/* Title: Tools/jEdit/src/info_dockable.scala
Author: Makarius
Dockable window with info text.
*/
package isabelle.jedit
import isabelle._
import scala.actors.Actor._
import scala.swing.{FlowPanel, Button, CheckBox}
import scala.swing.event.ButtonClicked
import java.lang.System
import java.awt.BorderLayout
import java.awt.event.{ComponentEvent, ComponentAdapter, WindowFocusListener, WindowEvent}
import org.gjt.sp.jedit.View
object Info_Dockable
{
/* implicit arguments -- owned by Swing thread */
private var implicit_snapshot = Document.State.init.snapshot()
private var implicit_info: XML.Body = Nil
private def set_implicit(snapshot: Document.Snapshot, info: XML.Body)
{
Swing_Thread.require()
implicit_snapshot = snapshot
implicit_info = info
}
private def reset_implicit(): Unit = set_implicit(Document.State.init.snapshot(), Nil)
def apply(view: View, snapshot: Document.Snapshot, info: XML.Body)
{
set_implicit(snapshot, info)
view.getDockableWindowManager.floatDockableWindow("isabelle-info")
}
}
class Info_Dockable(view: View, position: String) extends Dockable(view, position)
{
Swing_Thread.require()
/* component state -- owned by Swing thread */
private var zoom_factor = 100
private val snapshot = Info_Dockable.implicit_snapshot
private val info = Info_Dockable.implicit_info
private val window_focus_listener =
new WindowFocusListener {
def windowGainedFocus(e: WindowEvent) { Info_Dockable.set_implicit(snapshot, info) }
def windowLostFocus(e: WindowEvent) { Info_Dockable.reset_implicit() }
}
/* pretty text area */
private val pretty_text_area = new Pretty_Text_Area(view)
set_content(pretty_text_area)
pretty_text_area.update(snapshot, info)
private def handle_resize()
{
Swing_Thread.require()
pretty_text_area.resize(Isabelle.font_family(),
(Isabelle.font_size("jedit_font_scale") * zoom_factor / 100).round)
}
/* main actor */
private val main_actor = actor {
loop {
react {
case _: Session.Global_Options =>
Swing_Thread.later { handle_resize() }
case bad => System.err.println("Info_Dockable: ignoring bad message " + bad)
}
}
}
override def init()
{
Swing_Thread.require()
JEdit_Lib.parent_window(this).map(_.addWindowFocusListener(window_focus_listener))
Isabelle.session.global_options += main_actor
handle_resize()
}
override def exit()
{
Swing_Thread.require()
JEdit_Lib.parent_window(this).map(_.removeWindowFocusListener(window_focus_listener))
Isabelle.session.global_options -= main_actor
delay_resize.revoke()
}
/* resize */
private val delay_resize =
Swing_Thread.delay_first(
Time.seconds(Isabelle.options.real("editor_update_delay"))) { handle_resize() }
addComponentListener(new ComponentAdapter {
override def componentResized(e: ComponentEvent) { delay_resize.invoke() }
})
/* controls */
private val zoom = new Library.Zoom_Box(factor => { zoom_factor = factor; handle_resize() })
zoom.tooltip = "Zoom factor for basic font size"
private val controls = new FlowPanel(FlowPanel.Alignment.Right)(zoom)
add(controls.peer, BorderLayout.NORTH)
}