll()
+	center()
+	setChecked(bool)
+} = &sysData{} // this line will error if there's an inconsistency
+
+const (
+	c_window = iota
+	c_button
+	c_checkbox
+	c_combobox
+	c_lineedit
+	c_label
+	c_listbox
+	c_progressbar
+	c_area
+	nctypes
+)
+
+func mksysdata(ctype int) *sysData {
+	s := &sysData{
+		cSysData: cSysData{
+			ctype: ctype,
+		},
+	}
+	return s
+}