Object selection from tuhopuu2:

Select All by Type / Select All by Layer

User info:
Found in (object mode) 3D View header menu > Select >
Select All by Type selects all objects on visible layers of a certain type
Select All by Layer selects all objects on a certain layer (visible / invisible)

These used together are useful for managing a complex scene, for example
quickly selecting all the lamps and moving them to a separate layer, or
selecting the contents of a layer without having to disrupt the view
configuration of visible/invisible layers.

Coder Info:
Added two functions in editview.c
void selectall_type(short obtype);
void selectall_layer(int layernum);

I committed both of these together since the code/changes are both
very similar.

2 files changed, 188 insertions, 1 deletions

diff --git a/source/blender/src/editview.c b/source/blender/src/editview.c
index 81813f7f837..0ebbe46e616 100644
--- a/source/blender/src/editview.c
+++ b/source/blender/src/editview.c
@@ -379,6 +379,48 @@ void deselectall(void)	/* is toggle */
 
 }
 
+/* selects all objects of a particular type, on currently visible layers */
+void selectall_type(short obtype) 
+{
+	Base *base;
+	
+	base= FIRSTBASE;
+	while(base) {
+		if((base->lay & G.vd->lay) && (base->object->type == obtype)) {
+			base->flag |= SELECT;
+			base->object->flag= base->flag;
+		}
+		base= base->next;
+	}
+
+	allqueue(REDRAWVIEW3D, 0);
+	allqueue(REDRAWDATASELECT, 0);
+	allqueue(REDRAWNLA, 0);
+	
+	countall();
+
+}
+/* selects all objects on a particular layer */
+void selectall_layer(int layernum) 
+{
+	Base *base;
+	
+	base= FIRSTBASE;
+	while(base) {
+		if (base->lay == (1<< (layernum -1))) {
+			base->flag |= SELECT;
+			base->object->flag= base->flag;
+		}
+		base= base->next;
+	}
+
+	allqueue(REDRAWVIEW3D, 0);
+	allqueue(REDRAWDATASELECT, 0);
+	allqueue(REDRAWNLA, 0);
+	
+	countall();
+
+}
 static void deselectall_except(Base *b)   /* deselect all except b */
 {
 	Base *base;
diff --git a/source/blender/src/header_view3d.c b/source/blender/src/header_view3d.c
index 7d4c134bb50..fb7d40e3de7 100644
--- a/source/blender/src/header_view3d.c
+++ b/source/blender/src/header_view3d.c
@@ -360,6 +360,149 @@ static uiBlock *view3d_viewmenu(void *arg_unused)
 	return block;
 }
 
