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//
// CompactScrolledWindow.cs
//
// Author:
// Michael Hutchinson <mhutchinson@novell.com>
//
// Copyright (c) 2010 Novell, Inc.
//
// 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 Mono.TextEditor;
namespace MonoDevelop.Components
{
[System.ComponentModel.ToolboxItem (true)]
public class CompactScrolledWindow : Gtk.ScrolledWindow
{
const string styleName = "MonoDevelop.Components.CompactScrolledWindow";
bool showBorderLine;
static CompactScrolledWindow ()
{
Gtk.Rc.ParseString (@"style """ + styleName + @"""
{
GtkScrolledWindow::scrollbar-spacing = 0
}");
}
public CompactScrolledWindow () : base ()
{
//HACK to hide the useless padding that many themes have inside the ScrolledWindow - GTK default is 3
Gtk.Rc.ParseString (string.Format ("widget \"*.{0}\" style \"{1}\" ", Name, styleName));
}
public bool ShowBorderLine {
get {
return showBorderLine;
}
set {
if (showBorderLine == value)
return;
showBorderLine = value;
QueueResize ();
}
}
protected override void OnSizeRequested (ref Gtk.Requisition requisition)
{
base.OnSizeRequested (ref requisition);
//if showing a border line, request a little more space
if (showBorderLine) {
requisition.Height += HScrollbar.Visible? 1 : 2;
requisition.Width += VScrollbar.Visible? 1 : 2;
}
}
protected override void OnSizeAllocated (Gdk.Rectangle allocation)
{
//shrink the allocation we pass to the base layout, to allow for our extra border
if (showBorderLine) {
allocation.X += 1;
allocation.Y += 1;
allocation.Height -= HScrollbar.Visible? 1 : 2;
allocation.Width -= VScrollbar.Visible? 1 : 2;
}
base.OnSizeAllocated (allocation);
//expand the scrollbars so they render over the new border
if (showBorderLine) {
bool hasHScroll = HScrollbar.Visible;
bool hasVScroll = VScrollbar.Visible;
if (hasHScroll) {
var alloc = HScrollbar.Allocation;
alloc.X -= 1;
alloc.Width += hasVScroll? 1 :2;
HScrollbar.SizeAllocate (alloc);
}
if (hasVScroll) {
var alloc = VScrollbar.Allocation;
alloc.Y -= 1;
alloc.Height += hasHScroll? 1 : 2;
VScrollbar.SizeAllocate (alloc);
}
}
}
protected override bool OnExposeEvent (Gdk.EventExpose evnt)
{
var ret = base.OnExposeEvent (evnt);
if (!showBorderLine)
return ret;
bool hasHScroll = HScrollbar.Visible;
bool hasVScroll = VScrollbar.Visible;
//this is the rectangle that defines where we will draw the border lines
//note that Allocation was set by the base, but we altered it during allocation, so take that into account
var rect = Allocation;
var borderWidth = (int) BorderWidth;
rect.X += borderWidth - 1;
rect.Y += borderWidth - 1;
rect.Width -= borderWidth + borderWidth - 2;
rect.Height -= borderWidth + borderWidth - 2;
//if there will be scrollbars, bring the end of the lines to the middle of the scrollbar so it looks nice
if (hasHScroll) {
rect.Height -= HScrollbar.Allocation.Height / 2;
}
if (hasVScroll) {
rect.Width -= VScrollbar.Allocation.Width / 2;
}
double lineWidth = 1;
var halfLineWidth = lineWidth / 2.0;
//draw the border lines
using (var cr = Gdk.CairoHelper.Create (evnt.Window)) {
Gdk.CairoHelper.Region (cr, evnt.Region);
cr.Clip ();
cr.SetSourceColor (Style.Dark (Gtk.StateType.Normal).ToCairoColor ());
cr.LineWidth = lineWidth;
cr.Translate (rect.X, rect.Y);
//top
cr.MoveTo (0, halfLineWidth);
cr.LineTo (rect.Width, halfLineWidth);
//bottom. redundant if there's a horizontal scrollbar.
if (!hasHScroll) {
cr.MoveTo (0, rect.Height - halfLineWidth);
cr.LineTo (rect.Width, rect.Height - halfLineWidth);
}
//left
cr.MoveTo (halfLineWidth, 0);
cr.LineTo (halfLineWidth, rect.Height);
//right. redundant if there's a vertical scrollbar.
if (!hasVScroll) {
cr.MoveTo (rect.Width - halfLineWidth, 0);
cr.LineTo (rect.Width - halfLineWidth, rect.Height);
}
cr.Stroke ();
}
return ret;
}
}
}
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