summaryrefslogtreecommitdiff
path: root/frontends/kolibrios/fb/fbtk/scroll.c
diff options
context:
space:
mode:
Diffstat (limited to 'frontends/kolibrios/fb/fbtk/scroll.c')
-rw-r--r--frontends/kolibrios/fb/fbtk/scroll.c589
1 files changed, 589 insertions, 0 deletions
diff --git a/frontends/kolibrios/fb/fbtk/scroll.c b/frontends/kolibrios/fb/fbtk/scroll.c
new file mode 100644
index 000000000..cc98fb2dd
--- /dev/null
+++ b/frontends/kolibrios/fb/fbtk/scroll.c
@@ -0,0 +1,589 @@
+/*
+ * Copyright 2010 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 <assert.h>
+
+#include <stdbool.h>
+
+#include <libnsfb.h>
+#include <libnsfb_plot.h>
+#include <libnsfb_event.h>
+#include <libnsfb_cursor.h>
+
+#include "utils/log.h"
+#include "netsurf/browser_window.h"
+
+#include "framebuffer/gui.h"
+#include "framebuffer/fbtk.h"
+#include "framebuffer/image_data.h"
+
+#include "widget.h"
+
+/* Vertical scroll widget */
+
+static int
+vscroll_redraw(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int vscroll;
+ int vpos;
+
+ nsfb_bbox_t bbox;
+ nsfb_bbox_t rect;
+ fbtk_widget_t *root = fbtk_get_root_widget(widget);
+
+ 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 + 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);
+ nsfb_plot_rectangle(root->u.root.fb, &rect, 1, 0xFF999999, false, false);
+
+ /* scroll bar */
+ if ((widget->u.scroll.maximum - widget->u.scroll.minimum) > 0) {
+ vscroll = ((widget->height - 4) * widget->u.scroll.thumb) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ vpos = ((widget->height - 4) * widget->u.scroll.position) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ } else {
+ vscroll = (widget->height - 4);
+ vpos = 0;
+ }
+
+ 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
+vscroll_drag(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int newpos;
+ fbtk_widget_t *scrollw = cbi->context;
+
+ newpos = ((widget->u.scroll.drag_position +
+ (cbi->y - widget->u.scroll.drag)) *
+ (widget->u.scroll.maximum - widget->u.scroll.minimum)) /
+ (widget->height - 4);
+
+ if (newpos < scrollw->u.scroll.minimum)
+ newpos = scrollw->u.scroll.minimum;
+
+ if (newpos > (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb ))
+ newpos = (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb);
+
+ if (newpos == scrollw->u.scroll.position)
+ return 0;
+
+ return fbtk_post_callback(widget, FBTK_CBT_SCROLLY, newpos);
+}
+
+static int
+vscrollu_click(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int newpos;
+ fbtk_widget_t *scrollw = cbi->context;
+
+ if (cbi->event->type != NSFB_EVENT_KEY_DOWN)
+ return 0;
+
+ newpos = scrollw->u.scroll.position - scrollw->u.scroll.page;
+ if (newpos < scrollw->u.scroll.minimum)
+ newpos = scrollw->u.scroll.minimum;
+
+ if (newpos == scrollw->u.scroll.position)
+ return 0;
+
+ return fbtk_post_callback(scrollw, FBTK_CBT_SCROLLY, newpos);
+}
+
+static int
+vscrolld_click(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int newpos;
+ fbtk_widget_t *scrollw = cbi->context;
+
+ if (cbi->event->type != NSFB_EVENT_KEY_DOWN)
+ return 0;
+
