/// <summary>
/// Handle while mouse is down event.
/// The Scrollbar entity override this function to handle sliding mark up and down, instead of left-right.
/// </summary>
/// <param name="input">Input helper instance.</param>
override protected void DoWhileMouseDown(InputHelper input)
{
// if in the middle calculate value based on mouse position
if ((input.MousePosition.Y >= _destRect.Y + _frameActualHeight * 0.5) &&
(input.MousePosition.Y <= _destRect.Bottom - _frameActualHeight * 0.5))
{
float val = ((input.MousePosition.Y - _destRect.Y - _frameActualHeight + _markHeight / 2) / (_destRect.Height - _frameActualHeight * 2));
Value = (int)(Min + val * (Max - Min));
}
// call event handler
WhileMouseDown?.Invoke(this);
}
override protected void DoWhileMouseDown()
{
var mousePos = GetMousePos(p_LastScrollVal.ToVector2());
if ((mousePos.Y >= p_DrawArea.Y + _frameActualHeight * 0.5) && (mousePos.Y <= p_DrawArea.Bottom - _frameActualHeight * 0.5))
{
float relativePos = (mousePos.Y - p_DrawArea.Y - _frameActualHeight * 0.5f - _markHeight * 0.5f);
float internalHeight = (p_DrawArea.Height - _frameActualHeight) - _markHeight * 0.5f;
float relativeVal = (relativePos / internalHeight);
Value = (int)Math.Round(Min + relativeVal * (Max - Min));
}
WhileMouseDown?.Invoke(this);
}
/// <summary>
/// Handle while mouse is down event.
/// The Scrollbar entity override this function to handle sliding mark up and down, instead of left-right.
/// </summary>
/// <param name="input">Input helper instance.</param>
override protected void DoWhileMouseDown(InputHelper input)
{
// if in the middle calculate value based on mouse position
if ((input.MousePosition.Y >= _destRect.Y + _frameActualHeight * 0.5) &&
(input.MousePosition.Y <= _destRect.Bottom - _frameActualHeight * 0.5))
{
float relativePos = (input.MousePosition.Y - _destRect.Y - _frameActualHeight * 0.5f - _markHeight * 0.5f);
float internalHeight = (_destRect.Height - _frameActualHeight) - _markHeight * 0.5f;
float relativeVal = (relativePos / internalHeight);
Value = (int)System.Math.Round(Min + relativeVal * (Max - Min));
}
// call event handler
WhileMouseDown?.Invoke(this);
}
/// <summary>
/// Handle while mouse is down event.
/// The Scrollbar entity override this function to handle sliding mark up and down, instead of left-right.
/// </summary>
override protected void DoWhileMouseDown()
{
// get mouse position and apply scroll value
var mousePos = GetMousePos(_lastScrollVal.ToVector2());
// if in the middle calculate value based on mouse position
if ((mousePos.Y >= _destRect.Y + _frameActualHeight * 0.5) &&
(mousePos.Y <= _destRect.Bottom - _frameActualHeight * 0.5))
{
float relativePos = (mousePos.Y - _destRect.Y - _frameActualHeight * 0.5f - _markHeight * 0.5f);
float internalHeight = (_destRect.Height - _frameActualHeight) - _markHeight * 0.5f;
float relativeVal = (relativePos / internalHeight);
Value = (int)System.Math.Round(Min + relativeVal * (Max - Min));
}
// call event handler
WhileMouseDown?.Invoke(this);
}
/// <summary>
/// Create the DropDown list.
