eeshow/: add AOI to overlays; clicking on sheet name returns to previous sheet

eeshow/gui-aoi.c

@@ -26,7 +26,7 @@
 static const struct aoi *hovering = NULL;
 
 
-void aoi_add(struct aoi **aois, const struct aoi *aoi)
+const struct aoi *aoi_add(struct aoi **aois, const struct aoi *aoi)
 {
 	struct aoi *new;
 
@@ -34,6 +34,8 @@ void aoi_add(struct aoi **aois, const struct aoi *aoi)
 	*new = *aoi;
 	new->next = *aois;
 	*aois = new;
+
+	return new;
 }
 
 
@@ -79,3 +81,14 @@ bool aoi_click(const struct aoi *aois, int x, int y)
 	}
 	return 0;
 }
+
+
+void aoi_remove(struct aoi **aois, const struct aoi *aoi)
+{
+	if (hovering == aoi)
+		aoi->hover(aoi->user, 0);
+	while (*aois != aoi)
+		aois = &(*aois)->next;
+	*aois = aoi->next;
+	free((void *) aoi);
+}

eeshow/gui-aoi.h

@@ -28,8 +28,9 @@ struct aoi {
 };
 
 
-void aoi_add(struct aoi **aois, const struct aoi *aoi);
+const struct aoi *aoi_add(struct aoi **aois, const struct aoi *aoi);
 bool aoi_hover(const struct aoi *aois, int x, int y);
 bool aoi_click(const struct aoi *aois, int x, int y);
+void aoi_remove(struct aoi **aois, const struct aoi *aoi);
 
 #endif /* !GUI_AOI_H */

eeshow/gui-over.c

@@ -25,6 +25,7 @@
 #include <cairo/cairo.h>
 
 #include "util.h"
+#include "gui-aoi.h"
 #include "gui-over.h"
 
 
@@ -38,6 +39,14 @@
 
 struct overlay {
 	const char *s;
+
+	struct aoi **aois;
+	bool (*hover)(void *user, bool on);
+	void (*click)(void *user);
+	void *user;
+
+	const struct aoi *aoi;
+
 	struct overlay *next;
 };
 
@@ -55,17 +64,18 @@ static void rrect(cairo_t *cr, int x, int y, int w, int h, int r)
 }
 
 
-static void overlay_draw(const struct overlay *over, cairo_t *cr,
-    int *x, int *y)
+static void overlay_draw(struct overlay *over, cairo_t *cr, int *x, int *y)
 {
 	cairo_text_extents_t ext;
+	int w, h;
 
 	cairo_set_font_size(cr, OVER_FONT_SIZE);
 	cairo_text_extents(cr, over->s, &ext);
 
-	rrect(cr, *x, *y,
-	    ext.width + 2 * OVER_BORDER, ext.height + 2 * OVER_BORDER,
-	    OVER_RADIUS);
+	w = ext.width + 2 * OVER_BORDER;
+	h = ext.height + 2 * OVER_BORDER;
+
+	rrect(cr, *x, *y, w, h, OVER_RADIUS);
 
 	cairo_set_source_rgba(cr, 0.8, 0.9, 1, 0.8);
 	cairo_fill_preserve(cr);
@@ -77,13 +87,29 @@ static void overlay_draw(const struct overlay *over, cairo_t *cr,
 	cairo_move_to(cr, *x + OVER_BORDER, *y + OVER_BORDER + ext.height);
 	cairo_show_text(cr, over->s);
 
+	if (over->hover || over->click) {
+		struct aoi aoi = {
+			.x	= *x,
+			.y	= *y,
+			.w	= w,
+			.h	= h,
+			.hover	= over->hover,
+			.click	= over->click,
+			.user	= over->user,
+		};
+
+		if (over->aoi)
+			aoi_remove(over->aois, over->aoi);
+		over->aoi = aoi_add(over->aois, &aoi);
+	}
+
 	*y += ext.height + OVER_SEP;
 }
 
 
-void overlay_draw_all(const struct overlay *overlays, cairo_t *cr)
+void overlay_draw_all(struct overlay *overlays, cairo_t *cr)
 {
-	const struct overlay *over;
+	struct overlay *over;
 	int x = OVER_X0;
 	int y = OVER_Y0;
 
@@ -92,7 +118,9 @@ void overlay_draw_all(const struct overlay *overlays, cairo_t *cr)
 }
 