+ newpos = scrollw->u.scroll.position + scrollw->u.scroll.page;
+ if (newpos > (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb ))
+ newpos = (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb);
+
+ if (newpos == scrollw->u.scroll.position)
+ return 0;
+
+ return fbtk_post_callback(scrollw, FBTK_CBT_SCROLLY, newpos);
+}
+
+static int
+vscrollarea_click(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int vscroll;
+ int vpos;
+ int newpos;
+ int ret = 0;
+
+ if (cbi->event->type != NSFB_EVENT_KEY_DOWN) {
+ /* end all drags, just in case */
+ if (fbtk_set_handler(widget, FBTK_CBT_POINTERMOVE, NULL, NULL) != NULL)
+ fbtk_tgrab_pointer(widget);
+ return 0;
+ }
+
+ switch (cbi->event->value.keycode) {
+
+ case NSFB_KEY_MOUSE_4:
+ /* scroll up */
+ newpos = widget->u.scroll.position - widget->u.scroll.page;
+ if (newpos < widget->u.scroll.minimum)
+ newpos = widget->u.scroll.minimum;
+ ret = fbtk_post_callback(cbi->context, FBTK_CBT_SCROLLY, newpos);
+ break;
+
+ case NSFB_KEY_MOUSE_5:
+ /* scroll down */
+ newpos = widget->u.scroll.position + widget->u.scroll.page;
+ if (newpos > widget->u.scroll.maximum)
+ newpos = widget->u.scroll.maximum;
+ ret = fbtk_post_callback(cbi->context, FBTK_CBT_SCROLLY, newpos);
+ break;
+
+ default:
+
+ if ((widget->u.scroll.maximum - widget->u.scroll.minimum) > 0) {
+ vscroll = ((widget->height - 4) * widget->u.scroll.thumb) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ vpos = ((widget->height - 4) * widget->u.scroll.position) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ } else {
+ vscroll = (widget->height - 4);
+ vpos = 0;
+ }
+
+ if (cbi->y < vpos) {
+ /* above bar */
+ newpos = widget->u.scroll.position - widget->u.scroll.thumb;
+ if (newpos < widget->u.scroll.minimum)
+ newpos = widget->u.scroll.minimum;
+ ret = fbtk_post_callback(cbi->context, FBTK_CBT_SCROLLY, newpos);
+ } else if (cbi->y > (vpos + vscroll)) {
+ /* below bar */
+ newpos = widget->u.scroll.position + widget->u.scroll.thumb;
+ if (newpos > widget->u.scroll.maximum)
+ newpos = widget->u.scroll.maximum;
+ ret = fbtk_post_callback(cbi->context, FBTK_CBT_SCROLLY, newpos);
+ } else {
+ /* on bar - start drag */
+ widget->u.scroll.drag = cbi->y;
+ widget->u.scroll.drag_position = vpos;
+ fbtk_set_handler(widget, FBTK_CBT_POINTERMOVE, vscroll_drag, widget);
+ fbtk_tgrab_pointer(widget);
+ }
+ }
+ return ret;
+}
+
+
+/* exported function documented in fbtk.h */
+fbtk_widget_t *
+fbtk_create_vscroll(fbtk_widget_t *parent,
+ int x,
+ int y,
+ int width,
+ int height,
+ colour fg,
+ colour bg,
+ fbtk_callback callback,
+ void *context)
+{
+ fbtk_widget_t *neww;
+
+ neww = fbtk_widget_new(parent,
+ FB_WIDGET_TYPE_VSCROLL,
+ x,
+ y + scrollu.height,
+ width,
+ height - scrollu.height - scrolld.height);
+
+ neww->fg = fg;
+ neww->bg = bg;
+ neww->mapped = true;
+
+ fbtk_set_handler(neww, FBTK_CBT_REDRAW, vscroll_redraw, NULL);
+
+ fbtk_set_handler(neww, FBTK_CBT_CLICK, vscrollarea_click, neww);
+
+ fbtk_set_handler(neww, FBTK_CBT_SCROLLY, callback, context);
+
+ neww->u.scroll.btnul = fbtk_create_button(parent,
+ x,
+ y,
+ width,
+ scrollu.height,
