First steps towards rationalising fbtk, split teh scrollbar widgets out

svn path=/trunk/netsurf/; revision=10466

1 files changed, 356 insertions, 0 deletions

diff --git a/framebuffer/fbtk_widget_scroll.c b/framebuffer/fbtk_widget_scroll.c
new file mode 100644
index 000000000..d9360c0e5
--- /dev/null
+++ b/framebuffer/fbtk_widget_scroll.c
@@ -0,0 +1,356 @@
+/*
+ * Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
+ *
+ * Framebuffer windowing toolkit scrollbar widgets
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+
+#include <libnsfb.h>
+#include <libnsfb_plot.h>
+#include <libnsfb_event.h>
+
+#include "utils/log.h"
+#include "desktop/browser.h"
+
+#include "framebuffer/gui.h"
+#include "framebuffer/fbtk.h"
+#include "framebuffer/fbtk_widget.h"
+#include "framebuffer/bitmap.h"
+#include "framebuffer/image_data.h"
+
+/** Vertical scroll widget */
+
+static int
+vscroll_redraw(fbtk_widget_t *root, fbtk_widget_t *widget, void *pw)
+{
+        int vscroll;
+        int vpos;
+
+        nsfb_bbox_t bbox;
+        nsfb_bbox_t rect;
+
+        fbtk_get_bbox(widget, &bbox);
+
+        nsfb_claim(root->u.root.fb, &bbox);
+
+        rect = bbox;
+
+	/* background */
+        nsfb_plot_rectangle_fill(root->u.root.fb, &rect, widget->bg);
+
+        rect.x0 = bbox.x0 + 2;
+        rect.y0 = bbox.y0 + 1;
+        rect.x1 = bbox.x1 - 3;
+        rect.y1 = bbox.y1 - 2;
+        nsfb_plot_rectangle_fill(root->u.root.fb, &rect, widget->fg);
+
+	/* scroll well */
+        nsfb_plot_rectangle(root->u.root.fb, &rect, 1, 0xFF999999, false, false);
+
+	/* scroll well outline */
+        vscroll = ((widget->height - 4) * widget->u.scroll.pct) / 100 ;
+        vpos = ((widget->height - 4) * widget->u.scroll.pos) / 100 ;
+
+        LOG(("scroll %d",vscroll));
+
+        rect.x0 = bbox.x0 + 5;
+        rect.y0 = bbox.y0 + 3 + vpos;
+        rect.x1 = bbox.x0 + widget->width - 5;
+        rect.y1 = bbox.y0 + vscroll + vpos;
+
+        nsfb_plot_rectangle_fill(root->u.root.fb, &rect, widget->bg);
+
+        nsfb_update(root->u.root.fb, &bbox);
+
+        return 0;
+}
+
+static int
+vscrollu_click(fbtk_widget_t *widget,
+                 nsfb_event_t *event,
+                 int x, int y, void *pw)
+{
+	fbtk_widget_t *scrollw = pw;
+	fbtk_callback_info cbi;
+
+        if (event->type != NSFB_EVENT_KEY_DOWN)
+        	return 0;
+
+	cbi.type = FBTK_CBIT_SCROLLY;
+	cbi.context = scrollw->callback_context;
+	cbi.y = -1;
+
+	return (scrollw->callback)(scrollw, &cbi);
+}
+
+static int
+vscrolld_click(fbtk_widget_t *widget,
+                 nsfb_event_t *event,
+                 int x, int y, void *pw)
+{
+	fbtk_widget_t *scrollw = pw;
+	fbtk_callback_info cbi;
+
+        if (event->type != NSFB_EVENT_KEY_DOWN)
+        	return 0;
+
+	cbi.type = FBTK_CBIT_SCROLLY;
+	cbi.context = scrollw->callback_context;
+	cbi.y = 1;
+
+	return (scrollw->callback)(scrollw, &cbi);
+}
+
+static int
+vscrollarea_click(fbtk_widget_t *widget,
+                 nsfb_event_t *event,
+                 int x, int y, void *pw)
+{
+	fbtk_widget_t *scrollw = pw;