+static void do_view3d_select_object_typemenu(void *arg, int event)
+{
+
+	extern void selectall_type(short obtype);
+	
+	switch(event) {
+	case 0: /* Mesh */
+		selectall_type(OB_MESH);
+		break;
+	case 1: /* Curve */
+		selectall_type(OB_CURVE);
+		break;
+	case 2: /* Surface */
+		selectall_type(OB_SURF);
+		break;
+	case 3: /* Meta */
+		selectall_type(OB_MBALL);
+		break;
+	case 4: /* Armature */
+		selectall_type(OB_ARMATURE);
+		break;
+	case 5: /* Lattice */
+		selectall_type(OB_LATTICE);
+		break;
+	case 6: /* Text */
+		selectall_type(OB_FONT);
+		break;
+	case 7: /* Empty */
+		selectall_type(OB_EMPTY);
+		break;
+	case 8: /* Camera */
+		selectall_type(OB_CAMERA);
+		break;
+	case 9: /* Lamp */
+		selectall_type(OB_LAMP);
+		break;
+	}
+	allqueue(REDRAWVIEW3D, 0);
+}
+
+static uiBlock *view3d_select_object_typemenu(void *arg_unused)
+{
+	uiBlock *block;
+	short xco= 0, yco = 20, menuwidth = 120;
+
+	block= uiNewBlock(&curarea->uiblocks, "view3d_select_object_typemenu", UI_EMBOSSP, UI_HELV, G.curscreen->mainwin);
+	uiBlockSetButmFunc(block, do_view3d_select_object_typemenu, NULL);
+	uiBlockSetCol(block, MENUCOL);
+
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Mesh",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 0, "");
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Curve",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 1, "");
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Surface",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 2, "");
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Meta",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 3, "");
+	
+	uiDefBut(block, SEPR, 0, "",			0, yco-=6, menuwidth, 6, NULL, 0.0, 0.0, 0, 0, "");
+	
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Armature",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 4, "");
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Lattice",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 5, "");
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Text",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 6, "");
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Empty",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 7, "");
+	
+	uiDefBut(block, SEPR, 0, "",			0, yco-=6, menuwidth, 6, NULL, 0.0, 0.0, 0, 0, "");
+	
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Camera",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 8, "");
+	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Lamp",		0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 9, "");
+	
+	uiBlockSetDirection(block, UI_RIGHT);
+	uiTextBoundsBlock(block, 60);
+	return block;
+}
+
+static void do_view3d_select_object_layermenu(void *arg, int event)
+{
+
+	extern void selectall_layer(int layernum);
+	
+	switch(event) {
+	case 0:
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+	case 5:
+	case 6:
+	case 7:
+	case 8:
+	case 9:
+	case 10:
+	case 11:
+	case 12:
+	case 13:
+	case 14:
+	case 15:
+	case 16:
+	case 17:
+	case 18:
+	case 19:
+	case 20:
+		selectall_layer(event);
+		break;
+	}
+	allqueue(REDRAWVIEW3D, 0);
+}
+
+static uiBlock *view3d_select_object_layermenu(void *arg_unused)
+{
+	uiBlock *block;
+	short xco= 0, yco = 20, menuwidth = 22;
+
+	block= uiNewBlock(&curarea->uiblocks, "view3d_select_object_layermenu", UI_EMBOSSP, UI_HELV, G.curscreen->mainwin);
+	uiBlockSetButmFunc(block, do_view3d_select_object_layermenu, NULL);
+	uiBlockSetCol(block, MENUCOL);
+
+	uiDefBut(block, BUTM, 1, "1",		xco, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 1, "");
+	uiDefBut(block, BUTM, 1, "2",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 2, "");
+	uiDefBut(block, BUTM, 1, "3",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 3, "");
+	uiDefBut(block, BUTM, 1, "4",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 4, "");
+	uiDefBut(block, BUTM, 1, "5",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 5, "");
+	xco += 6;
+	uiDefBut(block, BUTM, 1, "6",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 6, "");
+	uiDefBut(block, BUTM, 1, "7",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 7, "");
+	uiDefBut(block, BUTM, 1, "8",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 8, "");
+	uiDefBut(block, BUTM, 1, "9",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 9, "");
+	uiDefBut(block, BUTM, 1, "10",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 10, "");
+	xco = 0;
+	uiDefBut(block, BUTM, 1, "11",		xco, yco-=24, menuwidth, 19, NULL, 0.0, 0.0, 1, 11, "");
+	uiDefBut(block, BUTM, 1, "12",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 12, "");
+	uiDefBut(block, BUTM, 1, "13",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 13, "");
+	uiDefBut(block, BUTM, 1, "14",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 14, "");
+	uiDefBut(block, BUTM, 1, "15",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 15, "");
+	xco += 6;
+	uiDefBut(block, BUTM, 1, "16",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 16, "");
+	uiDefBut(block, BUTM, 1, "17",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 17, "");
+	uiDefBut(block, BUTM, 1, "18",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 18, "");
+	uiDefBut(block, BUTM, 1, "19",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 19, "");
+	uiDefBut(block, BUTM, 1, "20",		xco+=(menuwidth+1), yco, menuwidth, 19, NULL, 0.0, 0.0, 1, 20, "");
+	
+	uiBlockSetDirection(block, UI_RIGHT);
+	//uiTextBoundsBlock(block, 100);
+	return block;
+}
+
+
 static void do_view3d_select_objectmenu(void *arg, int event)
 {
 //	extern void borderselect(void);
@@ -397,7 +540,9 @@ static uiBlock *view3d_select_objectmenu(void *arg_unused)
 	uiDefBut(block, SEPR, 0, "",				0, yco-=6, menuwidth, 6, NULL, 0.0, 0.0, 0, 0, "");
 	
 	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Select/Deselect All|A",				0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 1, "");
-	
+	uiDefIconTextBlockBut(block, view3d_select_object_layermenu, NULL, ICON_RIGHTARROW_THIN, "Select All by Layer", 0, yco-=20, 120, 19, "");
+	uiDefIconTextBlockBut(block, view3d_select_object_typemenu, NULL, ICON_RIGHTARROW_THIN, "Select All by Type", 0, yco-=20, 120, 19, "");
+		
 	uiDefBut(block, SEPR, 0, "",				0, yco-=6, menuwidth, 6, NULL, 0.0, 0.0, 0, 0, "");
 	
 	uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Linked...|Shift L",				0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 1, 2, "");