446 lines
12 KiB
C#
446 lines
12 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007-2015 The OpenRA Developers (see AUTHORS)
|
|
* This file is part of OpenRA, which is free software. It is made
|
|
* available to you under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation. For more information,
|
|
* see COPYING.
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Drawing;
|
|
using System.Linq;
|
|
using OpenRA.Graphics;
|
|
using OpenRA.Primitives;
|
|
using OpenRA.Widgets;
|
|
|
|
namespace OpenRA.Mods.Common.Widgets
|
|
{
|
|
public interface ILayout
|
|
{
|
|
void AdjustChild(Widget w);
|
|
void AdjustChildren();
|
|
}
|
|
|
|
public enum ScrollPanelAlign
|
|
{
|
|
Bottom,
|
|
Top
|
|
}
|
|
|
|
public class ScrollPanelWidget : Widget
|
|
{
|
|
readonly Ruleset modRules;
|
|
public int ScrollbarWidth = 24;
|
|
public int ItemSpacing = 2;
|
|
public int ButtonDepth = ChromeMetrics.Get<int>("ButtonDepth");
|
|
public string Background = "scrollpanel-bg";
|
|
public string Button = "scrollpanel-button";
|
|
public int ContentHeight;
|
|
public ILayout Layout;
|
|
public int MinimumThumbSize = 10;
|
|
public ScrollPanelAlign Align = ScrollPanelAlign.Top;
|
|
public bool CollapseHiddenChildren;
|
|
public float SmoothScrollSpeed = 0.333f;
|
|
|
|
protected bool upPressed;
|
|
protected bool downPressed;
|
|
protected bool upDisabled;
|
|
protected bool downDisabled;
|
|
protected bool thumbPressed;
|
|
protected Rectangle upButtonRect;
|
|
protected Rectangle downButtonRect;
|
|
protected Rectangle backgroundRect;
|
|
protected Rectangle scrollbarRect;
|
|
protected Rectangle thumbRect;
|
|
|
|
// The target value is the list offset we're trying to reach
|
|
float targetListOffset;
|
|
|
|
// The current value is the actual list offset at the moment
|
|
float currentListOffset;
|
|
|
|
// Setting "smooth" to true will only update the target list offset.
|
|
// Setting "smooth" to false will also set the current list offset,
|
|
// i.e. it will scroll immediately.
|
|
//
|
|
// For example, scrolling with the mouse wheel will use smooth
|
|
// scrolling to give a nice visual effect that makes it easier
|
|
// for the user to follow. Dragging the scrollbar's thumb, however,
|
|
// will scroll to the desired position immediately.
|
|
protected void SetListOffset(float value, bool smooth)
|
|
{
|
|
targetListOffset = value;
|
|
if (!smooth)
|
|
{
|
|
var oldListOffset = currentListOffset;
|
|
currentListOffset = value;
|
|
|
|
// Update mouseover
|
|
if (oldListOffset != currentListOffset)
|
|
{
|
|
var mi = new MouseInput(MouseInputEvent.Move, MouseButton.None, 0, Viewport.LastMousePos, Modifiers.None, 0);
|
|
Ui.HandleInput(mi);
|
|
}
|
|
}
|
|
}
|
|
|
|
[ObjectCreator.UseCtor]
|
|
public ScrollPanelWidget(Ruleset modRules)
|
|
{
|
|
this.modRules = modRules;
|
|
|
|
Layout = new ListLayout(this);
|
|
}
|
|
|
|
public override void RemoveChildren()
|
|
{
|
|
ContentHeight = 0;
|
|
base.RemoveChildren();
|
|
}
|
|
|
|
public override void AddChild(Widget child)
|
|
{
|
|
// Initial setup of margins/height
|
|
Layout.AdjustChild(child);
|
|
base.AddChild(child);
|
|
}
|
|
|
|
public override void RemoveChild(Widget child)
|
|
{
|
|
base.RemoveChild(child);
|
|
Layout.AdjustChildren();
|
|
Scroll(0);
|
|
}
|
|
|
|
public void ReplaceChild(Widget oldChild, Widget newChild)
|
|
{
|
|
oldChild.Removed();
|
|
newChild.Parent = this;
|
|
Children[Children.IndexOf(oldChild)] = newChild;
|
