Tracks curves fixes and improvements:

- Use proper poll functions for tracks curve operators.
- Darken frames outside of scene frame range in curves view.
- Implemented view all operator.
- Implemented jump to current frame operator.

source/blender/editors/space_clip/clip_graph_draw.c

@@ -47,6 +47,7 @@
 #include "ED_clip.h"
 
 #include "BIF_gl.h"
+#include "BIF_glutil.h"
 
 #include "WM_types.h"
 
@@ -120,6 +121,26 @@ static void draw_graph_cfra(SpaceClip *sc, ARegion *ar, Scene *scene)
 	glScalef(xscale, 1.0, 1.0);
 }
 
+static void draw_graph_sfra_efra(Scene *scene, View2D *v2d)
+{
+	UI_view2d_view_ortho(v2d);
+
+	/* currently clip editor supposes that editing clip length is equal to scene frame range */
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	glEnable(GL_BLEND);
+		glColor4f(0.0f, 0.0f, 0.0f, 0.4f);
+
+		glRectf(v2d->cur.xmin, v2d->cur.ymin, (float)SFRA, v2d->cur.ymax);
+		glRectf((float)EFRA, v2d->cur.ymin, v2d->cur.xmax, v2d->cur.ymax);
+	glDisable(GL_BLEND);
+
+	UI_ThemeColorShade(TH_BACK, -60);
+
+	/* thin lines where the actual frames are */
+	fdrawline((float)SFRA, v2d->cur.ymin, (float)SFRA, v2d->cur.ymax);
+	fdrawline((float)EFRA, v2d->cur.ymin, (float)EFRA, v2d->cur.ymax);
+}
+
 static void tracking_segment_point_cb(void *UNUSED(userdata), MovieTrackingTrack *UNUSED(track),
 			MovieTrackingMarker *marker, int UNUSED(coord), float val)
 {
@@ -255,6 +276,9 @@ void clip_draw_graph(SpaceClip *sc, ARegion *ar, Scene *scene)
 			draw_frame_curves(sc);
 	}
 
+	/* frame range */
+	draw_graph_sfra_efra(scene, v2d);
+
 	/* current frame */
 	draw_graph_cfra(sc, ar, scene);
 }

source/blender/editors/space_clip/clip_graph_ops.c

@@ -30,6 +30,7 @@
  */
 
 #include "DNA_object_types.h"	/* SELECT */
+#include "DNA_scene_types.h"
 
 #include "MEM_guardedalloc.h"
 
@@ -58,6 +59,19 @@
 
 /******************** common graph-editing utilities ********************/
 
+static int ED_space_clip_graph_poll(bContext *C)
+{
+	SpaceClip *sc = CTX_wm_space_clip(C);
+
+	if(sc && sc->clip) {
+		ARegion *ar = CTX_wm_region(C);
+
+		return ar->regiontype == RGN_TYPE_PREVIEW;
+	}
+
+	return 0;
+}
+
 typedef struct {
 	int action;
 } SelectUserData;
@@ -278,7 +292,7 @@ void CLIP_OT_graph_select(wmOperatorType *ot)
 	/* api callbacks */
 	ot->exec= select_exec;
 	ot->invoke= select_invoke;
-	ot->poll= ED_space_clip_poll;
+	ot->poll= ED_space_clip_graph_poll;
 
 	/* flags */
 	ot->flag= OPTYPE_UNDO;
@@ -357,8 +371,106 @@ void CLIP_OT_graph_delete_knot(wmOperatorType *ot)
 
 	/* api callbacks */
 	ot->exec= delete_knot_exec;
-	ot->poll= ED_space_clip_poll;
+	ot->poll= ED_space_clip_graph_poll;
 
