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- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright 2011 Pierre Ossman <ossman@cendio.se> for Cendio AB
- *
- * This 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 software 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 software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #include <assert.h>
- #include <stdio.h>
- #include <string.h>
-
- #include <rfb/LogWriter.h>
- #include <rfb/CMsgWriter.h>
-
- #include "DesktopWindow.h"
- #include "OptionsDialog.h"
- #include "i18n.h"
- #include "parameters.h"
- #include "vncviewer.h"
- #include "CConn.h"
- #include "Viewport.h"
-
- #include <FL/Fl.H>
- #include <FL/Fl_Scroll.H>
- #include <FL/x.H>
-
- #ifdef WIN32
- #include "win32.h"
- #endif
-
- #ifdef __APPLE__
- #include "cocoa.h"
- #endif
-
- #define EDGE_SCROLL_SIZE 32
- #define EDGE_SCROLL_SPEED 20
-
- using namespace rfb;
-
- static rfb::LogWriter vlog("DesktopWindow");
-
- DesktopWindow::DesktopWindow(int w, int h, const char *name,
- const rfb::PixelFormat& serverPF,
- CConn* cc_)
- : Fl_Window(w, h), cc(cc_), firstUpdate(true),
- delayedFullscreen(false), delayedDesktopSize(false)
- {
- scroll = new Fl_Scroll(0, 0, w, h);
- scroll->color(FL_BLACK);
-
- // Automatically adjust the scroll box to the window
- resizable(scroll);
-
- viewport = new Viewport(w, h, serverPF, cc);
-
- scroll->end();
-
- callback(handleClose, this);
-
- setName(name);
-
- OptionsDialog::addCallback(handleOptions, this);
-
- // Hack. See below...
- Fl::event_dispatch(&fltkHandle);
-
- // Support for -geometry option. Note that although we do support
- // negative coordinates, we do not support -XOFF-YOFF (ie
- // coordinates relative to the right edge / bottom edge) at this
- // time.
- int geom_x = 0, geom_y = 0;
- if (geometry.hasBeenSet()) {
- int matched;
- matched = sscanf(geometry.getValueStr(), "+%d+%d", &geom_x, &geom_y);
- if (matched == 2) {
- force_position(1);
- } else {
- int geom_w, geom_h;
- matched = sscanf(geometry.getValueStr(), "%dx%d+%d+%d", &geom_w, &geom_h, &geom_x, &geom_y);
- switch (matched) {
- case 4:
- force_position(1);
- /* fall through */
- case 2:
- w = geom_w;
- h = geom_h;
- break;
- default:
- geom_x = geom_y = 0;
- vlog.error("Invalid geometry specified!");
- }
- }
- }
-
- #ifdef __APPLE__
- // On OS X we can do the maximize thing properly before the
- // window is showned. Other platforms handled further down...
- if (maximize) {
- #ifdef HAVE_FLTK_WORK_AREA
- int dummy;
- Fl::screen_work_area(dummy, dummy, w, h, geom_x, geom_y);
- #else
- w = Fl::w();
- h = Fl::h();
- #endif
- }
- #endif
-
- if (force_position()) {
- resize(geom_x, geom_y, w, h);
- } else {
- size(w, h);
- }
-
- #ifdef HAVE_FLTK_FULLSCREEN
- if (fullScreen) {
- // Hack: Window managers seem to be rather crappy at respecting
- // fullscreen hints on initial windows. So on X11 we'll have to
- // wait until after we've been mapped.
- #if defined(WIN32) || defined(__APPLE__)
- fullscreen_on();
- #else
- delayedFullscreen = true;
- #endif
- }
- #endif
-
- show();
-
- // Full screen events are not sent out for a hidden window,
- // so send a fake one here to set up things properly.
- #ifdef HAVE_FLTK_FULLSCREEN
- if (fullscreen_active())
- handle(FL_FULLSCREEN);
- #endif
-
- // Unfortunately, current FLTK does not allow us to set the
- // maximized property on Windows and X11 before showing the window.
- // See STR #2083 and STR #2178
- #ifndef __APPLE__
- if (maximize) {
- maximizeWindow();
- }
- #endif
-
- // The window manager might give us an initial window size that is different
- // than the one we requested, and in those cases we need to manually adjust
- // the scroll widget for things to behave sanely.
