TabButton.cs
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using System;
using UnityEditor;
using UnityEngine;
namespace Unity.PlasticSCM.Editor.UI
{
internal class TabButton
{
internal bool DrawTabButton(
string buttonText,
bool wasActive,
float width)
{
bool isCloseButtonClicked;
return DrawClosableTabButton(
buttonText,
wasActive,
false,
width,
null,
out isCloseButtonClicked);
}
internal bool DrawClosableTabButton(
string buttonText,
bool wasActive,
bool isClosable,
float width,
Action repaintAction,
out bool isCloseButtonClicked)
{
isCloseButtonClicked = false;
GUIContent buttonContent = new GUIContent(buttonText);
GUIStyle buttonStyle = UnityStyles.PlasticWindow.TabButton;
Rect toggleRect = GUILayoutUtility.GetRect(
buttonContent, buttonStyle,
GUILayout.Width(width));
if (isClosable && Event.current.type == EventType.MouseMove)
{
if (mCloseButtonRect.Contains(Event.current.mousePosition))
{
SetCloseButtonState(
CloseButtonState.Hovered,
repaintAction);
}
else
{
SetCloseButtonState(
CloseButtonState.Normal,
repaintAction);
}
}
if (isClosable && Event.current.type == EventType.MouseDown)
{
if (mCloseButtonRect.Contains(Event.current.mousePosition))
{
SetCloseButtonState(
CloseButtonState.Clicked,
repaintAction);
Event.current.Use();
}
}
if (isClosable && Event.current.type == EventType.MouseUp)
{
if (mCloseButtonRect.Contains(Event.current.mousePosition))
{
Event.current.Use();
isCloseButtonClicked = true;
}
if (IsTabClickWithMiddleButton(toggleRect, Event.current))
{
Event.current.Use();
isCloseButtonClicked = true;
}
SetCloseButtonState(
CloseButtonState.Normal,
repaintAction);
}
bool isActive = GUI.Toggle(
toggleRect, wasActive, buttonText, buttonStyle);
if (isClosable && toggleRect.height > 1)
{
mCloseButtonRect = DrawCloseButton(
toggleRect,
mCloseButtonState);
}
if (wasActive)
{
DrawUnderline(toggleRect);
}
return isActive;
}
static Rect DrawCloseButton(
Rect toggleRect,
CloseButtonState state)
{
int closeButtonSize = 15;
GUIContent closeImage = new GUIContent(GetCloseImage(state));
Rect closeTabRect = new Rect(
toggleRect.xMax - closeButtonSize - 1,
toggleRect.y + (toggleRect.height / 2 - closeButtonSize / 2),
closeButtonSize,
closeButtonSize);
GUI.Button(closeTabRect, closeImage, EditorStyles.label);
return new Rect(
closeTabRect.x - 1,
closeTabRect.y - 1,
closeTabRect.width + 2,
closeTabRect.height + 2);
}
static void DrawUnderline(Rect toggleRect)
{
GUIStyle activeTabStyle =
UnityStyles.PlasticWindow.ActiveTabUnderline;
Rect underlineRect = new Rect(
toggleRect.x,
toggleRect.yMax - (activeTabStyle.fixedHeight / 2),
toggleRect.width,
activeTabStyle.fixedHeight);
GUI.Label(underlineRect, string.Empty, activeTabStyle);
}
static bool IsTabClickWithMiddleButton(Rect toggleRect, Event currentEvent)
{
if (currentEvent.button != 2)
return false;
return toggleRect.height > 1 &&
toggleRect.Contains(Event.current.mousePosition);
}
static Texture GetCloseImage(CloseButtonState state)
{
if (state == CloseButtonState.Hovered)
return Images.GetHoveredCloseIcon();
if (state == CloseButtonState.Clicked)
return Images.GetClickedCloseIcon();
return Images.GetCloseIcon();
}
void SetCloseButtonState(
CloseButtonState newState,
Action repaintAction)
{
if (mCloseButtonState == newState)
return;
mCloseButtonState = newState;
if (repaintAction != null)
repaintAction();
}
Rect mCloseButtonRect;
CloseButtonState mCloseButtonState;
enum CloseButtonState
{
Normal,
Clicked,
Hovered,
}
}
}