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//
// DropDownBox.cs
//
// Author:
// Mike Krüger <mkrueger@novell.com>
//
// Copyright (c) 2009 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.ComponentModel;
using Gtk;
using MonoDevelop.Ide;
using Mono.TextEditor;
namespace MonoDevelop.Components
{
[Category ("Widgets")]
[ToolboxItem (true)]
public class DropDownBox : Gtk.Button
{
Pango.Layout layout;
const int pixbufSpacing = 2;
const int leftSpacing = 2;
const int ySpacing = 1;
public string Text {
get {
return layout.Text;
}
set {
layout.SetMarkup (value);
// QueueResize ();
}
}
public DropDownBoxListWindow.IListDataProvider DataProvider {
get;
set;
}
public bool DrawRightBorder {
get;
set;
}
public Gdk.Pixbuf Pixbuf {
get;
set;
}
public object CurrentItem {
get;
set;
}
int defaultIconHeight, defaultIconWidth;
/// <summary>
/// This is so that the height doesn't jump around depending whether there's an icon assigned or not.
/// </summary>
public int DefaultIconHeight {
get { return defaultIconHeight; }
set {
defaultIconHeight = value;
}
}
public int DefaultIconWidth {
get { return defaultIconWidth; }
set {
defaultIconWidth = value;
}
}
public DropDownBox ()
{
layout = new Pango.Layout (this.PangoContext);
this.Events = Gdk.EventMask.KeyPressMask | Gdk.EventMask.FocusChangeMask | Gdk.EventMask.ButtonPressMask | Gdk.EventMask.ButtonReleaseMask | Gdk.EventMask.PointerMotionMask | Gdk.EventMask.LeaveNotifyMask;
this.CanFocus = true;
BorderWidth = 0;
}
void PositionListWindow ()
{
if (window == null)
return;
int ox, oy;
ParentWindow.GetOrigin (out ox, out oy);
int dx = ox + this.Allocation.X;
int dy = oy + this.Allocation.Bottom;
window.WidthRequest = Allocation.Width;
int width, height;
window.GetSizeRequest (out width, out height);
Gdk.Rectangle geometry = DesktopService.GetUsableMonitorGeometry (Screen, Screen.GetMonitorAtPoint (dx, dy));
if (dy + height > geometry.Bottom)
dy = oy + this.Allocation.Y - height;
if (dx + width > geometry.Right)
dx = geometry.Right - width;
window.Move (dx, dy);
window.GetSizeRequest (out width, out height);
window.GrabFocus ();
}
public void SetItem (string text, Gdk.Pixbuf icon, object currentItem)
{
if (currentItem != CurrentItem) {// don't update when the same item is set.
this.Text = text;
this.CurrentItem = currentItem;
this.Pixbuf = icon;
this.QueueDraw ();
}
if (ItemSet != null)
ItemSet (this, EventArgs.Empty);
}
public void SetItem (int i)
{
SetItem (DataProvider.GetMarkup (i), DataProvider.GetIcon (i), DataProvider.GetTag (i));
}
protected override void OnDestroyed ()
{
DestroyWindow ();
if (layout != null) {
layout.Dispose ();
layout = null;
}
base.OnDestroyed ();
}
protected override void OnSizeRequested (ref Requisition requisition)
{
int width, height;
layout.GetPixelSize (out width, out height);
if (Pixbuf != null) {
width += Pixbuf.Width + pixbufSpacing * 2;
height = System.Math.Max (height, Pixbuf.Height);
} else {
height = System.Math.Max (height, defaultIconHeight);
}
if (DrawRightBorder)
width += 2;
int arrowHeight = height / 2;
int arrowWidth = arrowHeight + 1;
requisition.Width = width + arrowWidth + leftSpacing;
requisition.Height = height + ySpacing * 2;
}
protected override bool OnFocusOutEvent (Gdk.EventFocus evnt)
{
DestroyWindow ();
return base.OnFocusOutEvent (evnt);
}
DropDownBoxListWindow window = null;
internal void DestroyWindow ()
{
if (window != null) {
window.Destroy ();
window = null;
QueueDraw ();
}
}
protected override bool OnKeyPressEvent (Gdk.EventKey evnt)
{
if (evnt.Key == Gdk.Key.Escape) {
DestroyWindow ();
return true;
}
if (window != null && window.ProcessKey (evnt.Key, evnt.State))
return true;
