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Added SDL_HITTEST_RESIZE_*, and implemented for X11.

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@ileonte
ileonte committed Jun 5, 2014
1 parent b861efd commit 2d38a71a1f6c99e227039c1625fa154ed3ed2f6a
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Showing with 144 additions and 8 deletions.
  1. +8 −1 include/SDL_video.h
  2. +113 −6 src/video/x11/SDL_x11events.c
  3. +23 −1 test/testhittesting.c
9 include/SDL_video.h
View file
@@ -800,7 +800,14 @@ typedef enum
{
SDL_HITTEST_NORMAL, /**< Region is normal. No special properties. */
SDL_HITTEST_DRAGGABLE, /**< Region can drag entire window. */
/* !!! FIXME: resize enums here. */
SDL_HITTEST_RESIZE_TOPLEFT,
SDL_HITTEST_RESIZE_TOP,
SDL_HITTEST_RESIZE_TOPRIGHT,
SDL_HITTEST_RESIZE_RIGHT,
SDL_HITTEST_RESIZE_BOTTOMRIGHT,
SDL_HITTEST_RESIZE_BOTTOM,
SDL_HITTEST_RESIZE_BOTTOMLEFT,
SDL_HITTEST_RESIZE_LEFT
} SDL_HitTestResult;

/**
119 src/video/x11/SDL_x11events.c
View file
@@ -40,8 +40,40 @@

#include <stdio.h>

#ifndef _NET_WM_MOVERESIZE_SIZE_TOPLEFT
#define _NET_WM_MOVERESIZE_SIZE_TOPLEFT 0
#endif

#ifndef _NET_WM_MOVERESIZE_SIZE_TOP
#define _NET_WM_MOVERESIZE_SIZE_TOP 1
#endif

#ifndef _NET_WM_MOVERESIZE_SIZE_TOPRIGHT
#define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT 2
#endif

#ifndef _NET_WM_MOVERESIZE_SIZE_RIGHT
#define _NET_WM_MOVERESIZE_SIZE_RIGHT 3
#endif

#ifndef _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT 4
#endif

#ifndef _NET_WM_MOVERESIZE_SIZE_BOTTOM
#define _NET_WM_MOVERESIZE_SIZE_BOTTOM 5
#endif

#ifndef _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT 6
#endif

#ifndef _NET_WM_MOVERESIZE_SIZE_LEFT
#define _NET_WM_MOVERESIZE_SIZE_LEFT 7
#endif

#ifndef _NET_WM_MOVERESIZE_MOVE
#define _NET_WM_MOVERESIZE_MOVE 8
#define _NET_WM_MOVERESIZE_MOVE 8
#endif

typedef struct {
@@ -290,7 +322,7 @@ InitiateWindowMove(_THIS, const SDL_WindowData *data, const SDL_Point *point)
XEvent evt;
evt.xclient.type = ClientMessage;
evt.xclient.window = data->xwindow;
evt.xclient.message_type = X11_XInternAtom(display, "_NET_WM_MOVERESIZE", False);
evt.xclient.message_type = X11_XInternAtom(display, "_NET_WM_MOVERESIZE", True);
evt.xclient.format = 32;
evt.xclient.data.l[0] = window->x + point->x;
evt.xclient.data.l[1] = window->y + point->y;
@@ -302,21 +334,96 @@ InitiateWindowMove(_THIS, const SDL_WindowData *data, const SDL_Point *point)
X11_XSync(display, 0);
}

static void
InitiateWindowResize(_THIS, const SDL_WindowData *data, const SDL_Point *point, int direction)
{
SDL_VideoData *viddata = (SDL_VideoData *) _this->driverdata;
SDL_Window* window = data->window;
Display *display = viddata->display;

if (direction < _NET_WM_MOVERESIZE_SIZE_TOPLEFT || direction > _NET_WM_MOVERESIZE_SIZE_LEFT)
return;

/* !!! FIXME: we need to regrab this if necessary when the drag is done. */
X11_XUngrabPointer(display, 0L);
X11_XFlush(display);

XEvent evt;
evt.xclient.type = ClientMessage;
evt.xclient.window = data->xwindow;
evt.xclient.message_type = X11_XInternAtom(display, "_NET_WM_MOVERESIZE", True);
evt.xclient.format = 32;
evt.xclient.data.l[0] = window->x + point->x;
evt.xclient.data.l[1] = window->y + point->y;
evt.xclient.data.l[2] = direction;
evt.xclient.data.l[3] = Button1;
evt.xclient.data.l[4] = 0;
X11_XSendEvent(display, DefaultRootWindow(display), False, SubstructureRedirectMask | SubstructureNotifyMask, &evt);

