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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2010 Blender Foundation.
* All rights reserved.
*
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/windowmanager/intern/wm_dragdrop.c
* \ingroup wm
*
* Our own drag-and-drop, drag state and drop boxes.
*/
#include <string.h>
#include "DNA_windowmanager_types.h"
#include "DNA_screen_types.h"
#include "MEM_guardedalloc.h"
#include "BLT_translation.h"
#include "BLI_blenlib.h"
#include "BIF_gl.h"
#include "BIF_glutil.h"
#include "BKE_context.h"
#include "IMB_imbuf_types.h"
#include "UI_interface.h"
#include "UI_interface_icons.h"
#include "RNA_access.h"
#include "WM_api.h"
#include "WM_types.h"
#include "wm_event_system.h"
/* ****************************************************** */
static ListBase dropboxes = {NULL, NULL};
/* drop box maps are stored global for now */
/* these are part of blender's UI/space specs, and not like keymaps */
/* when editors become configurable, they can add own dropbox definitions */
typedef struct wmDropBoxMap {
struct wmDropBoxMap *next, *prev;
ListBase dropboxes;
short spaceid, regionid;
char idname[KMAP_MAX_NAME];
} wmDropBoxMap;
/* spaceid/regionid is zero for window drop maps */
ListBase *WM_dropboxmap_find(const char *idname, int spaceid, int regionid)
{
wmDropBoxMap *dm;
for (dm = dropboxes.first; dm; dm = dm->next)
if (dm->spaceid == spaceid && dm->regionid == regionid)
if (STREQLEN(idname, dm->idname, KMAP_MAX_NAME))
return &dm->dropboxes;
dm = MEM_callocN(sizeof(struct wmDropBoxMap), "dropmap list");
BLI_strncpy(dm->idname, idname, KMAP_MAX_NAME);
dm->spaceid = spaceid;
dm->regionid = regionid;
BLI_addtail(&dropboxes, dm);
return &dm->dropboxes;
}
wmDropBox *WM_dropbox_add(ListBase *lb, const char *idname, int (*poll)(bContext *, wmDrag *, const wmEvent *),
void (*copy)(wmDrag *, wmDropBox *))
{
wmDropBox *drop = MEM_callocN(sizeof(wmDropBox), "wmDropBox");
drop->poll = poll;
drop->copy = copy;
drop->ot = WM_operatortype_find(idname, 0);
drop->opcontext = WM_OP_INVOKE_DEFAULT;
if (drop->ot == NULL) {
MEM_freeN(drop);
printf("Error: dropbox with unknown operator: %s\n", idname);
return NULL;
}
WM_operator_properties_alloc(&(drop->ptr), &(drop->properties), idname);
BLI_addtail(lb, drop);
return drop;
}
void wm_dropbox_free(void)
{
wmDropBoxMap *dm;
for (dm = dropboxes.first; dm; dm = dm->next) {
wmDropBox *drop;
for (drop = dm->dropboxes.first; drop; drop = drop->next) {
if (drop->ptr) {
WM_operator_properties_free(drop->ptr);
MEM_freeN(drop->ptr);
}
}
BLI_freelistN(&dm->dropboxes);
}
BLI_freelistN(&dropboxes);
}
/* *********************************** */
/* note that the pointer should be valid allocated and not on stack */
wmDrag *WM_event_start_drag(struct bContext *C, int icon, int type, void *poin, double value, unsigned int flags)
{
wmWindowManager *wm = CTX_wm_manager(C);
wmDrag *drag = MEM_callocN(sizeof(struct wmDrag), "new drag");
/* keep track of future multitouch drag too, add a mousepointer id or so */
/* if multiple drags are added, they're drawn as list */
BLI_addtail(&wm->drags, drag);
drag->flags = flags;
drag->icon = icon;
drag->type = type;
if (type == WM_DRAG_PATH)
BLI_strncpy(drag->path, poin, FILE_MAX);
else
drag->poin = poin;
drag->value = value;
return drag;
}
void WM_event_drag_image(wmDrag *drag, ImBuf *imb, float scale, int sx, int sy)
{
drag->imb = imb;
drag->scale = scale;
drag->sx = sx;
drag->sy = sy;
}
void WM_drag_free(wmDrag *drag)
{
if ((drag->flags & WM_DRAG_FREE_DATA) && drag->poin) {
MEM_freeN(drag->poin);
}
MEM_freeN(drag);
}
void WM_drag_free_list(struct ListBase *lb)
{
wmDrag *drag;
while ((drag = BLI_pophead(lb))) {
WM_drag_free(drag);
}
}
static const char *dropbox_active(bContext *C, ListBase *handlers, wmDrag *drag, wmEvent *event)
{
wmEventHandler *handler = handlers->first;
for (; handler; handler = handler->next) {
if (handler->dropboxes) {
wmDropBox *drop = handler->dropboxes->first;
for (; drop; drop = drop->next) {
if (drop->poll(C, drag, event))
/* XXX Doing translation here might not be ideal, but later we have no more
* access to ot (and hence op context)... */
return RNA_struct_ui_name(drop->ot->srna);
}
}
}
return NULL;
}
/* return active operator name when mouse is in box */
static const char *wm_dropbox_active(bContext *C, wmDrag *drag, wmEvent *event)
{
wmWindow *win = CTX_wm_window(C);
ScrArea *sa = CTX_wm_area(C);
ARegion *ar = CTX_wm_region(C);
const char *name;