+	fbtk_callback_info cbi;
+        int vscroll;
+        int vpos;
+
+        if (event->type != NSFB_EVENT_KEY_DOWN)
+        	return 0;
+
+        vscroll = ((widget->height - 4) * widget->u.scroll.pct) / 100 ;
+        vpos = ((widget->height - 4) * widget->u.scroll.pos) / 100 ;
+
+	cbi.type = FBTK_CBIT_SCROLLY;
+	cbi.context = scrollw->callback_context;
+	if (y < vpos) {
+                /* above bar */
+		cbi.y = -1;
+		return (scrollw->callback)(scrollw, &cbi);
+	} else if (y > (vpos+vscroll)) {
+                /* below bar */
+		cbi.y = 1;
+		return (scrollw->callback)(scrollw, &cbi);
+	}
+	return 0;
+}
+
+fbtk_widget_t *
+fbtk_create_vscroll(fbtk_widget_t *window, 
+		    int x, int y, 
+		    int width, int height, 
+		    colour fg, 
+		    colour bg,
+		    fbtk_callback callback,
+		    void *context)
+{
+        fbtk_widget_t *neww = new_widget(FB_WIDGET_TYPE_VSCROLL);
+
+        neww->x = x;
+        neww->y = y + scrollu.height;
+        neww->width = width;
+        neww->height = height - scrollu.height - scrolld.height;
+        neww->fg = fg;
+        neww->bg = bg;
+
+        neww->redraw = vscroll_redraw;
+
+	neww->click = vscrollarea_click;
+	neww->clickpw = neww;
+
+	neww->callback = callback;
+	neww->callback_context = context;
+
+	neww->u.scroll.btnul = fbtk_create_button(window, x + (width - scrollu.width) / 2, y, fg, &scrollu, vscrollu_click, neww);
+
+	neww->u.scroll.btndr = fbtk_create_button(window, x + (width - scrolld.width) / 2, y + height - scrolld.height, fg, &scrolld, vscrolld_click, neww);
+
+        return add_widget_to_window(window, neww);
+}
+
+/* Horizontal scroll widget */
+
+static int
+hscroll_redraw(fbtk_widget_t *root, fbtk_widget_t *widget, void *pw)
+{
+        int hscroll;
+        int hpos;
+        nsfb_bbox_t bbox;
+        nsfb_bbox_t rect;
+
+        fbtk_get_bbox(widget, &bbox);
+
+        nsfb_claim(root->u.root.fb, &bbox);
+
+        rect = bbox;
+
+	/* background */
+        nsfb_plot_rectangle_fill(root->u.root.fb, &rect, widget->bg);
+
+	/* scroll well */
+        rect.x0 = bbox.x0 + 1;
+        rect.y0 = bbox.y0 + 2;
+        rect.x1 = bbox.x1 - 2;
+        rect.y1 = bbox.y1 - 3;
+        nsfb_plot_rectangle_fill(root->u.root.fb, &rect, widget->fg);
+
+	/* scroll well outline */
+        nsfb_plot_rectangle(root->u.root.fb, &rect, 1, 0xFF999999, false, false);
+
+        hscroll = ((widget->width - 4) * widget->u.scroll.pct) / 100 ;
+        hpos = ((widget->width - 4) * widget->u.scroll.pos) / 100 ;
+
+        LOG(("hscroll %d",hscroll));
+
+        rect.x0 = bbox.x0 + 3 + hpos;
+        rect.y0 = bbox.y0 + 5;
+        rect.x1 = bbox.x0 + hscroll + hpos;
+        rect.y1 = bbox.y0 + widget->height - 5;
+
+        nsfb_plot_rectangle_fill(root->u.root.fb, &rect, widget->bg);
+
+        nsfb_update(root->u.root.fb, &bbox);
+
+        return 0;
+}
+
+static int
+hscrolll_click(fbtk_widget_t *widget,
+                 nsfb_event_t *event,
+                 int x, int y, void *pw)
+{
+	fbtk_widget_t *scrollw = pw;
+	fbtk_callback_info cbi;
+