return base.OnKeyPressEvent (evnt);
}
protected override bool OnLeaveNotifyEvent (Gdk.EventCrossing evnt)
{
QueueDraw ();
return base.OnLeaveNotifyEvent (evnt);
}
protected override bool OnButtonPressEvent (Gdk.EventButton e)
{
if (e.TriggersContextMenu ()) {
return base.OnButtonPressEvent (e);
}
if (e.Type == Gdk.EventType.ButtonPress) {
if (window != null) {
DestroyWindow ();
} else {
this.GrabFocus ();
if (DataProvider != null) {
DataProvider.Reset ();
if (DataProvider.IconCount > 0) {
window = new DropDownBoxListWindow (DataProvider);
window.list.SelectItem += delegate {
SetItem (window.list.Selection);
};
PositionListWindow ();
window.SelectItem (CurrentItem);
}
}
}
}
return base.OnButtonPressEvent (e);
}
protected override void OnStateChanged (StateType previous_state)
{
base.OnStateChanged (previous_state);
}
protected override bool OnButtonReleaseEvent (Gdk.EventButton e)
{
return base.OnButtonReleaseEvent (e);
}
protected override bool OnMotionNotifyEvent (Gdk.EventMotion e)
{
QueueDraw ();
return base.OnMotionNotifyEvent (e);
}
protected override bool OnExposeEvent (Gdk.EventExpose args)
{
Gdk.Drawable win = args.Window;
int width, height;
layout.GetPixelSize (out width, out height);
int arrowHeight = height / 2;
int arrowWidth = arrowHeight + 1;
int arrowXPos = this.Allocation.X + this.Allocation.Width - arrowWidth;
if (DrawRightBorder)
arrowXPos -= 2;
//HACK: don't ever draw insensitive, only active/prelight/normal, because insensitive generally looks really ugly
//this *might* cause some theme issues with the state of the text/arrows rendering on top of it
var state = window != null? StateType.Active
: State == StateType.Insensitive? StateType.Normal : State;
//HACK: paint the button background as if it were bigger, but it stays clipped to the real area,
// so we get the content but not the border. This might break with crazy themes.
//FIXME: we can't use the style's actual internal padding because GTK# hasn't wrapped GtkBorder AFAICT
// (default-border, inner-border, default-outside-border, etc - see http://git.gnome.org/browse/gtk+/tree/gtk/gtkbutton.c)
const int padding = 4;
Style.PaintBox (Style, args.Window, state, ShadowType.None, args.Area, this, "button",
Allocation.X - padding, Allocation.Y - padding, Allocation.Width + padding * 2, Allocation.Height + padding * 2);
int xPos = Allocation.Left;
if (Pixbuf != null) {
win.DrawPixbuf (this.Style.BaseGC (StateType.Normal), Pixbuf, 0, 0, xPos + pixbufSpacing, Allocation.Y + (Allocation.Height - Pixbuf.Height) / 2, Pixbuf.Width, Pixbuf.Height, Gdk.RgbDither.None, 0, 0);
xPos += Pixbuf.Width + pixbufSpacing * 2;
}
//constrain the text area so it doesn't get rendered under the arrows
var textArea = new Gdk.Rectangle (xPos, Allocation.Y + ySpacing, arrowXPos - xPos - 2, Allocation.Height - ySpacing);
Style.PaintLayout (Style, win, state, true, textArea, this, "", textArea.X, textArea.Y, layout);
state = Sensitive ? StateType.Normal : StateType.Insensitive;
Gtk.Style.PaintArrow (this.Style, win, state, ShadowType.None, args.Area, this, "", ArrowType.Up, true, arrowXPos, Allocation.Y + (Allocation.Height) / 2 - arrowHeight, arrowWidth, arrowHeight);
Gtk.Style.PaintArrow (this.Style, win, state, ShadowType.None, args.Area, this, "", ArrowType.Down, true, arrowXPos, Allocation.Y + (Allocation.Height) / 2, arrowWidth, arrowHeight);
if (DrawRightBorder)
win.DrawLine (this.Style.DarkGC (StateType.Normal), Allocation.X + Allocation.Width - 1, Allocation.Y, Allocation.X + Allocation.Width - 1, Allocation.Y + Allocation.Height);
return false;
}
public EventHandler ItemSet;
}
}
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