X11_XSync(display, 0);
}

static SDL_bool
ProcessHitTest(_THIS, const SDL_WindowData *data, const XEvent *xev)
{
SDL_Window *window = data->window;
SDL_bool ret = SDL_FALSE;

if (window->hit_test) {
const SDL_Point point = { xev->xbutton.x, xev->xbutton.y };
const SDL_HitTestResult rc = window->hit_test(window, &point, window->hit_test_data);
if (rc == SDL_HITTEST_DRAGGABLE) {
InitiateWindowMove(_this, data, &point);
return SDL_TRUE; /* dragging, drop this event. */
switch (rc) {
case SDL_HITTEST_DRAGGABLE: {
InitiateWindowMove(_this, data, &point);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_TOPLEFT: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_TOPLEFT);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_TOP: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_TOP);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_TOPRIGHT: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_TOPRIGHT);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_RIGHT: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_RIGHT);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_BOTTOMRIGHT: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_BOTTOM: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_BOTTOM);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_BOTTOMLEFT: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT);
ret = SDL_TRUE;
}
break;
case SDL_HITTEST_RESIZE_LEFT: {
InitiateWindowResize(_this, data, &point, _NET_WM_MOVERESIZE_SIZE_LEFT);
ret = SDL_TRUE;
}
break;
default:
break;
}
}

return SDL_FALSE; /* not a drag area. */
return ret;
}

static void
24 test/testhittesting.c
View file
@@ -3,6 +3,8 @@

/* !!! FIXME: rewrite this to be wired in to test framework. */

#define RESIZE_BORDER 20

const SDL_Rect drag_areas[] = {
{ 20, 20, 100, 100 },
{ 200, 70, 100, 100 },
@@ -16,13 +18,33 @@ static SDL_HitTestResult
hitTest(SDL_Window *window, const SDL_Point *pt, void *data)
{
int i;
int w, h;

for (i = 0; i < numareas; i++) {
if (SDL_PointInRect(pt, &areas[i])) {
SDL_Log("HIT-TEST: DRAGGABLE\n");
return SDL_HITTEST_DRAGGABLE;
}
}

SDL_GetWindowSize(window, &w, &h);
if (pt->x < RESIZE_BORDER && pt->y < RESIZE_BORDER)
return SDL_HITTEST_RESIZE_TOPLEFT;
if (pt->x > RESIZE_BORDER && pt->x < w - RESIZE_BORDER && pt->y < RESIZE_BORDER)
return SDL_HITTEST_RESIZE_TOP;
if (pt->x > w - RESIZE_BORDER && pt->y < RESIZE_BORDER)
return SDL_HITTEST_RESIZE_TOPRIGHT;
if (pt->x > w - RESIZE_BORDER && pt->y > RESIZE_BORDER && pt->y < h - RESIZE_BORDER)
return SDL_HITTEST_RESIZE_RIGHT;
if (pt->x > w - RESIZE_BORDER && pt->y > h - RESIZE_BORDER)
return SDL_HITTEST_RESIZE_BOTTOMRIGHT;
if (pt->x < w - RESIZE_BORDER && pt->x > RESIZE_BORDER && pt->y > h - RESIZE_BORDER)
return SDL_HITTEST_RESIZE_BOTTOM;
if (pt->x < RESIZE_BORDER && pt->y > h - RESIZE_BORDER)
return SDL_HITTEST_RESIZE_BOTTOMLEFT;
if (pt->x < RESIZE_BORDER && pt->y < h - RESIZE_BORDER && pt->y > RESIZE_BORDER)
return SDL_HITTEST_RESIZE_LEFT;

SDL_Log("HIT-TEST: NORMAL\n");
return SDL_HITTEST_NORMAL;
}
@@ -36,7 +58,7 @@ int main(int argc, char **argv)

/* !!! FIXME: check for errors. */
SDL_Init(SDL_INIT_VIDEO);
window = SDL_CreateWindow("Drag the red boxes", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_BORDERLESS);
window = SDL_CreateWindow("Drag the red boxes", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_BORDERLESS | SDL_WINDOW_RESIZABLE);
renderer = SDL_CreateRenderer(window, -1, 0);

if (SDL_SetWindowHitTest(window, hitTest, NULL) == -1) {

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