+ fg,
+ &scrollu,
+ vscrollu_click,
+ neww);
+
+ neww->u.scroll.btndr = fbtk_create_button(parent,
+ x,
+ y + height - scrolld.height,
+ width,
+ scrolld.height,
+ fg,
+ &scrolld,
+ vscrolld_click,
+ neww);
+
+
+ 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
+hscroll_redraw(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int hscroll;
+ int hpos;
+ nsfb_bbox_t bbox;
+ nsfb_bbox_t rect;
+ fbtk_widget_t *root = fbtk_get_root_widget(widget);
+
+ 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);
+
+ if ((widget->u.scroll.maximum - widget->u.scroll.minimum) > 0) {
+ hscroll = ((widget->width - 4) * widget->u.scroll.thumb) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ hpos = ((widget->width - 4) * widget->u.scroll.position) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ } else {
+ hscroll = (widget->width - 4);
+ hpos = 0;
+ }
+
+ 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, fbtk_callback_info *cbi)
+{
+ int newpos;
+ fbtk_widget_t *scrollw = cbi->context;
+
+ if (cbi->event->type != NSFB_EVENT_KEY_DOWN)
+ return 0;
+
+ newpos = scrollw->u.scroll.position - scrollw->u.scroll.page;
+ if (newpos < scrollw->u.scroll.minimum)
+ newpos = scrollw->u.scroll.minimum;
+
+ if (newpos == scrollw->u.scroll.position) {
+ LOG("horiz scroll was the same %d", newpos);
+ return 0;
+ }
+
+ return fbtk_post_callback(scrollw, FBTK_CBT_SCROLLX, newpos);
+}
+
+static int
+hscrollr_click(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int newpos;
+ fbtk_widget_t *scrollw = cbi->context;
+
+ if (cbi->event->type != NSFB_EVENT_KEY_DOWN)
+ return 0;
+
+ newpos = scrollw->u.scroll.position + scrollw->u.scroll.page;
+ if (newpos > (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb ))
+ newpos = (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb);
+
+ if (newpos == scrollw->u.scroll.position)
+ return 0;
+
+ return fbtk_post_callback(scrollw, FBTK_CBT_SCROLLX, newpos);
+}
+
+static int
+hscroll_drag(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int newpos;
+ fbtk_widget_t *scrollw = cbi->context;
+
+ newpos = ((widget->u.scroll.drag_position +
+ (cbi->x - widget->u.scroll.drag)) *
+ (widget->u.scroll.maximum - widget->u.scroll.minimum)) /
+ (widget->width - 4);
+
+ if (newpos < scrollw->u.scroll.minimum)
+ newpos = scrollw->u.scroll.minimum;
+
+ if (newpos > (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb ))
+ newpos = (scrollw->u.scroll.maximum - scrollw->u.scroll.thumb);
+
+ if (newpos == scrollw->u.scroll.position)
+ return 0;
+
+ return fbtk_post_callback(widget, FBTK_CBT_SCROLLX, newpos);
+}
+
+static int
+hscrollarea_click(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int hscroll;
+ int hpos;
+ int newpos;
+ int ret = 0;
+
+ if (cbi->event->type != NSFB_EVENT_KEY_DOWN) {
+ /* end all drags, just in case */
+ if (fbtk_set_handler(widget, FBTK_CBT_POINTERMOVE, NULL, NULL) != NULL)
+ fbtk_tgrab_pointer(widget);
+ return 0;
+ }
+
+ if ((widget->u.scroll.maximum - widget->u.scroll.minimum) > 0) {
+ hscroll = ((widget->width - 4) * widget->u.scroll.thumb) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ hpos = ((widget->width - 4) * widget->u.scroll.position) /
