RNA:

* Added Particle wrapping patch by Roelf de Kock. It's not
  complete yet and I haven't reviewed it, but committing anyway,
  will get to it later.
* Added "Percentage" subtype for floats. Doesn't really do
  much besides making auto rna buttons into sliders rather than
  numeric inputs, but can later display in % rather than 0.0-1.0.

source/blender/editors/curve/editcurve.c

@@ -1077,7 +1077,7 @@ void CURVE_OT_set_weight(wmOperatorType *ot)
 	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 
 	/* properties */
-	RNA_def_float(ot->srna, "weight", 1.0f, 0.0f, 1.0f, "Weight", "", 0.0f, 1.0f);
+	RNA_def_float_percentage(ot->srna, "weight", 1.0f, 0.0f, 1.0f, "Weight", "", 0.0f, 1.0f);
 }
 
 /******************* set radius operator ******************/
@@ -4195,7 +4195,7 @@ void CURVE_OT_select_random(wmOperatorType *ot)
 	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 
 	/* properties */
-	RNA_def_float(ot->srna, "percent", 0.5f, 0.0f, 1.0f, "Percent", "Percentage of vertices to select randomly.", 0.0001f, 1.0f);
+	RNA_def_float_percentage(ot->srna, "percent", 0.5f, 0.0f, 1.0f, "Percent", "Percentage of vertices to select randomly.", 0.0001f, 1.0f);
 }
 
 /********************** select every nth *********************/

source/blender/editors/interface/interface_utils.c

@@ -249,6 +249,8 @@ uiBut *uiDefAutoButR(uiBlock *block, PointerRNA *ptr, PropertyRNA *prop, int ind
 				if(RNA_property_subtype(ptr, prop) == PROP_COLOR)
 					but= uiDefButR(block, COL, 0, name, x1, y1, x2, y2, ptr, propname, 0, 0, 0, -1, -1, NULL);
 			}
+			else if(RNA_property_subtype(ptr, prop) == PROP_PERCENTAGE)
+				but= uiDefButR(block, NUMSLI, 0, name, x1, y1, x2, y2, ptr, propname, index, 0, 0, -1, -1, NULL);
 			else
 				but= uiDefButR(block, NUM, 0, name, x1, y1, x2, y2, ptr, propname, index, 0, 0, -1, -1, NULL);
 			break;

source/blender/editors/mesh/editmesh_mods.c

@@ -3448,10 +3448,10 @@ void MESH_OT_select_random(wmOperatorType *ot)
 	ot->poll= ED_operator_editmesh;
 
 	/* flags */
-	ot->flag= OPTYPE_REGISTER/*|OPTYPE_UNDO*/;
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 	
 	/* props */
-	RNA_def_float(ot->srna, "percent", 0.5f, 0.0f, 1.0f, "Percent", "Percentage of vertices to select randomly.", 0.0001f, 1.0f);
+	RNA_def_float_percentage(ot->srna, "percent", 0.5f, 0.0f, 1.0f, "Percent", "Percentage of vertices to select randomly.", 0.0001f, 1.0f);
 }
 
 void editmesh_select_by_material(EditMesh *em, int index) 

source/blender/editors/object/object_edit.c

@@ -1770,7 +1770,7 @@ static int object_select_random_exec(bContext *C, wmOperator *op)
 {	
 	float percent;
 	
-	percent = RNA_float_get(op->ptr, "percent") / 100.0f;
+	percent = RNA_float_get(op->ptr, "percent");
 		
 	CTX_DATA_BEGIN(C, Base*, base, visible_bases) {
 		if ((!base->flag & SELECT && BLI_frand() < percent)) {
@@ -1798,7 +1798,7 @@ void OBJECT_OT_select_random(wmOperatorType *ot)
 	/* flags */
 	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 	
-	RNA_def_float(ot->srna, "percent", 50.0f, 0.0f, 100.0f, "Percent", "percentage of objects to randomly select", 0.01f, 100.0f);
+	RNA_def_float_percentage(ot->srna, "percent", 0.5f, 0.0f, 1.0f, "Percent", "percentage of objects to randomly select", 0.0001f, 1.0f);
 }
 