name = dropbox_active(C, &win->handlers, drag, event);
if (name) return name;
name = dropbox_active(C, &sa->handlers, drag, event);
if (name) return name;
name = dropbox_active(C, &ar->handlers, drag, event);
if (name) return name;
return NULL;
}
static void wm_drop_operator_options(bContext *C, wmDrag *drag, wmEvent *event)
{
wmWindow *win = CTX_wm_window(C);
const int winsize_x = WM_window_pixels_x(win);
const int winsize_y = WM_window_pixels_y(win);
/* for multiwin drags, we only do this if mouse inside */
if (event->x < 0 || event->y < 0 || event->x > winsize_x || event->y > winsize_y)
return;
drag->opname[0] = 0;
/* check buttons (XXX todo rna and value) */
if (UI_but_active_drop_name(C)) {
BLI_strncpy(drag->opname, IFACE_("Paste name"), sizeof(drag->opname));
}
else {
const char *opname = wm_dropbox_active(C, drag, event);
if (opname) {
BLI_strncpy(drag->opname, opname, sizeof(drag->opname));
// WM_cursor_modal_set(win, CURSOR_COPY);
}
// else
// WM_cursor_modal_restore(win);
/* unsure about cursor type, feels to be too much */
}
}
/* called in inner handler loop, region context */
void wm_drags_check_ops(bContext *C, wmEvent *event)
{
wmWindowManager *wm = CTX_wm_manager(C);
wmDrag *drag;
for (drag = wm->drags.first; drag; drag = drag->next) {
wm_drop_operator_options(C, drag, event);
}
}
/* ************** draw ***************** */
static void wm_drop_operator_draw(const char *name, int x, int y)
{
const uiFontStyle *fstyle = UI_FSTYLE_WIDGET;
const float col_fg[4] = {1.0f, 1.0f, 1.0f, 1.0f};
const float col_bg[4] = {0.0f, 0.0f, 0.0f, 0.2f};
UI_fontstyle_draw_simple_backdrop(fstyle, x, y, name, col_fg, col_bg);
}
static const char *wm_drag_name(wmDrag *drag)
{
switch (drag->type) {
case WM_DRAG_ID:
{
ID *id = drag->poin;
return id->name + 2;
}
case WM_DRAG_PATH:
case WM_DRAG_NAME:
return drag->path;
}
return "";
}
static void drag_rect_minmax(rcti *rect, int x1, int y1, int x2, int y2)
{
if (rect->xmin > x1)
rect->xmin = x1;
if (rect->xmax < x2)
rect->xmax = x2;
if (rect->ymin > y1)
rect->ymin = y1;
if (rect->ymax < y2)
rect->ymax = y2;
}
/* called in wm_draw.c */
/* if rect set, do not draw */
void wm_drags_draw(bContext *C, wmWindow *win, rcti *rect)
{
const uiFontStyle *fstyle = UI_FSTYLE_WIDGET;
wmWindowManager *wm = CTX_wm_manager(C);
wmDrag *drag;
const int winsize_y = WM_window_pixels_y(win);
int cursorx, cursory, x, y;
cursorx = win->eventstate->x;
cursory = win->eventstate->y;
if (rect) {
rect->xmin = rect->xmax = cursorx;
rect->ymin = rect->ymax = cursory;
}
/* XXX todo, multiline drag draws... but maybe not, more types mixed wont work well */
glEnable(GL_BLEND);
for (drag = wm->drags.first; drag; drag = drag->next) {
int iconsize = UI_DPI_ICON_SIZE;
int padding = 4 * UI_DPI_FAC;
/* image or icon */
if (drag->imb) {
x = cursorx - drag->sx / 2;
y = cursory - drag->sy / 2;
if (rect)
drag_rect_minmax(rect, x, y, x + drag->sx, y + drag->sy);
else {
glColor4f(1.0, 1.0, 1.0, 0.65); /* this blends texture */
glaDrawPixelsTexScaled(x, y, drag->imb->x, drag->imb->y, GL_RGBA, GL_UNSIGNED_BYTE, GL_NEAREST, drag->imb->rect, drag->scale, drag->scale);
}
}
else {
x = cursorx - 2 * padding;
y = cursory - 2 * UI_DPI_FAC;
if (rect)
drag_rect_minmax(rect, x, y, x + iconsize, y + iconsize);
else
UI_icon_draw_aspect(x, y, drag->icon, 1.0f / UI_DPI_FAC, 0.8);
}
/* item name */
if (drag->imb) {
x = cursorx - drag->sx / 2;
y = cursory - drag->sy / 2 - iconsize;
}
else {
x = cursorx + 10 * UI_DPI_FAC;
y = cursory + 1 * UI_DPI_FAC;
}
if (rect) {
int w = UI_fontstyle_string_width(fstyle, wm_drag_name(drag));
drag_rect_minmax(rect, x, y, x + w, y + iconsize);
}
else {
const unsigned char col[] = {255, 255, 255, 255};
UI_fontstyle_draw_simple(fstyle, x, y, wm_drag_name(drag), col);
}
/* operator name with roundbox */
if (drag->opname[0]) {
if (drag->imb) {
x = cursorx - drag->sx / 2;
if (cursory + drag->sy / 2 + padding + iconsize < winsize_y)
y = cursory + drag->sy / 2 + padding;
else
y = cursory - drag->sy / 2 - padding - iconsize - padding - iconsize;
}
else {
x = cursorx - 2 * padding;
if (cursory + iconsize + iconsize < winsize_y) {
y = (cursory + iconsize) + padding;
}
else {
y = (cursory - iconsize) - padding;
}
}
if (rect) {
int w = UI_fontstyle_string_width(fstyle, wm_drag_name(drag));
drag_rect_minmax(rect, x, y, x + w, y + iconsize);
}
else
wm_drop_operator_draw(drag->opname, x, y);
}
}
glDisable(GL_BLEND);
}
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