+ (widget->u.scroll.maximum - widget->u.scroll.minimum) ;
+ } else {
+ hscroll = (widget->width - 4);
+ hpos = 0;
+ }
+
+ if (cbi->x < hpos) {
+ /* left of bar */
+ newpos = widget->u.scroll.position - widget->u.scroll.page;
+ if (newpos < widget->u.scroll.minimum)
+ newpos = widget->u.scroll.minimum;
+ ret = fbtk_post_callback(cbi->context, FBTK_CBT_SCROLLX, newpos);
+ } else if (cbi->x > (hpos + hscroll)) {
+ /* right of bar */
+ newpos = widget->u.scroll.position + widget->u.scroll.page;
+ if (newpos > widget->u.scroll.maximum)
+ newpos = widget->u.scroll.maximum;
+ ret = fbtk_post_callback(cbi->context, FBTK_CBT_SCROLLX, newpos);
+ } else {
+ /* on bar - start drag */
+ widget->u.scroll.drag = cbi->x;
+ widget->u.scroll.drag_position = hpos;
+ fbtk_set_handler(widget, FBTK_CBT_POINTERMOVE, hscroll_drag, widget);
+ fbtk_tgrab_pointer(widget);
+ }
+ return ret;
+}
+
+/* exported function documented in fbtk.h */
+fbtk_widget_t *
+fbtk_create_hscroll(fbtk_widget_t *parent,
+ int x,
+ int y,
+ int width,
+ int height,
+ colour fg,
+ colour bg,
+ fbtk_callback callback,
+ void *context)
+{
+ fbtk_widget_t *neww;
+
+ neww = fbtk_widget_new(parent,
+ FB_WIDGET_TYPE_HSCROLL,
+ x + scrolll.width,
+ y,
+ width - scrolll.width - scrollr.width,
+ height);
+
+ neww->fg = fg;
+ neww->bg = bg;
+ neww->mapped = true;
+
+ fbtk_set_handler(neww, FBTK_CBT_REDRAW, hscroll_redraw, NULL);
+ fbtk_set_handler(neww, FBTK_CBT_CLICK, hscrollarea_click, neww);
+ fbtk_set_handler(neww, FBTK_CBT_SCROLLX, callback, context);
+
+ neww->u.scroll.btnul = fbtk_create_button(parent,
+ x,
+ y,
+ scrolll.width,
+ height,
+ fg,
+ &scrolll,
+ hscrolll_click,
+ neww);
+
+ neww->u.scroll.btndr = fbtk_create_button(parent,
+ x + width - scrollr.width,
+ y,
+ scrollr.width,
+ height,
+ fg,
+ &scrollr,
+ hscrollr_click,
+ neww);
+
+ 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
+fbtk_set_scroll_parameters(fbtk_widget_t *widget,
+ int min,
+ int max,
+ int thumb,
+ int page)
+{
+ if (widget == NULL)
+ return false;
+
+ if ((widget->type != FB_WIDGET_TYPE_HSCROLL) &&
+ (widget->type != FB_WIDGET_TYPE_VSCROLL))
+ return false;
+
+ widget->u.scroll.minimum = min;
+ widget->u.scroll.maximum = max;
+ widget->u.scroll.thumb = thumb;
+ widget->u.scroll.page = page;
+
+ if (widget->u.scroll.position > max)
+ widget->u.scroll.position = max;
+ if (widget->u.scroll.position < min)
+ widget->u.scroll.position = min;
+
+ fbtk_request_redraw(widget);
+
+ return true;
+}
+
+/* exported function documented in fbtk.h */
+bool
+fbtk_set_scroll_position(fbtk_widget_t *widget, int position)
+{
+ if (widget == NULL)
+ return false;
+
+ if ((widget->type != FB_WIDGET_TYPE_HSCROLL) &&
+ (widget->type != FB_WIDGET_TYPE_VSCROLL))
+ return false;
+
+ if ((position < widget->u.scroll.minimum) ||
+ (position > widget->u.scroll.maximum))
+ return false;
+
+ widget->u.scroll.position = position;
+
+ fbtk_request_redraw(widget);
+
+ return true;
+}
+
+/*
+ * Local Variables:
+ * c-basic-offset:8
+ * End:
+ */