Added functionality for using TKEY in the action windows

to change the Ipo type (constant/linear/bezier) for the Ipo curves
owned by the selected channels

source/blender/include/BSE_editipo.h

@@ -131,6 +131,7 @@ void sampledata_to_ipocurve(float *data, int sfra, int efra, struct IpoCurve *ic
 void ipo_record(void);    
 
 void sethandles_ipo_keys(struct Ipo *ipo, int code);
+void setipotype_ipo(struct Ipo *ipo, int code);
 void set_ipo_key_selection(struct Ipo *ipo, int sel);
 int is_ipo_key_selected(struct Ipo *ipo);
 void delete_ipo_keys(struct Ipo *ipo);

source/blender/src/editaction.c

@@ -1338,6 +1338,43 @@ static void sethandles_actionchannel_keys(int code)
 	allqueue(REDRAWNLA, 0);
 }
 
+static void set_ipotype_actionchannels(void) {
+
+	bAction *act; 
+	bActionChannel *chan;
+	short event;
+
+	/* Get the selected action, exit if none are selected 
+	 */
+	act = G.saction->action;
+	if (!act)
+		return;
+
+	/* Present a popup menu asking the user what type
+	 * of IPO curve he/she/GreenBTH wants. ;)
+	 */
+	event= pupmenu("Channel Ipo Type %t|Constant %x1|Linear %x2|Bezier %x3");
+	if(event < 1) return;
+	
+	/* Loop through the channels and for the selected ones set
+	 * the type for each Ipo curve in the channel Ipo (based on
+	 * the value from the popup).
+	 */
+	for (chan = act->chanbase.first; chan; chan=chan->next){
+		if (chan->flag & ACHAN_SELECTED){
+			if (chan->ipo)
+				setipotype_ipo(chan->ipo, event);
+		}
+	}
+
+	/* Clean up and redraw stuff
+	 */
+	remake_action_ipos (act);
+	allspace(REMAKEIPO, 0);
+	allqueue(REDRAWACTION, 0);
+	allqueue(REDRAWIPO, 0);
+	allqueue(REDRAWNLA, 0);
+}
 
 void winqreadactionspace(unsigned short event, short val, char ascii)
 {
@@ -1414,6 +1451,11 @@ void winqreadactionspace(unsigned short event, short val, char ascii)
 			else sethandles_actionchannel_keys(HD_ALIGN);
 			break;
  
+			/*** set the Ipo type  ***/
+		case TKEY:
+			set_ipotype_actionchannels();
+			break;
+
 		case BKEY:
 			borderselect_action();
 			break;

source/blender/src/editipo.c

@@ -2958,6 +2958,43 @@ void sethandles_ipo(int code)
 }
 
 
+void set_ipocurve_constant(struct IpoCurve *icu) {
+	/* Sets the type of the IPO curve to constant
+	 */
+	icu->ipo= IPO_CONST;
+}
+
+void set_ipocurve_linear(struct IpoCurve *icu) {
+	/* Sets the type of the IPO curve to linear
+	 */
+	icu->ipo= IPO_LIN;
+}
+
+void set_ipocurve_bezier(struct IpoCurve *icu) {
+	/* Sets the type of the IPO curve to bezier
+	 */
+	icu->ipo= IPO_BEZ;
+}
+
+
+void setipotype_ipo(Ipo *ipo, int code)
+{
+	/* Sets the type of the each ipo curve in the
+	 * Ipo to a value based on the code
+	 */
+	switch (code) {
+	case 1:
+		ipo_keys_bezier_loop(ipo, NULL, set_ipocurve_constant);
+		break;
+	case 2:
+		ipo_keys_bezier_loop(ipo, NULL, set_ipocurve_linear);
+		break;
+	case 3:
+		ipo_keys_bezier_loop(ipo, NULL, set_ipocurve_bezier);
+		break;
+	}
+}
+
 void set_ipotype()
 {
 	EditIpo *ei;