/// <summary>
/// Find the panel responsible for this object.
/// </summary>
void FindPanel()
{
mPanel = (target != null) ? NGUIPanel.Find(target.transform, false) : null;
if (mPanel == null)
{
restrictWithinPanel = false;
}
}
/// <summary>
/// Ensure we have a panel referencing this widget.
/// </summary>
public void CreatePanel()
{
if (mPanel == null && enabled && NGUITools.GetActive(gameObject) && material != null)
{
mPanel = NGUIPanel.Find(cachedTransform);
if (mPanel != null)
{
CheckLayer();
mPanel.AddWidget(this);
mChanged = true;
}
}
}
/// <summary>
/// Display the drop-down list when the game object gets clicked on.
/// </summary>
void OnClick()
{
if (mChild == null && atlas != null && font != null && items.Count > 0)
{
mLabelList.Clear();
// Disable the navigation script
handleEvents = true;
// Automatically locate the panel responsible for this object
if (mPanel == null)
{
mPanel = NGUIPanel.Find(transform, true);
}
// Calculate the dimensions of the object triggering the popup list so we can position it below it
Transform myTrans = transform;
Bounds bounds = NGUIMath.CalculateRelativeWidgetBounds(myTrans.parent, myTrans);
// Create the root object for the list
mChild = new GameObject("Drop-down List");
mChild.layer = gameObject.layer;
Transform t = mChild.transform;
t.parent = myTrans.parent;
t.localPosition = bounds.min;
t.localRotation = Quaternion.identity;
t.localScale = Vector3.one;
// Add a sprite for the background
mBackground = NGUITools.AddSprite(mChild, atlas, backgroundSprite);
mBackground.pivot = NGUIWidget.Pivot.TopLeft;
mBackground.depth = NGUITools.CalculateNextDepth(mPanel.gameObject);
mBackground.color = backgroundColor;
// We need to know the size of the background sprite for padding purposes
Vector4 bgPadding = mBackground.border;
mBgBorder = bgPadding.y;
mBackground.cachedTransform.localPosition = new Vector3(0f, bgPadding.y, 0f);
// Add a sprite used for the selection
mHighlight = NGUITools.AddSprite(mChild, atlas, highlightSprite);
mHighlight.pivot = NGUIWidget.Pivot.TopLeft;
mHighlight.color = highlightColor;
NGUIAtlas.Sprite hlsp = mHighlight.GetAtlasSprite();
if (hlsp == null)
{
return;
}
float hlspHeight = hlsp.inner.yMin - hlsp.outer.yMin;
float fontScale = font.size * font.pixelSize * textScale;
float x = 0f, y = -padding.y;
List <NGUILabel> labels = new List <NGUILabel>();
// Run through all items and create labels for each one
for (int i = 0, imax = items.Count; i < imax; ++i)
{
string s = items[i];
NGUILabel lbl = NGUITools.AddWidget <NGUILabel>(mChild);
lbl.pivot = NGUIWidget.Pivot.TopLeft;
lbl.font = font;
lbl.text = (isLocalized && Localization.instance != null) ? Localization.instance.Get(s) : s;
lbl.color = textColor;
lbl.cachedTransform.localPosition = new Vector3(bgPadding.x + padding.x, y, -0.01f);
lbl.MakePixelPerfect();
if (textScale != 1f)
{
Vector3 scale = lbl.cachedTransform.localScale;
lbl.cachedTransform.localScale = scale * textScale;
}
labels.Add(lbl);
y -= fontScale;
y -= padding.y;
x = Mathf.Max(x, lbl.relativeSize.x * fontScale);
// Add an event listener
NGUIEventListener listener = NGUIEventListener.Get(lbl.gameObject);
listener.onHover = OnItemHover;
listener.onPress = OnItemPress;
listener.parameter = s;
// Move the selection here if this is the right label
if (mSelectedItem == s)
{
Highlight(lbl, true);
}
// Add this label to the list
mLabelList.Add(lbl);
}
// The triggering widget's width should be the minimum allowed width
x = Mathf.Max(x, bounds.size.x - (bgPadding.x + padding.x) * 2f);
Vector3 bcCenter = new Vector3((x * 0.5f) / fontScale, -0.5f, 0f);
Vector3 bcSize = new Vector3(x / fontScale, (fontScale + padding.y) / fontScale, 1f);
// Run through all labels and add colliders
for (int i = 0, imax = labels.Count; i < imax; ++i)
{
NGUILabel lbl = labels[i];
BoxCollider bc = NGUITools.AddWidgetCollider(lbl.gameObject);
bcCenter.z = bc.center.z;
bc.center = bcCenter;
bc.size = bcSize;
}
x += (bgPadding.x + padding.x) * 2f;
y -= bgPadding.y;
// Scale the background sprite to envelop the entire set of items
mBackground.cachedTransform.localScale = new Vector3(x, -y + bgPadding.y, 1f);
// Scale the highlight sprite to envelop a single item
mHighlight.cachedTransform.localScale = new Vector3(
x - (bgPadding.x + padding.x) * 2f + (hlsp.inner.xMin - hlsp.outer.xMin) * 2f,
fontScale + hlspHeight * 2f, 1f);
bool placeAbove = (position == Position.Above);
if (position == Position.Auto)
{
NGUICamera cam = NGUICamera.FindCameraForLayer(gameObject.layer);
if (cam != null)
{
Vector3 viewPos = cam.cachedCamera.WorldToViewportPoint(myTrans.position);
placeAbove = (viewPos.y < 0.5f);
}
}
// If the list should be animated, let's animate it by expanding it
if (isAnimated)
{
float bottom = y + fontScale;
Animate(mHighlight, placeAbove, bottom);
for (int i = 0, imax = labels.Count; i < imax; ++i)
{
Animate(labels[i], placeAbove, bottom);
}
AnimateColor(mBackground);
AnimateScale(mBackground, placeAbove, bottom);
}
// If we need to place the popup list above the item, we need to reposition everything by the size of the list
if (placeAbove)
{
t.localPosition = new Vector3(bounds.min.x, bounds.max.y - y - bgPadding.y, bounds.min.z);
}
}
else
{
OnSelect(false);
}
}