|
Layout.AdjustChildren();
|
|
Scroll(0);
|
|
}
|
|
|
|
public override void DrawOuter()
|
|
{
|
|
if (!IsVisible())
|
|
return;
|
|
|
|
var rb = RenderBounds;
|
|
|
|
var scrollbarHeight = rb.Height - 2 * ScrollbarWidth;
|
|
|
|
var thumbHeight = ContentHeight == 0 ? 0 : Math.Max(MinimumThumbSize, (int)(scrollbarHeight * Math.Min(rb.Height * 1f / ContentHeight, 1f)));
|
|
var thumbOrigin = rb.Y + ScrollbarWidth + (int)((scrollbarHeight - thumbHeight) * (-1f * currentListOffset / (ContentHeight - rb.Height)));
|
|
if (thumbHeight == scrollbarHeight)
|
|
thumbHeight = 0;
|
|
|
|
backgroundRect = new Rectangle(rb.X, rb.Y, rb.Width - ScrollbarWidth + 1, rb.Height);
|
|
upButtonRect = new Rectangle(rb.Right - ScrollbarWidth, rb.Y, ScrollbarWidth, ScrollbarWidth);
|
|
downButtonRect = new Rectangle(rb.Right - ScrollbarWidth, rb.Bottom - ScrollbarWidth, ScrollbarWidth, ScrollbarWidth);
|
|
scrollbarRect = new Rectangle(rb.Right - ScrollbarWidth, rb.Y + ScrollbarWidth - 1, ScrollbarWidth, scrollbarHeight + 2);
|
|
thumbRect = new Rectangle(rb.Right - ScrollbarWidth, thumbOrigin, ScrollbarWidth, thumbHeight);
|
|
|
|
var upHover = Ui.MouseOverWidget == this && upButtonRect.Contains(Viewport.LastMousePos);
|
|
upDisabled = thumbHeight == 0 || currentListOffset >= 0;
|
|
|
|
var downHover = Ui.MouseOverWidget == this && downButtonRect.Contains(Viewport.LastMousePos);
|
|
downDisabled = thumbHeight == 0 || currentListOffset <= Bounds.Height - ContentHeight;
|
|
|
|
var thumbHover = Ui.MouseOverWidget == this && thumbRect.Contains(Viewport.LastMousePos);
|
|
WidgetUtils.DrawPanel(Background, backgroundRect);
|
|
WidgetUtils.DrawPanel(Background, scrollbarRect);
|
|
ButtonWidget.DrawBackground(Button, upButtonRect, upDisabled, upPressed, upHover, false);
|
|
ButtonWidget.DrawBackground(Button, downButtonRect, downDisabled, downPressed, downHover, false);
|
|
|
|
if (thumbHeight > 0)
|
|
ButtonWidget.DrawBackground(Button, thumbRect, false, HasMouseFocus && thumbHover, thumbHover, false);
|
|
|
|
var upOffset = !upPressed || upDisabled ? 4 : 4 + ButtonDepth;
|
|
var downOffset = !downPressed || downDisabled ? 4 : 4 + ButtonDepth;
|
|
|
|
WidgetUtils.DrawRGBA(ChromeProvider.GetImage("scrollbar", upPressed || upDisabled ? "up_pressed" : "up_arrow"),
|
|
new float2(upButtonRect.Left + upOffset, upButtonRect.Top + upOffset));
|
|
WidgetUtils.DrawRGBA(ChromeProvider.GetImage("scrollbar", downPressed || downDisabled ? "down_pressed" : "down_arrow"),
|
|
new float2(downButtonRect.Left + downOffset, downButtonRect.Top + downOffset));
|
|
|
|
var drawBounds = backgroundRect.InflateBy(-1, -1, -1, -1);
|
|
Game.Renderer.EnableScissor(drawBounds);
|
|
|
|
drawBounds.Offset((-ChildOrigin).ToPoint());
|
|
foreach (var child in Children)
|
|
if (child.Bounds.IntersectsWith(drawBounds))
|
|
child.DrawOuter();
|
|
|
|
Game.Renderer.DisableScissor();
|
|
}
|
|
|
|
public override int2 ChildOrigin { get { return RenderOrigin + new int2(0, (int)currentListOffset); } }
|
|
|
|
public override Rectangle GetEventBounds()
|
|
{
|
|
return EventBounds;
|
|
}
|
|
|
|
void Scroll(int amount, bool smooth = false)
|
|
{
|
|
var newTarget = targetListOffset + amount * Game.Settings.Game.UIScrollSpeed;
|
|
newTarget = Math.Min(0, Math.Max(Bounds.Height - ContentHeight, newTarget));
|
|
|
|
SetListOffset(newTarget, smooth);
|
|
}
|
|
|
|
public void ScrollToBottom(bool smooth = false)
|
|
{
|
|
var value = Align == ScrollPanelAlign.Top ?