 /* ******** Clear object Translation *********** */

source/blender/editors/space_image/space_image.c

@@ -282,8 +282,6 @@ static void image_main_area_set_view2d(SpaceImage *sima, ARegion *ar, Scene *sce
 	float x1, y1, w, h;
 	int width, height, winx, winy;
 	
-	ED_space_image_size(sima, &width, &height);
-
 #if 0
 	if(image_preview_active(curarea, &width, &height));
 #endif
@@ -294,14 +292,18 @@ static void image_main_area_set_view2d(SpaceImage *sima, ARegion *ar, Scene *sce
 		ED_image_aspect(sima->image, &xuser_asp, &yuser_asp);
 		if(ibuf) {
 			width= ibuf->x*xuser_asp;
-			width= ibuf->y * yuser_asp;
+			height= ibuf->y*yuser_asp;
 		}
 		else if(sima->image->type==IMA_TYPE_R_RESULT) {
 			/* not very important, just nice */
 			width= (scene->r.xsch*scene->r.size)/100;
 			height= (scene->r.ysch*scene->r.size)/100;
 		}
+		else
+			ED_space_image_size(sima, &width, &height);
 	}
+	else
+		ED_space_image_size(sima, &width, &height);
 
 	w= width;
 	h= height;

source/blender/editors/uvedit/uvedit_unwrap_ops.c

@@ -390,7 +390,7 @@ void UV_OT_minimize_stretch(wmOperatorType *ot)
 
 	/* properties */
 	RNA_def_boolean(ot->srna, "fill_holes", 1, "Fill Holes", "Virtual fill holes in mesh before unwrapping, to better avoid overlaps and preserve symmetry.");
-	RNA_def_float(ot->srna, "blend", 0.0f, 0.0f, 1.0f, "Blend", "Blend factor between stretch minimized and original.", 0.0f, 1.0f);
+	RNA_def_float_percentage(ot->srna, "blend", 0.0f, 0.0f, 1.0f, "Blend", "Blend factor between stretch minimized and original.", 0.0f, 1.0f);
 	RNA_def_int(ot->srna, "iterations", 0, 0, INT_MAX, "Iterations", "Number of iterations to run, 0 is unlimited when run interactively.", 0, 100);
 }
 

source/blender/makesrna/RNA_define.h

@@ -87,6 +87,8 @@ PropertyRNA *RNA_def_float_rotation(StructRNA *srna, const char *identifier, int
 	float hardmin, float hardmax, const char *ui_name, const char *ui_description, float softmin, float softmax);
 PropertyRNA *RNA_def_float_array(StructRNA *srna, const char *identifier, int len, const float *default_value,
 	float hardmin, float hardmax, const char *ui_name, const char *ui_description, float softmin, float softmax);
+PropertyRNA *RNA_def_float_percentage(StructRNA *srna, const char *identifier, float default_value, float hardmin, float hardmax,
+	const char *ui_name, const char *ui_description, float softmin, float softmax);
 
 PropertyRNA *RNA_def_pointer_runtime(StructRNA *srna, const char *identifier, StructRNA *type,
 	const char *ui_name, const char *ui_description);

source/blender/makesrna/RNA_types.h

@@ -67,7 +67,8 @@ typedef enum PropertySubType {
 	PROP_VECTOR = 5,
 	PROP_MATRIX = 6,
 	PROP_ROTATION = 7,
-	PROP_NEVER_NULL = 8
+	PROP_NEVER_NULL = 8,
+	PROP_PERCENTAGE = 9
 } PropertySubType;
 
