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// 13 february 2014
package ui
import (
"sync"
)
// A Checkbox is a clickable square with a label. The square can be either checked or unchecked. Checkboxes start out unchecked.
type Checkbox struct {
lock sync.Mutex
created bool
sysData *sysData
initText string
initCheck bool
}
// NewCheckbox creates a new checkbox with the specified text.
func NewCheckbox(text string) (c *Checkbox) {
return &Checkbox{
sysData: mksysdata(c_checkbox),
initText: text,
}
}
// SetText sets the checkbox's text.
func (c *Checkbox) SetText(text string) {
c.lock.Lock()
defer c.lock.Unlock()
if c.created {
c.sysData.setText(text)
return
}
c.initText = text
}
// Text returns the checkbox's text.
func (c *Checkbox) Text() string {
c.lock.Lock()
defer c.lock.Unlock()
if c.created {
return c.sysData.text()
}
return c.initText
}
// SetChecked() changes the checked state of the Checkbox.
func (c *Checkbox) SetChecked(checked bool) {
c.lock.Lock()
defer c.lock.Unlock()
if c.created {
c.sysData.setChecked(checked)
return
}
c.initCheck = checked
}
// Checked() returns whether or not the Checkbox has been checked.
func (c *Checkbox) Checked() bool {
c.lock.Lock()
defer c.lock.Unlock()
if c.created {
return c.sysData.isChecked()
}
return c.initCheck
}
func (c *Checkbox) make(window *sysData) error {
c.lock.Lock()
defer c.lock.Unlock()
err := c.sysData.make(window)
if err != nil {
return err
}
c.sysData.setText(c.initText)
c.sysData.setChecked(c.initCheck)
c.created = true
return nil
}
func (c *Checkbox) allocate(x int, y int, width int, height int, d *sysSizeData) []*allocation {
return []*allocation{&allocation{
x: x,
y: y,
width: width,
height: height,
this: c,
}}
}
func (c *Checkbox) preferredSize(d *sysSizeData) (width int, height int) {
return c.sysData.preferredSize(d)
}
func (c *Checkbox) commitResize(a *allocation, d *sysSizeData) {
c.sysData.commitResize(a, d)
}
func (c *Checkbox) getAuxResizeInfo(d *sysSizeData) {
c.sysData.getAuxResizeInfo(d)
}
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