|
|
Math.Min(0, Bounds.Height - ContentHeight) :
|
|
Bounds.Height - ContentHeight;
|
|
|
|
SetListOffset(value, smooth);
|
|
}
|
|
|
|
public void ScrollToTop(bool smooth = false)
|
|
{
|
|
var value = Align == ScrollPanelAlign.Top ? 0 :
|
|
Math.Max(0, Bounds.Height - ContentHeight);
|
|
|
|
SetListOffset(value, smooth);
|
|
}
|
|
|
|
public bool ScrolledToBottom
|
|
{
|
|
get { return targetListOffset == Math.Min(0, Bounds.Height - ContentHeight) || ContentHeight <= Bounds.Height; }
|
|
}
|
|
|
|
void ScrollToItem(Widget item, bool smooth = false)
|
|
{
|
|
// Scroll the item to be visible
|
|
float? newOffset = null;
|
|
if (item.Bounds.Top + currentListOffset < 0)
|
|
newOffset = ItemSpacing - item.Bounds.Top;
|
|
|
|
if (item.Bounds.Bottom + currentListOffset > RenderBounds.Height)
|
|
newOffset = RenderBounds.Height - item.Bounds.Bottom - ItemSpacing;
|
|
|
|
if (newOffset.HasValue)
|
|
SetListOffset(newOffset.Value, smooth);
|
|
}
|
|
|
|
public void ScrollToItem(string itemKey, bool smooth = false)
|
|
{
|
|
var item = Children.FirstOrDefault(c =>
|
|
{
|
|
var si = c as ScrollItemWidget;
|
|
return si != null && si.ItemKey == itemKey;
|
|
});
|
|
|
|
if (item != null)
|
|
ScrollToItem(item, smooth);
|
|
}
|
|
|
|
public void ScrollToSelectedItem()
|
|
{
|
|
var item = Children.FirstOrDefault(c =>
|
|
{
|
|
var si = c as ScrollItemWidget;
|
|
return si != null && si.IsSelected();
|
|
});
|
|
|
|
if (item != null)
|
|
ScrollToItem(item);
|
|
}
|
|
|
|
public override void Tick()
|
|
{
|
|
if (upPressed)
|
|
Scroll(1);
|
|
|
|
if (downPressed)
|
|
Scroll(-1);
|
|
|
|
var offsetDiff = targetListOffset - currentListOffset;
|
|
var absOffsetDiff = Math.Abs(offsetDiff);
|
|
if (absOffsetDiff > 1f)
|
|
{
|
|
currentListOffset += offsetDiff * SmoothScrollSpeed.Clamp(0.1f, 1.0f);
|
|
|
|
// Update mouseover
|
|
var mi = new MouseInput(MouseInputEvent.Move, MouseButton.None, 0, Viewport.LastMousePos, Modifiers.None, 0);
|
|
Ui.HandleInput(mi);
|
|
}
|
|
else
|
|
SetListOffset(targetListOffset, false);
|
|
}
|
|
|
|
public override bool YieldMouseFocus(MouseInput mi)
|
|
{
|
|
upPressed = downPressed = thumbPressed = false;
|
|
return base.YieldMouseFocus(mi);
|
|
}
|
|
|
|
int2 lastMouseLocation;
|
|
|
|
public override bool HandleMouseInput(MouseInput mi)
|
|
{
|
|
if (mi.Event == MouseInputEvent.Scroll)
|
|
{
|
|
Scroll(mi.ScrollDelta, true);
|
|
return true;
|
|
}
|
|
|
|
if (mi.Button != MouseButton.Left)
|
|
return false;
|
|
|
|
if (mi.Event == MouseInputEvent.Down && !TakeMouseFocus(mi))
|
|
return false;
|
|
|
|
if (!HasMouseFocus)
|
|
return false;
|
|
|
|
if (HasMouseFocus && mi.Event == MouseInputEvent.Up)
|
|
return YieldMouseFocus(mi);
|
|
|
|
if (thumbPressed && mi.Event == MouseInputEvent.Move)
|
|
{
|
|
var rb = RenderBounds;
|
|
var scrollbarHeight = rb.Height - 2 * ScrollbarWidth;
|
|
var thumbHeight = ContentHeight == 0 ? 0 : Math.Max(MinimumThumbSize, (int)(scrollbarHeight * Math.Min(rb.Height * 1f / ContentHeight, 1f)));
|
|
var oldOffset = currentListOffset;
|
|
|
|
var newOffset = currentListOffset + ((int)((lastMouseLocation.Y - mi.Location.Y) * (ContentHeight - rb.Height) * 1f / (scrollbarHeight - thumbHeight)));