 typedef enum PropertyFlag {

source/blender/makesrna/intern/makesrna.c

@@ -959,6 +959,7 @@ static const char *rna_property_subtypename(PropertyType type)
 		case PROP_MATRIX: return "PROP_MATRIX";
 		case PROP_ROTATION: return "PROP_ROTATION";
 		case PROP_NEVER_NULL: return "PROP_NEVER_NULL";
+		case PROP_PERCENTAGE: return "PROP_PERCENTAGE";
 		default: return "PROP_UNKNOWN";
 	}
 }

source/blender/makesrna/intern/rna_ID.c

@@ -75,6 +75,7 @@ StructRNA *rna_ID_refine(PointerRNA *ptr)
 		case ID_NT: return &RNA_NodeTree;
 		case ID_ME: return &RNA_Mesh;
 		case ID_OB: return &RNA_Object;
+		case ID_PA: return &RNA_ParticleSettings;
 		case ID_SCE: return &RNA_Scene;
 		case ID_SCR: return &RNA_Screen;
 		case ID_SO: return &RNA_Sound;

source/blender/makesrna/intern/rna_define.c

@@ -584,6 +584,10 @@ PropertyRNA *RNA_def_property(StructRNA *srna, const char *identifier, int type,
 				fprop->softmin= 0.0f;
 				fprop->softmax= 1.0f;
 			}
+			else if(subtype == PROP_PERCENTAGE) {
+				fprop->softmin= fprop->hardmin= 0.0f;
+				fprop->softmax= fprop->hardmax= 1.0f;
+			}
 			else {
 				fprop->softmin= (subtype == PROP_UNSIGNED)? 0.0f: -10000.0f; /* rather arbitrary .. */
 				fprop->softmax= 10000.0f;
@@ -1712,6 +1716,20 @@ PropertyRNA *RNA_def_float_array(StructRNA *srna, const char *identifier, int le
 	return prop;
 }
 
+PropertyRNA *RNA_def_float_percentage(StructRNA *srna, const char *identifier, float default_value,
+	float hardmin, float hardmax, const char *ui_name, const char *ui_description, float softmin, float softmax)
+{
+	PropertyRNA *prop;
+	
+	prop= RNA_def_property(srna, identifier, PROP_FLOAT, PROP_PERCENTAGE);
+	RNA_def_property_float_default(prop, default_value);
+	if(hardmin != hardmax) RNA_def_property_range(prop, hardmin, hardmax);
+	RNA_def_property_ui_text(prop, ui_name, ui_description);
+	RNA_def_property_ui_range(prop, softmin, softmax, 1, 3);
+
+	return prop;
+}
+
 PropertyRNA *RNA_def_pointer_runtime(StructRNA *srna, const char *identifier, StructRNA *type,
 	const char *ui_name, const char *ui_description)
 {

source/blender/makesrna/intern/rna_main.c

@@ -242,7 +242,7 @@ void RNA_def_main(BlenderRNA *brna)
 		{"sounds", "ID", "rna_Main_sound_begin", "Sounds", "Sound datablocks."},
 		{"armatures", "Armature", "rna_Main_armature_begin", "Armatures", "Armature datablocks."},
 		{"actions", "Action", "rna_Main_action_begin", "Actions", "Action datablocks."},
-		{"particles", "ID", "rna_Main_particle_begin", "Particles", "Particle datablocks."},
+		{"particles", "ParticleSettings", "rna_Main_particle_begin", "Particles", "Particle datablocks."},
 		{NULL, NULL, NULL, NULL, NULL}};
 	int i;
 	

source/blender/makesrna/intern/rna_rna.c

@@ -532,6 +532,7 @@ static void rna_def_property(BlenderRNA *brna)
 		{PROP_MATRIX, "MATRIX", "Matrix", ""},
 		{PROP_ROTATION, "ROTATION", "Rotation", ""},
 		{PROP_NEVER_NULL, "NEVER_NULL", "Never Null", ""},
+		{PROP_PERCENTAGE, "PERCENTAGE", "Percentage", ""},
 		{0, NULL, NULL, NULL}};
 
 	srna= RNA_def_struct(brna, "Property", NULL);