From 18856d889485abf5839ae50a93d1df07240ad666 Mon Sep 17 00:00:00 2001
From: "fnargwibble@gmail.com"
 <fnargwibble@gmail.com@ef4ab9da-24cd-11de-8aaa-f3a34680c41f>
Date: Mon, 23 Jan 2012 17:57:42 +0000
Subject: [PATCH] Navigate a page at a time in plot window

---
 client/proxguiqt.cpp | 90 ++++++++++++++++++++++++++++++++------------
 1 file changed, 65 insertions(+), 25 deletions(-)

diff --git a/client/proxguiqt.cpp b/client/proxguiqt.cpp
index 4e57fecc..b34eecfd 100644
--- a/client/proxguiqt.cpp
+++ b/client/proxguiqt.cpp
@@ -25,6 +25,7 @@
 int GridOffset= 0;
 bool GridLocked= 0;
 int startMax;
+int PageWidth;
 
 void ProxGuiQT::ShowGraphWindow(void)
 {
@@ -131,6 +132,8 @@ void ProxWidget::paintEvent(QPaintEvent *event)
 	painter.setPen(QColor(100, 100, 100));
 	painter.drawPath(greyPath);
 
+	PageWidth= (int)((r.right() - r.left() - 40) / GraphPixelsPerPoint);
+	
         // plot X and Y grid lines
         int i;
         if ((PlotGridX > 0) && ((PlotGridX * GraphPixelsPerPoint) > 1)) {
@@ -141,7 +144,7 @@ void ProxWidget::paintEvent(QPaintEvent *event)
         		lightgreyPath.moveTo(r.left()+i,r.top());
 			lightgreyPath.lineTo(r.left()+i,r.bottom());
 			painter.drawPath(lightgreyPath);
-                } 
+        	} 
         } 
         if ((PlotGridY > 0) && ((PlotGridY * GraphPixelsPerPoint) > 1)){
         	for(i = 0; i < ((r.top() + r.bottom())>>1); i += (int)(PlotGridY * GraphPixelsPerPoint)) {
@@ -151,9 +154,9 @@ void ProxWidget::paintEvent(QPaintEvent *event)
         		lightgreyPath.moveTo(r.left() + 40,zeroHeight - i);
 			lightgreyPath.lineTo(r.right(),zeroHeight - i);
 			painter.drawPath(lightgreyPath);
-        		}
         	}
-	
+        }
+
 	startMax = (GraphTraceLen - (int)((r.right() - r.left() - 40) / GraphPixelsPerPoint));
 	if(startMax < 0) {
 		startMax = 0;
@@ -311,6 +314,20 @@ void ProxWidget::mouseMoveEvent(QMouseEvent *event)
 
 void ProxWidget::keyPressEvent(QKeyEvent *event)
 {
+	int	offset;
+	int	gridchanged;
+
+	gridchanged= 0;
+
+	if(event->modifiers() & Qt::ShiftModifier) {
+		if (PlotGridX)
+			offset= PageWidth - (PageWidth % PlotGridX);
+		else
+			offset= PageWidth;
+	}
+	else
+		offset= (int)(20 / GraphPixelsPerPoint);
+
 	switch(event->key()) {
 		case Qt::Key_Down:
 			if(GraphPixelsPerPoint <= 50) {
@@ -326,32 +343,53 @@ void ProxWidget::keyPressEvent(QKeyEvent *event)
 
 		case Qt::Key_Right:
 			if(GraphPixelsPerPoint < 20) {
-				if (GridLocked && GraphStart < startMax)
-					GridOffset -= (int)(20 / GraphPixelsPerPoint);
-				GraphStart += (int)(20 / GraphPixelsPerPoint);
+				if (PlotGridX && GridLocked && GraphStart < startMax){
+					GridOffset -= offset;
+					GridOffset %= PlotGridX;
+					gridchanged= 1;
+				}
+				GraphStart += offset;
 			} else {
-				if (GridLocked && GraphStart < startMax)
+				if (PlotGridX && GridLocked && GraphStart < startMax){
 					GridOffset--;
+					GridOffset %= PlotGridX;
+					gridchanged= 1;
+				}
 				GraphStart++;
 			}
-			if(GridOffset < 0)
+			if(GridOffset < 0) {
 				GridOffset += PlotGridX;
-			if (PlotGridX)
-				GridOffset %= PlotGridX;
+			}
+			if (gridchanged)
+				if (GraphStart > startMax) {
+					GridOffset += (GraphStart - startMax);
+					GridOffset %= PlotGridX;
+				}
 			break;
 
 		case Qt::Key_Left:
 			if(GraphPixelsPerPoint < 20) {
-				if (GridLocked && GraphStart > 0)
-					GridOffset += (int)(20 / GraphPixelsPerPoint);
-				GraphStart -= (int)(20 / GraphPixelsPerPoint);
+				if (PlotGridX && GridLocked && GraphStart > 0){
+					GridOffset += offset;
+					GridOffset %= PlotGridX;
+					gridchanged= 1;
+				}
+				GraphStart -= offset;
 			} else {
-				if (GridLocked && GraphStart > 0)
+				if (PlotGridX && GridLocked && GraphStart > 0){
 					GridOffset++;
+					GridOffset %= PlotGridX;
+					gridchanged= 1;
+				}
 				GraphStart--;
 			}
-			if (PlotGridX)
-				GridOffset %= PlotGridX;
+			if (gridchanged){
+				if (GraphStart < 0)
+					GridOffset += GraphStart;
+				if(GridOffset < 0)
+					GridOffset += PlotGridX;
+			GridOffset %= PlotGridX;
+			}
 			break;
 
 		case Qt::Key_G:
@@ -366,15 +404,17 @@ void ProxWidget::keyPressEvent(QKeyEvent *event)
 
 		case Qt::Key_H:
 			puts("Plot Window Keystrokes:\n");
-			puts(" Key           Action\n");
-			puts(" DOWN          Zoom in");
-			puts(" G             Toggle grid display");
-			puts(" H             Show help");
-			puts(" LEFT          Move left");
-			puts(" L             Toggle lock grid relative to samples");
-			puts(" Q             Hide window");
-			puts(" RIGHT         Move right");
-			puts(" UP            Zoom out");
+			puts(" Key               Action\n");
+			puts(" DOWN              Zoom in");
+			puts(" G                 Toggle grid display");
+			puts(" H                 Show help");
+			puts(" LEFT              Move left");
+			puts(" <SHIFT>LEFT       Page left");
+			puts(" L                 Toggle lock grid relative to samples");
+			puts(" Q                 Hide window");
+			puts(" RIGHT             Move right");
+			puts(" <SHIFT>RIGHT      Page right");
+			puts(" UP                Zoom out");
 			puts("");
 			puts("Use client window 'data help' for more plot commands\n");
 			break;
-- 
2.39.2