From 31def6a33878b1ca8f5340d30708c853cdafefa1 Mon Sep 17 00:00:00 2001
From: Michael Drake <tlsa@netsurf-browser.org>
Date: Sat, 26 Jul 2014 22:12:55 +0100
Subject: Add rudimentary support for resizing.

- Currently only libnsfb's SDL surface supports resizing.
- Flickers like crazy while resizing.  Possibly because the SDL
  surface is not set to use double buffering.
- The internal widget library, fbtk, was never intended for this,
  as such it has no knowledge of how a widget should be positioned
  with respect to its parent.
  This means the top level window has to track everything and move
  them itself.
---
 framebuffer/fbtk/event.c  |  7 +++++++
 framebuffer/fbtk/fbtk.c   | 27 +++++++++++++++++++++++----
 framebuffer/fbtk/scroll.c | 41 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+), 4 deletions(-)

(limited to 'framebuffer/fbtk')

diff --git a/framebuffer/fbtk/event.c b/framebuffer/fbtk/event.c
index bd018c52c..2ef36321e 100644
--- a/framebuffer/fbtk/event.c
+++ b/framebuffer/fbtk/event.c
@@ -248,6 +248,13 @@ fbtk_event(fbtk_widget_t *root, nsfb_event_t *event, int timeout)
 			timeout = 0;
 			break;
 
+		case NSFB_EVENT_RESIZE:
+			/* Try to resize framebuffer */
+			gui_resize(root,
+					event->value.resize.w,
+					event->value.resize.h);
+			break;
+
 		default:
 			break;
 		}
diff --git a/framebuffer/fbtk/fbtk.c b/framebuffer/fbtk/fbtk.c
index 984748402..cb8aec57f 100644
--- a/framebuffer/fbtk/fbtk.c
+++ b/framebuffer/fbtk/fbtk.c
@@ -209,6 +209,29 @@ fbtk_set_pos_and_size(fbtk_widget_t *widget,
 		      int x, int y,
 		      int width, int height)
 {
+	if (widget->parent != NULL) {
+		fbtk_widget_t *parent = widget->parent;
+
+		/* make new window fit inside parent */
+		if (width == 0) {
+			width = parent->width - x;
+		} else if (width < 0) {
+			width = parent->width + width - x;
+		}
+		if ((width + x) > parent->width) {
+			width = parent->width - x;
+		}
+
+		if (height == 0) {
+			height = parent->height - y;
+		} else if (height < 0) {
+			height = parent->height + height - y;
+		}
+		if ((height + y) > parent->height) {
+			height = parent->height - y;
+		}
+	}
+
 	if ((widget->x != x) ||
 	    (widget->y != y) ||
 	    (widget->width != width) ||
@@ -217,10 +240,6 @@ fbtk_set_pos_and_size(fbtk_widget_t *widget,
 		widget->y = y;
 		widget->width = width;
 		widget->height = height;
-		/* @todo This should limit the redrawn area to the sum
-		 * of the old and new widget dimensions, not redraw the lot.
-		 */
-		fbtk_request_redraw(widget->parent);
 		return true;
 	}
 	return false;
diff --git a/framebuffer/fbtk/scroll.c b/framebuffer/fbtk/scroll.c
index 0ce56a6ee..e91c3ef6e 100644
--- a/framebuffer/fbtk/scroll.c
+++ b/framebuffer/fbtk/scroll.c
@@ -18,6 +18,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <assert.h>
+
 #include <stdbool.h>
 
 #include <libnsfb.h>
@@ -272,6 +274,26 @@ fbtk_create_vscroll(fbtk_widget_t *parent,
 	return neww;
 }
 
+
+/* exported function documented in fbtk.h */
+void
+fbtk_reposition_vscroll(fbtk_widget_t *vscroll,
+		    int x,
+		    int y,
+		    int width,
+		    int height)
+{
+	assert(vscroll->type == FB_WIDGET_TYPE_VSCROLL);
+
+	fbtk_set_pos_and_size(vscroll, x, y + scrollu.height,
+			width, height  - scrollu.height - scrolld.height);
+	fbtk_set_pos_and_size(vscroll->u.scroll.btnul,
+			x, y, width, scrollu.height);
+	fbtk_set_pos_and_size(vscroll->u.scroll.btndr,
+			x, y + height - scrolld.height,
+			width, scrolld.height);
+}
+
 /* Horizontal scroll widget */
 
 static int
@@ -488,6 +510,25 @@ fbtk_create_hscroll(fbtk_widget_t *parent,
 	return neww;
 }
 
+/* exported function documented in fbtk.h */
+void
+fbtk_reposition_hscroll(fbtk_widget_t *scrollh,
+		    int x,
+		    int y,
+		    int width,
+		    int height)
+{
+	assert(scrollh->type == FB_WIDGET_TYPE_HSCROLL);
+
+	fbtk_set_pos_and_size(scrollh, x + scrolll.width, y,
+			width - scrolll.width - scrollr.width, height);
+	fbtk_set_pos_and_size(scrollh->u.scroll.btnul,
+			x, y, scrolll.width, height);
+	fbtk_set_pos_and_size(scrollh->u.scroll.btndr,
+			x + width - scrollr.width, y,
+			scrollr.width, height);
+}
+
 
 /* exported function documented in fbtk.h */
 bool
-- 
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