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Allow dropdowns to have scrolling panels closes #8

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Ell 2023-08-14 17:50:07 +02:00
parent f6bc206c1f
commit 237334b1c9
2 changed files with 13 additions and 3 deletions
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1
CHANGELOG.md
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@ -25,6 +25,7 @@ Fixes
### MLEM.Ui
Improvements
- Allow scrolling panels to contain other scrolling panels
- Allow dropdowns to have scrolling panels (#8)
## 6.2.0

15
MLEM.Ui/Elements/Dropdown.cs
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@ -36,12 +36,15 @@ namespace MLEM.Ui.Elements {
/// <param name="size">The dropdown button's size</param>
/// <param name="text">The text displayed on the dropdown button</param>
/// <param name="tooltipText">The text displayed as a tooltip when hovering over the dropdown button</param>
public Dropdown(Anchor anchor, Vector2 size, string text = null, string tooltipText = null) : base(anchor, size, text, tooltipText) {
this.Panel = this.AddChild(new Panel(Anchor.TopCenter, Vector2.Zero, Vector2.Zero, true) {
/// <param name="panelHeight">The height of the <see cref="Panel"/>. If this is 0, the panel will be set to <see cref="Element.SetHeightBasedOnChildren"/>.</param>
/// <param name="scrollPanel">Whether this dropdown's <see cref="Panel"/> should automatically add a scroll bar to scroll towards elements that are beyond the area it covers.</param>
/// <param name="autoHidePanelScrollbar">Whether this dropdown's <see cref="Panel"/>'s scroll bar should be hidden automatically if the panel does not contain enough children to allow for scrolling. This only has an effect if <paramref name="scrollPanel"/> is <see langword="true"/>.</param>
public Dropdown(Anchor anchor, Vector2 size, string text = null, string tooltipText = null, float panelHeight = 0, bool scrollPanel = false, bool autoHidePanelScrollbar = true) : base(anchor, size, text, tooltipText) {
this.Panel = this.AddChild(new Panel(Anchor.TopCenter, Vector2.Zero, Vector2.Zero, panelHeight == 0, scrollPanel, autoHidePanelScrollbar) {
IsHidden = true
});
this.OnAreaUpdated += e => {
this.Panel.Size = new Vector2(e.Area.Width / e.Scale, 0);
this.Panel.Size = new Vector2(e.Area.Width / e.Scale, panelHeight);
this.Panel.PositionOffset = new Vector2(0, e.Area.Height / e.Scale);
};
this.OnOpenedOrClosed += e => this.Priority = this.IsOpen ? 10000 : 0;
@ -63,6 +66,12 @@ namespace MLEM.Ui.Elements {
};
}
/// <inheritdoc />
protected override void OnChildAreaDirty(Element child, bool grandchild) {
if (child != this.Panel)
base.OnChildAreaDirty(child, grandchild);
}
/// <summary>
/// Adds an element to this dropdown's <see cref="Panel"/>
/// </summary>