From 1e327a6d6d5eac09f5692d9091043e87ea688e5d Mon Sep 17 00:00:00 2001
From: Javier <dev.git@javispedro.com>
Date: Tue, 13 Jan 2015 11:29:11 +0100
Subject: initial import

---
 qml/items/SketchArea.qml | 84 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 qml/items/SketchArea.qml

(limited to 'qml/items/SketchArea.qml')

diff --git a/qml/items/SketchArea.qml b/qml/items/SketchArea.qml
new file mode 100644
index 0000000..3a528d9
--- /dev/null
+++ b/qml/items/SketchArea.qml
@@ -0,0 +1,84 @@
+import QtQuick 2.0
+
+SketchView {
+    id: area
+    autoRepaint: false
+
+    property color fingerLineColor: Qt.rgba(1.0, 0.0, 0.0, 1.0)
+    property color stylusLineColor: Qt.rgba(0.0, 0.0, 0.0, 1.0)
+    property color eraserLineColor: Qt.rgba(1.0, 1.0, 1.0, 1.0)
+    property real curLineWidth: 4
+
+    function _boundingBox(points) {
+        if (!points.length) return Qt.rect(0, 0, 0, 0);
+        var x1 = points[0].x, y1 = points[0].y;
+        var x2 = x1, y2 = y1;
+
+        for (var i = 1; i < points.length; i++) {
+            if (points[i].x < x1) x1 = points[i].x;
+            if (points[i].y < y1) y1 = points[i].y;
+            if (points[i].x > x2) x2 = points[i].x;
+            if (points[i].y > y2) y2 = points[i].y;
+        }
+
+        return Qt.rect(x1, y1, x2 - x1, y2 - y1);
+    }
+
+    function _isStylusOn() {
+        return stylus.pressure > 0.15;
+    }
+    function _isEraserOn() {
+        return !_isStylusOn() && stylus.y > 0.85;
+    }
+
+    MouseArea {
+        anchors.fill: parent
+        preventStealing: true
+
+        onPressed: {
+            var point = Qt.point(mouse.x, mouse.y);
+            var stroke = {
+                lineWidth : curLineWidth,
+                lineColor : fingerLineColor,
+                stylus : false,
+                eraser : false,
+                boundingBox : Qt.rect(0, 0, area.width, area.height),
+                points : [point]
+            }
+            strokes.push(stroke);
+            canvas.requestPaint();
+        }
+        onReleased: {
+            canvas.requestPaint();
+        }
+        onPositionChanged: {
+            var cur_stroke = strokes[area.strokes.length - 1];
+            var point = Qt.point(mouse.x, mouse.y);
+            var prev_point = cur_stroke.points[cur_stroke.points.length - 1];
+            cur_stroke.points.push(point);
+            cur_stroke.boundingBox = _boundingBox(cur_stroke.points);
+
+            var rect = Qt.rect(Math.floor(Math.min(point.x, prev_point.x) - cur_stroke.lineWidth/2),
+                               Math.floor(Math.min(point.y, prev_point.y) - cur_stroke.lineWidth/2),
+                               Math.ceil(Math.abs(point.x - prev_point.x) + cur_stroke.lineWidth),
+                               Math.ceil(Math.abs(point.y - prev_point.y) + cur_stroke.lineWidth));
+
+            if (!cur_stroke.stylus) {
+                if (_isStylusOn()) {
+                    cur_stroke.stylus = true;
+                    cur_stroke.lineColor = stylusLineColor;
+                    canvas.requestPaint();
+                    return;
+                } else if (_isEraserOn()) {
+                    cur_stroke.stylus = true;
+                    cur_stroke.eraser = true;
+                    cur_stroke.lineColor = eraserLineColor;
+                    canvas.requestPaint();
+                    return;
+                }
+            }
+
+            canvas.markDirty(rect);
+        }
+    }
+}
-- 
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