|
|
newOffset = Math.Min(0, Math.Max(rb.Height - ContentHeight, newOffset));
|
|
SetListOffset(newOffset, false);
|
|
|
|
if (oldOffset != newOffset)
|
|
lastMouseLocation = mi.Location;
|
|
}
|
|
else
|
|
{
|
|
upPressed = upButtonRect.Contains(mi.Location);
|
|
downPressed = downButtonRect.Contains(mi.Location);
|
|
thumbPressed = thumbRect.Contains(mi.Location);
|
|
if (thumbPressed)
|
|
lastMouseLocation = mi.Location;
|
|
|
|
if (mi.Event == MouseInputEvent.Down && ((upPressed && !upDisabled) || (downPressed && !downDisabled) || thumbPressed))
|
|
Sound.PlayNotification(modRules, null, "Sounds", "ClickSound", null);
|
|
}
|
|
|
|
return upPressed || downPressed || thumbPressed;
|
|
}
|
|
|
|
IObservableCollection collection;
|
|
Func<object, Widget> makeWidget;
|
|
Func<Widget, object, bool> widgetItemEquals;
|
|
bool autoScroll;
|
|
|
|
public void Unbind()
|
|
{
|
|
Bind(null, null, null, false);
|
|
}
|
|
|
|
public void Bind(IObservableCollection c, Func<object, Widget> makeWidget, Func<Widget, object, bool> widgetItemEquals, bool autoScroll)
|
|
{
|
|
this.autoScroll = autoScroll;
|
|
|
|
Game.RunAfterTick(() =>
|
|
{
|
|
if (collection != null)
|
|
{
|
|
collection.OnAdd -= BindingAdd;
|
|
collection.OnRemove -= BindingRemove;
|
|
collection.OnRemoveAt -= BindingRemoveAt;
|
|
collection.OnSet -= BindingSet;
|
|
collection.OnRefresh -= BindingRefresh;
|
|
}
|
|
|
|
this.makeWidget = makeWidget;
|
|
this.widgetItemEquals = widgetItemEquals;
|
|
|
|
RemoveChildren();
|
|
collection = c;
|
|
|
|
if (c != null)
|
|
{
|
|
foreach (var item in c.ObservedItems)
|
|
BindingAddImpl(item);
|
|
|
|
c.OnAdd += BindingAdd;
|
|
c.OnRemove += BindingRemove;
|
|
c.OnRemoveAt += BindingRemoveAt;
|
|
c.OnSet += BindingSet;
|
|
c.OnRefresh += BindingRefresh;
|
|
}
|
|
});
|
|
}
|
|
|
|
void BindingAdd(object item)
|
|
{
|
|
Game.RunAfterTick(() => BindingAddImpl(item));
|
|
}
|
|
|
|
void BindingAddImpl(object item)
|
|
{
|
|
var widget = makeWidget(item);
|
|
var scrollToBottom = autoScroll && ScrolledToBottom;
|
|
|
|
AddChild(widget);
|
|
|
|
if (scrollToBottom)
|
|
ScrollToBottom();
|
|
}
|
|
|
|
void BindingRemove(object item)
|
|
{
|
|
Game.RunAfterTick(() =>
|
|
{
|
|
var widget = Children.FirstOrDefault(w => widgetItemEquals(w, item));
|
|
if (widget != null)
|
|
RemoveChild(widget);
|
|
});
|
|
}
|
|
|
|
void BindingRemoveAt(int index)
|
|
{
|
|
Game.RunAfterTick(() =>
|
|
{
|
|
if (index < 0 || index >= Children.Count)
|
|
return;
|
|
RemoveChild(Children[index]);
|
|
});
|
|
}
|
|
|
|
void BindingSet(object oldItem, object newItem)
|
|
{
|
|
Game.RunAfterTick(() =>
|
|
{
|
|
var newWidget = makeWidget(newItem);
|
|
newWidget.Parent = this;
|
|
|
|
var i = Children.FindIndex(w => widgetItemEquals(w, oldItem));
|
|
if (i >= 0)
|
|
{
|
|
var oldWidget = Children[i];
|
|
oldWidget.Removed();
|
|
Children[i] = newWidget;
|
|
Layout.AdjustChildren();
|
|
}
|
|
else
|
|
AddChild(newWidget);
|
|
});
|
|
}
|
|
|
|
void BindingRefresh()
|
|
{
|
|
Game.RunAfterTick(() =>
|
|
{
|
|
RemoveChildren();
|
|
foreach (var item in collection.ObservedItems)
|
|
BindingAddImpl(item);
|
|
});
|
|
}
|
|
}
|
|
}
|