+        if (event->type != NSFB_EVENT_KEY_DOWN)
+        	return 0;
+
+	cbi.type = FBTK_CBIT_SCROLLX;
+	cbi.context = scrollw->callback_context;
+	cbi.x = -1;
+
+	return (scrollw->callback)(scrollw, &cbi);
+}
+
+static int
+hscrollr_click(fbtk_widget_t *widget,
+                 nsfb_event_t *event,
+                 int x, int y, void *pw)
+{
+	fbtk_widget_t *scrollw = pw;
+	fbtk_callback_info cbi;
+
+        if (event->type != NSFB_EVENT_KEY_DOWN)
+        	return 0;
+
+	cbi.type = FBTK_CBIT_SCROLLX;
+	cbi.context = scrollw->callback_context;
+	cbi.x = 1;
+
+	return (scrollw->callback)(scrollw, &cbi);
+}
+
+static int
+hscrollarea_click(fbtk_widget_t *widget,
+                 nsfb_event_t *event,
+                 int x, int y, void *pw)
+{
+	fbtk_widget_t *scrollw = pw;
+	fbtk_callback_info cbi;
+        int hscroll;
+        int hpos;
+
+        if (event->type != NSFB_EVENT_KEY_DOWN)
+        	return 0;
+
+        hscroll = ((widget->width - 4) * widget->u.scroll.pct) / 100 ;
+        hpos = ((widget->width - 4) * widget->u.scroll.pos) / 100 ;
+
+	cbi.type = FBTK_CBIT_SCROLLX;
+	cbi.context = scrollw->callback_context;
+	if (x < hpos) {
+                /* above bar */
+		cbi.x = -1;
+		return (scrollw->callback)(scrollw, &cbi);
+	} else if (x > (hpos + hscroll)) {
+                /* below bar */
+		cbi.x = 1;
+		return (scrollw->callback)(scrollw, &cbi);
+	}
+	return 0;
+}
+
+fbtk_widget_t *
+fbtk_create_hscroll(fbtk_widget_t *window, 
+		    int x, int y, 
+		    int width, int height, 
+		    colour fg, 
+		    colour bg,
+		    fbtk_callback callback,
+		    void *context)
+{
+        fbtk_widget_t *neww = new_widget(FB_WIDGET_TYPE_HSCROLL);
+
+        neww->x = x + scrolll.width;
+        neww->y = y;
+        neww->width = width - scrolll.width - scrollr.width;
+        neww->height = height;
+        neww->fg = fg;
+        neww->bg = bg;
+
+        neww->redraw = hscroll_redraw;
+
+	neww->click = hscrollarea_click;
+	neww->clickpw = neww;
+
+	neww->callback = callback;
+	neww->callback_context = context;
+
+	neww->u.scroll.btnul = fbtk_create_button(window, x, y + ((height - scrolll.height) / 2), fg, &scrolll, hscrolll_click, neww);
+
+	neww->u.scroll.btndr = fbtk_create_button(window, x + width - scrollr.width, y + ((height - scrolll.height) / 2), fg, &scrollr, hscrollr_click, neww);
+
+        return add_widget_to_window(window, neww);
+}
+
+
+void
+fbtk_set_scroll(fbtk_widget_t *widget, int pct)
+{
+        if (widget == NULL)
+                return;
+
+        if ((widget->type == FB_WIDGET_TYPE_HSCROLL) ||
+            (widget->type == FB_WIDGET_TYPE_VSCROLL)) {
+
+                widget->u.scroll.pct = pct;
+                fbtk_request_redraw(widget);
+        }
+}
+
+void
+fbtk_set_scroll_pos(fbtk_widget_t *widget, int pos)
+{
+        if (widget == NULL)
+                return;
+
+        if ((widget->type == FB_WIDGET_TYPE_HSCROLL) ||
+            (widget->type == FB_WIDGET_TYPE_VSCROLL)) {
+
+        widget->u.scroll.pos = pos;
+
+        fbtk_request_redraw(widget);
+        }
+}
+