/// </summary>
/// <param name="size">List size (refers to the whole size of the list + the header when dropdown list is opened).</param>
/// <param name="anchor">Position anchor.</param>
/// <param name="offset">Offset from anchor position.</param>
/// <param name="skin">Panel skin to use for this DropDown list and header.</param>
public DropDown(Vector2 size, Anchor anchor = Anchor.Auto, Vector2?offset = null, PanelSkin skin = PanelSkin.ListBackground) :
base(size, anchor, offset)
{
// default padding of self is 0
Padding = Vector2.Zero;
// to get collision right when list is opened
UseActualSizeForCollision = true;
// create the panel and paragraph used to show currently selected value (what's shown when drop-down is closed)
_selectedTextPanel = new Panel(new Vector2(0, SelectedPanelHeight), skin, Anchor.TopLeft);
_selectedTextParagraph = UserInterface.DefaultParagraph(string.Empty, Anchor.CenterLeft);
_selectedTextParagraph.UseActualSizeForCollision = false;
_selectedTextParagraph.UpdateStyle(SelectList.DefaultParagraphStyle);
_selectedTextParagraph.UpdateStyle(DefaultParagraphStyle);
_selectedTextParagraph.UpdateStyle(DefaultSelectedParagraphStyle);
_selectedTextPanel.AddChild(_selectedTextParagraph, true);
// create the arrow down icon
_arrowDownImage = new Image(Resources.ArrowDown, new Vector2(ArrowSize, ArrowSize), ImageDrawMode.Stretch, Anchor.CenterRight, new Vector2(-10, 0));
_selectedTextPanel.AddChild(_arrowDownImage, true);
// create the list component
_selectList = new SelectList(size, Anchor.TopCenter, Vector2.Zero, skin);
// update list offset and space before
_selectList.SetOffset(new Vector2(0, SelectedPanelHeight));
_selectList.SpaceBefore = Vector2.Zero;
// add the header and select list as children
AddChild(_selectedTextPanel);
AddChild(_selectList);
// add callback on list value change
_selectList.OnValueChange = (Entity entity) =>
{
// hide list
ListVisible = false;
// set selected text
_selectedTextParagraph.Text = (SelectedValue ?? DefaultText);
};
// hide the list by default
_selectList.Visible = false;
// setup the callback to show / hide the list when clicking the dropbox
_selectedTextPanel.OnClick = (Entity self) =>
{
// change visibility
ListVisible = !ListVisible;
};
// set starting text
_selectedTextParagraph.Text = (SelectedValue ?? DefaultText);
// update styles
_selectList.UpdateStyle(DefaultStyle);
// make the list events trigger the dropdown events
_selectList.OnListChange += (Entity entity) => { OnListChange?.Invoke(this); };
_selectList.OnMouseDown += (Entity entity) => { OnMouseDown?.Invoke(this); };
_selectList.OnMouseReleased += (Entity entity) => { OnMouseReleased?.Invoke(this); };
_selectList.WhileMouseDown += (Entity entity) => { WhileMouseDown?.Invoke(this); };
_selectList.WhileMouseHover += (Entity entity) => { WhileMouseHover?.Invoke(this); };
_selectList.OnClick += (Entity entity) => { OnClick?.Invoke(this); };
_selectList.OnValueChange += (Entity entity) => { OnValueChange?.Invoke(this); };
_selectList.OnMouseEnter += (Entity entity) => { OnMouseEnter?.Invoke(this); };
_selectList.OnMouseLeave += (Entity entity) => { OnMouseLeave?.Invoke(this); };
_selectList.OnMouseWheelScroll += (Entity entity) => { OnMouseWheelScroll?.Invoke(this); };
_selectList.OnStartDrag += (Entity entity) => { OnStartDrag?.Invoke(this); };
_selectList.OnStopDrag += (Entity entity) => { OnStopDrag?.Invoke(this); };
_selectList.WhileDragging += (Entity entity) => { WhileDragging?.Invoke(this); };
_selectList.BeforeDraw += (Entity entity) => { BeforeDraw?.Invoke(this); };
_selectList.AfterDraw += (Entity entity) => { AfterDraw?.Invoke(this); };
_selectList.BeforeUpdate += (Entity entity) => { BeforeUpdate?.Invoke(this); };
_selectList.AfterUpdate += (Entity entity) => { AfterUpdate?.Invoke(this); };
// make the selected value panel trigger the dropdown events
_selectedTextPanel.OnMouseDown += (Entity entity) => { OnMouseDown?.Invoke(this); };
_selectedTextPanel.OnMouseReleased += (Entity entity) => { OnMouseReleased?.Invoke(this); };
_selectedTextPanel.WhileMouseDown += (Entity entity) => { WhileMouseDown?.Invoke(this); };
_selectedTextPanel.WhileMouseHover += (Entity entity) => { WhileMouseHover?.Invoke(this); };
_selectedTextPanel.OnClick += (Entity entity) => { OnClick?.Invoke(this); };
_selectedTextPanel.OnValueChange += (Entity entity) => { OnValueChange?.Invoke(this); };
_selectedTextPanel.OnMouseEnter += (Entity entity) => { OnMouseEnter?.Invoke(this); };
_selectedTextPanel.OnMouseLeave += (Entity entity) => { OnMouseLeave?.Invoke(this); };
_selectedTextPanel.OnMouseWheelScroll += (Entity entity) => { OnMouseWheelScroll?.Invoke(this); };
_selectedTextPanel.OnStartDrag += (Entity entity) => { OnStartDrag?.Invoke(this); };
_selectedTextPanel.OnStopDrag += (Entity entity) => { OnStopDrag?.Invoke(this); };
_selectedTextPanel.WhileDragging += (Entity entity) => { WhileDragging?.Invoke(this); };
_selectedTextPanel.BeforeDraw += (Entity entity) => { BeforeDraw?.Invoke(this); };
_selectedTextPanel.AfterDraw += (Entity entity) => { AfterDraw?.Invoke(this); };
_selectedTextPanel.BeforeUpdate += (Entity entity) => { BeforeUpdate?.Invoke(this); };
_selectedTextPanel.AfterUpdate += (Entity entity) => { AfterUpdate?.Invoke(this); };
}