From 743608327805de42d51d97a18e0ec07558b74c83 Mon Sep 17 00:00:00 2001
From: Niki Roo <niki@nikiroo.be>
Date: Fri, 8 Mar 2019 08:59:08 +0100
Subject: [PATCH] new: TSizeConstraint

---
 .../fanfix/reader/tui/TSizeConstraint.java    | 90 +++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 src/be/nikiroo/fanfix/reader/tui/TSizeConstraint.java

diff --git a/src/be/nikiroo/fanfix/reader/tui/TSizeConstraint.java b/src/be/nikiroo/fanfix/reader/tui/TSizeConstraint.java
new file mode 100644
index 0000000..3baf125
--- /dev/null
+++ b/src/be/nikiroo/fanfix/reader/tui/TSizeConstraint.java
@@ -0,0 +1,90 @@
+package be.nikiroo.fanfix.reader.tui;
+
+import java.util.List;
+
+import jexer.TScrollableWidget;
+import jexer.TWidget;
+import jexer.event.TResizeEvent;
+import jexer.event.TResizeEvent.Type;
+
+public class TSizeConstraint {
+	private TWidget widget;
+	private Integer x1;
+	private Integer y1;
+	private Integer x2;
+	private Integer y2;
+
+	// TODO: include in the window classes I use?
+
+	public TSizeConstraint(TWidget widget, Integer x1, Integer y1, Integer x2,
+			Integer y2) {
+		this.widget = widget;
+		this.x1 = x1;
+		this.y1 = y1;
+		this.x2 = x2;
+		this.y2 = y2;
+	}
+
+	public TWidget getWidget() {
+		return widget;
+	}
+
+	public Integer getX1() {
+		if (x1 != null && x1 < 0)
+			return widget.getParent().getWidth() + x1;
+		return x1;
+	}
+
+	public Integer getY1() {
+		if (y1 != null && y1 < 0)
+			return widget.getParent().getHeight() + y1;
+		return y1;
+	}
+
+	public Integer getX2() {
+		if (x2 != null && x2 <= 0)
+			return widget.getParent().getWidth() - 2 + x2;
+		return x2;
+	}
+
+	public Integer getY2() {
+		if (y2 != null && y2 <= 0)
+			return widget.getParent().getHeight() - 2 + y2;
+		return y2;
+	}
+
+	// coordinates < 0 = from the other side, x2 or y2 = 0 = max size
+	static void setSize(List<TSizeConstraint> list, TWidget child, Integer x1,
+			Integer y1, Integer x2, Integer y2) {
+		list.add(new TSizeConstraint(child, x1, y1, x2, y2));
+	}
+
+	static void resize(List<TSizeConstraint> sizeConstraints) {
+		for (TSizeConstraint sizeConstraint : sizeConstraints) {
+			TWidget widget = sizeConstraint.getWidget();
+			Integer x1 = sizeConstraint.getX1();
+			Integer y1 = sizeConstraint.getY1();
+			Integer x2 = sizeConstraint.getX2();
+			Integer y2 = sizeConstraint.getY2();
+
+			if (x1 != null)
+				widget.setX(x1);
+			if (y1 != null)
+				widget.setY(y1);
+
+			if (x2 != null)
+				widget.setWidth(x2 - widget.getX());
+			if (y2 != null)
+				widget.setHeight(y2 - widget.getY());
+
+			// Resize the text field
+			// TODO: why setW/setH/reflow not enough for the scrollbars?
+			widget.onResize(new TResizeEvent(Type.WIDGET, widget.getWidth(),
+					widget.getHeight()));
+
+			if (widget instanceof TScrollableWidget) {
+				((TScrollableWidget) widget).reflowData();
+			}
+		}
+	}
+}
-- 
2.27.0