From 03b82b417a604339eb4acb51bf17d1be8b830c14 Mon Sep 17 00:00:00 2001
From: terencehill <piuntn@gmail.com>
Date: Wed, 8 Jun 2011 00:07:15 +0200
Subject: [PATCH] Make possible to move the zoomed-in screenshot on mouse drag

---
 qcsrc/menu/item/image.c              | 36 +++++++++++++++++++++++++++-
 qcsrc/menu/xonotic/screenshotimage.c | 13 ++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/qcsrc/menu/item/image.c b/qcsrc/menu/item/image.c
index 1ae925538..901001b65 100644
--- a/qcsrc/menu/item/image.c
+++ b/qcsrc/menu/item/image.c
@@ -6,10 +6,15 @@ CLASS(Image) EXTENDS(Item)
 	METHOD(Image, resizeNotify, void(entity, vector, vector, vector, vector))
 	METHOD(Image, updateAspect, void(entity))
 	METHOD(Image, setZoom, void(entity, float))
+	METHOD(Image, startZoomMove, float(entity, vector))
+	METHOD(Image, zoomMove, float(entity, vector))
 	ATTRIB(Image, src, string, string_null)
 	ATTRIB(Image, color, vector, '1 1 1')
 	ATTRIB(Image, forcedAspect, float, 0)
 	ATTRIB(Image, zoomFactor, float, 1)
+	ATTRIB(Image, zoomOffset, vector, '0.5 0.5 0')
+	ATTRIB(Image, start_zoomOffset, vector, '0 0 0')
+	ATTRIB(Image, start_coords, vector, '0 0 0')
 	ATTRIB(Image, imgOrigin, vector, '0 0 0')
 	ATTRIB(Image, imgSize, vector, '0 0 0')
 ENDCLASS(Image)
@@ -23,6 +28,7 @@ string Image_toString(entity me)
 void Image_configureImage(entity me, string path)
 {
 	me.src = path;
+	me.zoomOffset = '0.5 0.5 0';
 	me.zoomFactor = 1;
 }
 void Image_draw(entity me)
@@ -64,9 +70,35 @@ void Image_updateAspect(entity me)
 			me.imgSize = eX + eY * (me.size_x / (asp * me.size_y));
 		}
 		if (me.zoomFactor)
+		{
+			if (me.zoomFactor > 1)
+			{
+				me.zoomOffset_x = bound(0, me.zoomOffset_x, 1);
+				me.zoomOffset_y = bound(0, me.zoomOffset_y, 1);
+			}
 			me.imgSize = me.imgSize * me.zoomFactor;
-		me.imgOrigin = '0.5 0.5 0' - 0.5 * me.imgSize;
+		}
+		me.imgOrigin_x = 0.5 - me.zoomOffset_x * me.imgSize_x;
+		me.imgOrigin_y = 0.5 - me.zoomOffset_y * me.imgSize_y;
+	}
+}
+float Image_startZoomMove(entity me, vector coords)
+{
+	if (me.zoomFactor > 1)
+	{
+		me.start_zoomOffset = me.zoomOffset;
+		me.start_coords = coords;
+	}
+	return 1;
+}
+float Image_zoomMove(entity me, vector coords)
+{
+	if (me.zoomFactor > 1)
+	{
+		me.zoomOffset = me.start_zoomOffset + (me.start_coords - coords)*(1/me.zoomFactor);
+		me.updateAspect(me);
 	}
+	return 1;
 }
 void Image_setZoom(entity me, float z)
 {
@@ -77,6 +109,8 @@ void Image_setZoom(entity me, float z)
 	else
 		me.zoomFactor *= z;
 	me.zoomFactor = bound(1/16, me.zoomFactor, 16);
+	if (me.zoomFactor <= 1)
+		me.zoomOffset = '0.5 0.5 0';
 	me.updateAspect(me);
 }
 void Image_resizeNotify(entity me, vector relOrigin, vector relSize, vector absOrigin, vector absSize)
diff --git a/qcsrc/menu/xonotic/screenshotimage.c b/qcsrc/menu/xonotic/screenshotimage.c
index b621c0f9d..77a9a9fbf 100644
--- a/qcsrc/menu/xonotic/screenshotimage.c
+++ b/qcsrc/menu/xonotic/screenshotimage.c
@@ -2,6 +2,9 @@
 CLASS(XonoticScreenshotImage) EXTENDS(Image)
 	METHOD(XonoticScreenshotImage, configureXonoticScreenshotImage, void(entity, string))
 	METHOD(XonoticScreenshotImage, draw, void(entity))
+	ATTRIB(XonoticScreenshotImage, focusable, float, 1) // mousePress and mouseDrag work only if focusable is set
+	METHOD(XonoticScreenshotImage, mousePress, float(entity, vector))
+	METHOD(XonoticScreenshotImage, mouseDrag, float(entity, vector))
 	METHOD(XonoticScreenshotImage, resizeNotify, void(entity, vector, vector, vector, vector))
 	ATTRIB(XonoticScreenshotImage, realFontSize, vector, '0 0 0')
 	ATTRIB(XonoticScreenshotImage, fontSize, float, SKINFONTSIZE_NORMAL)
@@ -32,6 +35,16 @@ void XonoticScreenshotImage_configureXonoticScreenshotImage(entity me, string th
 	me.screenshotTitle = strzone(substring(me.src, 13, strlen(theImage) - 13)); //strip "/screenshots/"
 }
 
+float XonoticScreenshotImage_mousePress(entity me, vector coords)
+{
+	return me.startZoomMove(me, coords);
+}
+
+float XonoticScreenshotImage_mouseDrag(entity me, vector coords)
+{
+	return me.zoomMove(me, coords);
+}
+
 void XonoticScreenshotImage_draw(entity me)
 {
 	if (me.src != "")
-- 
2.39.2