From 646fd4f67d06ca4f3447e07321e11fa1ca03b261 Mon Sep 17 00:00:00 2001
From: sqshq <sqshq@sqshq.com>
Date: Sat, 13 Apr 2019 20:24:24 -0400
Subject: [PATCH] component selection using mouse click

---
 component/layout/layout.go | 48 +++++++++++++++++++++++++++++++++++++-
 component/menu.go          |  2 +-
 console/signal.go          |  1 +
 event/handler.go           |  5 +++-
 4 files changed, 53 insertions(+), 3 deletions(-)

diff --git a/component/layout/layout.go b/component/layout/layout.go
index b4c1065..92c4af7 100644
--- a/component/layout/layout.go
+++ b/component/layout/layout.go
@@ -66,7 +66,20 @@ func (l *Layout) changeMode(m Mode) {
 	l.ChangeModeEvents <- m
 }
 
-func (l *Layout) HandleConsoleEvent(e string) {
+func (l *Layout) HandleMouseClick(x int, y int) {
+	l.getSelection().CommandChannel <- &data.Command{Type: runchart.CommandMoveSelection, Value: 0}
+	l.menu.Idle()
+	selected, i := l.findComponentAtPoint(image.Point{X: x, Y: y})
+	if selected == nil {
+		l.changeMode(ModeDefault)
+	} else {
+		l.selection = i
+		l.menu.Highlight(selected)
+		l.changeMode(ModeComponentSelect)
+	}
+}
+
+func (l *Layout) HandleKeyboardEvent(e string) {
 
 	selected := l.getSelection()
 
@@ -289,6 +302,39 @@ func (l *Layout) Draw(buffer *ui.Buffer) {
 	l.menu.Draw(buffer)
 }
 
+func (l *Layout) findComponentAtPoint(point image.Point) (*component.Component, int) {
+
+	columnWidth := float64(l.GetRect().Dx()) / float64(columnsCount)
+	rowHeight := float64(l.GetRect().Dy()-statusbarHeight) / float64(rowsCount)
+
+	for i, c := range l.Components {
+
+		x1 := math.Floor(float64(c.Location.X) * columnWidth)
+		y1 := math.Floor(float64(c.Location.Y) * rowHeight)
+		x2 := x1 + math.Floor(float64(c.Size.X))*columnWidth
+		y2 := y1 + math.Floor(float64(c.Size.Y))*rowHeight
+
+		if x2-x1 < minDimension {
+			x2 = x1 + minDimension
+		}
+
+		if y2-y1 < minDimension {
+			y2 = y1 + minDimension
+		}
+
+		rectangle := image.Rectangle{Min: image.Point{
+			X: int(x1), Y: int(y1)},
+			Max: image.Point{X: int(x2), Y: int(y2)},
+		}
+
+		if point.In(rectangle) {
+			return c, i
+		}
+	}
+
+	return nil, -1
+}
+
 func (l *Layout) resetAlerts() {
 	for _, c := range l.Components {
 		c.AlertChannel <- nil
diff --git a/component/menu.go b/component/menu.go
index 4db4ff6..a581783 100644
--- a/component/menu.go
+++ b/component/menu.go
@@ -122,7 +122,7 @@ func (m *Menu) Draw(buffer *ui.Buffer) {
 
 func (m *Menu) renderHighlight(buffer *ui.Buffer) {
 
-	arrowsText := "Use arrows for selection"
+	arrowsText := "Use mouse or arrows for selection"
 	optionsText := "<ENTER> to view options"
 	resumeText := "<ESC> to resume"
 
diff --git a/console/signal.go b/console/signal.go
index b6fd8a5..b146df6 100644
--- a/console/signal.go
+++ b/console/signal.go
@@ -2,6 +2,7 @@ package console
 
 const (
 	SignalResize = "<Resize>"
+	SignalClick  = "<MouseLeft>"
 )
 
 const (
diff --git a/event/handler.go b/event/handler.go
index 6f672b7..e122efd 100644
--- a/event/handler.go
+++ b/event/handler.go
@@ -44,6 +44,9 @@ func (h *Handler) HandleEvents() {
 			ui.Render(h.layout)
 		case e := <-h.consoleEvents:
 			switch e.ID {
+			case console.SignalClick:
+				payload := e.Payload.(ui.Mouse)
+				h.layout.HandleMouseClick(payload.X, payload.Y)
 			case console.KeyQuit, console.KeyExit:
 				h.handleExit()
 				return
@@ -51,7 +54,7 @@ func (h *Handler) HandleEvents() {
 				payload := e.Payload.(ui.Resize)
 				h.layout.ChangeDimensions(payload.Width, payload.Height)
 			default:
-				h.layout.HandleConsoleEvent(e.ID)
+				h.layout.HandleKeyboardEvent(e.ID)
 			}
 		}
 	}