 	/* flags */
 	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 }
+
+/******************** view all operator ********************/
+
+typedef struct {
+	float min, max;
+} ViewAllUserData;
+
+static void view_all_cb(void *userdata, MovieTrackingTrack *UNUSED(track), MovieTrackingMarker *UNUSED(marker),
+                        int UNUSED(coord), float val)
+{
+	ViewAllUserData *data = (ViewAllUserData *)userdata;
+
+	if(val < data->min) data->min = val;
+	if(val > data->max) data->max = val;
+}
+
+static int view_all_exec(bContext *C, wmOperator *UNUSED(op))
+{
+	Scene *scene = CTX_data_scene(C);
+	ARegion *ar = CTX_wm_region(C);
+	SpaceClip *sc = CTX_wm_space_clip(C);
+	View2D *v2d = &ar->v2d;
+	ViewAllUserData userdata;
+	float extra;
+
+	userdata.max = -FLT_MAX;
+	userdata.min = FLT_MAX;
+
+	clip_graph_tracking_values_iterate(sc, &userdata, view_all_cb, NULL, NULL);
+
+	/* set extents of view to start/end frames */
+	v2d->cur.xmin = (float)SFRA;
+	v2d->cur.xmax = (float)EFRA;
+
+	if (userdata.min < userdata.max) {
+		v2d->cur.ymin = userdata.min;
+		v2d->cur.ymax = userdata.max;
+	}
+	else {
+		v2d->cur.ymin = -10;
+		v2d->cur.ymax = 10;
+	}
+
+	/* we need an extra "buffer" factor on either side so that the endpoints are visible */
+	extra= 0.01f * (v2d->cur.xmax - v2d->cur.xmin);
+	v2d->cur.xmin -= extra;
+	v2d->cur.xmax += extra;
+
+	extra= 0.01f * (v2d->cur.ymax - v2d->cur.ymin);
+	v2d->cur.ymin -= extra;
+	v2d->cur.ymax += extra;
+
+	ED_region_tag_redraw(ar);
+
+	return OPERATOR_FINISHED;
+}
+
+void CLIP_OT_graph_view_all(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "View All";
+	ot->description = "View all curves in editor";
+	ot->idname = "CLIP_OT_graph_view_all";
+
+	/* api callbacks */
+	ot->exec = view_all_exec;
+	ot->poll = ED_space_clip_graph_poll;
+}
+
+/******************** jump to current frame operator ********************/
+
+static int jump_to_current_frame_exec(bContext *C, wmOperator *UNUSED(op))
+{
+	Scene *scene = CTX_data_scene(C);
+	ARegion *ar = CTX_wm_region(C);
+	View2D *v2d = &ar->v2d;
+	float extra = (v2d->cur.xmax - v2d->cur.xmin) / 2.0;
+
+	/* set extents of view to start/end frames */
+	v2d->cur.xmin = (float)CFRA - extra;
+	v2d->cur.xmax = (float)CFRA + extra;
+
+	ED_region_tag_redraw(ar);
+
+	return OPERATOR_FINISHED;
+}
+
+void CLIP_OT_graph_jump_to_current_frame(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Jump to current frame";
+	ot->description = "Jump to current frame";
+	ot->idname = "CLIP_OT_graph_jump_to_current_frame";
+
+	/* api callbacks */
+	ot->exec = jump_to_current_frame_exec;
+	ot->poll = ED_space_clip_graph_poll;
+}

source/blender/editors/space_clip/clip_intern.h

@@ -58,6 +58,8 @@ void clip_draw_graph(struct SpaceClip *sc, struct ARegion *ar, struct Scene *sce
 void CLIP_OT_graph_select(struct wmOperatorType *ot);
 void CLIP_OT_graph_delete_curve(struct wmOperatorType *ot);
 void CLIP_OT_graph_delete_knot(struct wmOperatorType *ot);
+void CLIP_OT_graph_view_all(struct wmOperatorType *ot);
+void CLIP_OT_graph_jump_to_current_frame(struct wmOperatorType *ot);
 
 /* clip_ops.c */
 void CLIP_OT_open(struct wmOperatorType *ot);

source/blender/editors/space_clip/space_clip.c

@@ -78,7 +78,7 @@ static void init_preview_region(const bContext *C, ARegion *ar)
 	ar->flag|= RGN_FLAG_HIDDEN;
 
 	ar->v2d.tot.xmin= 0.0f;
-	ar->v2d.tot.ymin= (float)scene->r.sfra - 10.0f;
+	ar->v2d.tot.ymin= -10.0f;
 	ar->v2d.tot.xmax= (float)scene->r.efra;
 	ar->v2d.tot.ymax= 10.0f;
 
@@ -373,6 +373,8 @@ static void clip_operatortypes(void)
 	WM_operatortype_append(CLIP_OT_graph_select);
 	WM_operatortype_append(CLIP_OT_graph_delete_curve);
 	WM_operatortype_append(CLIP_OT_graph_delete_knot);
+	WM_operatortype_append(CLIP_OT_graph_view_all);
+	WM_operatortype_append(CLIP_OT_graph_jump_to_current_frame);
 
 	/* object tracking */
 	WM_operatortype_append(CLIP_OT_tracking_object_new);
@@ -546,6 +548,10 @@ static void clip_keymap(struct wmKeyConfig *keyconf)
 	WM_keymap_add_item(keymap, "CLIP_OT_graph_delete_knot", DELKEY, KM_PRESS, KM_SHIFT, 0);
 	WM_keymap_add_item(keymap, "CLIP_OT_graph_delete_knot", XKEY, KM_PRESS, KM_SHIFT, 0);
 
+	/* view */
+	WM_keymap_add_item(keymap, "CLIP_OT_graph_view_all", HOMEKEY, KM_PRESS, 0, 0);
+	WM_keymap_add_item(keymap, "CLIP_OT_graph_jump_to_current_frame", PADPERIOD, KM_PRESS, 0, 0);
+
 	transform_keymap_for_space(keyconf, keymap, SPACE_CLIP);
 }