 
-struct overlay *overlay_add(struct overlay **overlays, const char *s)
+struct overlay *overlay_add(struct overlay **overlays, const char *s,
+    struct aoi **aois,
+    bool (*hover)(void *user, bool on), void (*click)(void *user), void *user)
 {
 	struct overlay *over;
 	struct overlay **anchor;
@@ -100,6 +128,12 @@ struct overlay *overlay_add(struct overlay **overlays, const char *s)
 	over = alloc_type(struct overlay);
 	over->s = stralloc(s);
 
+	over->aois = aois;
+	over->hover = hover;
+	over->click = click;
+	over->user = user;
+	over->aoi = NULL;
+
 	for (anchor = overlays; *anchor; anchor = &(*anchor)->next);
 	over->next = NULL;
 	*anchor = over;
@@ -110,6 +144,8 @@ struct overlay *overlay_add(struct overlay **overlays, const char *s)
 
 static void overlay_free(struct overlay *over)
 {
+	if (over->aoi)
+		aoi_remove(over->aois, over->aoi);
 	free((void *) over->s);
 	free(over);
 }

eeshow/gui-over.h

@@ -13,14 +13,20 @@
 #ifndef GUI_OVER_H
 #define	GUI_OVER_H
 
+#include <stdbool.h>
+
 #include <cairo/cairo.h>
 
+#include "gui-aoi.h"
+
 
 struct overlay;
 
 
-void overlay_draw_all(const struct overlay *overlays, cairo_t *cr);
-struct overlay *overlay_add(struct overlay **overlays, const char *s);
+void overlay_draw_all(struct overlay *overlays, cairo_t *cr);
+struct overlay *overlay_add(struct overlay **overlays, const char *s,
+    struct aoi **aois,
+    bool (*hover)(void *user, bool on), void (*click)(void *user), void *user);
 void overlay_remove(struct overlay **overlays, struct overlay *over);
 void overlay_remove_all(struct overlay **overlays);
 

eeshow/gui.c

@@ -44,7 +44,7 @@ struct gui_sheet {
 	int w, h;
 	int xmin, ymin;
 
-	struct aoi *aois;	/* areas of interest */
+	struct aoi *aois;	/* areas of interest; in schematics coord  */
 
 	struct gui_sheet *prev;	/* previous in stack */
 
@@ -64,6 +64,7 @@ struct gui_ctx {
 	int pan_x, pan_y;
 
 	struct overlay *overlays;
+	struct aoi *aois;	/* areas of interest; in canvas coord  */
 
 	struct gui_sheet *curr_sheet;
 				/* current sheet */
@@ -248,6 +249,8 @@ static gboolean button_press_event(GtkWidget *widget, GdkEventButton *event,
 
 	switch (event->button) {
 	case 1:
+		if (aoi_click(ctx->aois, event->x, event->y))
+			break;
 		aoi_click(curr_sheet->aois,
 		    x + curr_sheet->xmin, y + curr_sheet->ymin);
 		break;
@@ -367,6 +370,16 @@ struct sheet_aoi_ctx {
 };
 
 
+static void close_subsheet(void *user)
+{
+	struct gui_ctx *ctx = user;
+	const struct gui_sheet *curr_sheet = ctx->curr_sheet;
+
+	if (curr_sheet->prev)
+		set_sheet(ctx, curr_sheet->prev);
+}
+
+
 static void select_subsheet(void *user)
 {
 	const struct sheet_aoi_ctx *aoi_ctx = user;
@@ -378,7 +391,8 @@ static void select_subsheet(void *user)
 		if (sheet->sch == obj->u.sheet.sheet) {
 			sheet->prev = ctx->curr_sheet;
 			set_sheet(ctx, sheet);
-			overlay_add(&ctx->overlays, obj->u.sheet.name);
+			overlay_add(&ctx->overlays, obj->u.sheet.name,
+			    &ctx->aois, NULL, close_subsheet, ctx);
 			return;
 		}
 	abort();
@@ -454,6 +468,7 @@ int gui(const struct sheet *sheets)
 		.zoom		= 4,	/* scale by 1 / 16 */
 		.panning	= 0,
 		.overlays	= NULL,
+		.aois		= NULL,
 	};
 
 	get_sheets(&ctx, sheets);