- if ((w != this->w()) || (h != this->h()))
- scroll->size(this->w(), this->h());
-
- #ifdef HAVE_FLTK_FULLSCREEN
- if (delayedFullscreen) {
- // Hack: Fullscreen requests may be ignored, so we need a timeout for
- // when we should stop waiting. We also really need to wait for the
- // resize, which can come after the fullscreen event.
- Fl::add_timeout(0.5, handleFullscreenTimeout, this);
- fullscreen_on();
- }
- #endif
- }
-
-
- DesktopWindow::~DesktopWindow()
- {
- // Unregister all timeouts in case they get a change tro trigger
- // again later when this object is already gone.
- Fl::remove_timeout(handleGrab, this);
- Fl::remove_timeout(handleResizeTimeout, this);
- Fl::remove_timeout(handleFullscreenTimeout, this);
- Fl::remove_timeout(handleEdgeScroll, this);
-
- OptionsDialog::removeCallback(handleOptions);
-
- // FLTK automatically deletes all child widgets, so we shouldn't touch
- // them ourselves here
- }
-
-
- const rfb::PixelFormat &DesktopWindow::getPreferredPF()
- {
- return viewport->getPreferredPF();
- }
-
-
- void DesktopWindow::setName(const char *name)
- {
- CharArray windowNameStr;
- windowNameStr.replaceBuf(new char[256]);
-
- snprintf(windowNameStr.buf, 256, "%.240s - TigerVNC", name);
-
- copy_label(windowNameStr.buf);
- }
-
-
- rfb::ModifiablePixelBuffer* DesktopWindow::getFramebuffer(void)
- {
- return viewport->getFramebuffer();
- }
-
-
- // Copy the areas of the framebuffer that have been changed (damaged)
- // to the displayed window.
-
- void DesktopWindow::updateWindow()
- {
- if (firstUpdate) {
- if (cc->cp.supportsSetDesktopSize) {
- // Hack: Wait until we're in the proper mode and position until
- // resizing things, otherwise we might send the wrong thing.
- if (delayedFullscreen)
- delayedDesktopSize = true;
- else
- handleDesktopSize();
- }
- firstUpdate = false;
- }
-
- viewport->updateWindow();
- }
-
-
- void DesktopWindow::resizeFramebuffer(int new_w, int new_h)
- {
- if ((new_w == viewport->w()) && (new_h == viewport->h()))
- return;
-
- // If we're letting the viewport match the window perfectly, then
- // keep things that way for the new size, otherwise just keep things
- // like they are.
- #ifdef HAVE_FLTK_FULLSCREEN
- if (!fullscreen_active()) {
- #endif
- if ((w() == viewport->w()) && (h() == viewport->h()))
- size(new_w, new_h);
- else {
- // Make sure the window isn't too big. We do this manually because
- // we have to disable the window size restriction (and it isn't
- // entirely trustworthy to begin with).
- if ((w() > new_w) || (h() > new_h))
- size(__rfbmin(w(), new_w), __rfbmin(h(), new_h));
- }
- #ifdef HAVE_FLTK_FULLSCREEN
- }
- #endif
-
- viewport->size(new_w, new_h);
-
- // We might not resize the main window, so we need to manually call this
- // to make sure the viewport is centered.
- repositionViewport();
-
- // repositionViewport() makes sure the scroll widget notices any changes
- // in position, but it might be just the size that changes so we also
- // need a poke here as well.
- redraw();
- }
-
-
- void DesktopWindow::setCursor(int width, int height, const Point& hotspot,
- void* data, void* mask)
- {
- viewport->setCursor(width, height, hotspot, data, mask);
- }
-
-
- void DesktopWindow::resize(int x, int y, int w, int h)
- {
- bool resizing;
-
- #if ! (defined(WIN32) || defined(__APPLE__))
- // X11 window managers will treat a resize to cover the entire
- // monitor as a request to go full screen. Make sure we avoid this.
- #ifdef HAVE_FLTK_FULLSCREEN
- if (!fullscreen_active())
- #endif
- {
- bool resize_req;
-
- // If there is no X11 window, then this must be a resize request,
- // not a notification from the X server.
- if (!shown())
- resize_req = true;
- else {
- // Otherwise we need to get the real window coordinates to tell
- // the difference
- XWindowAttributes actual;
- Window cr;
- int wx, wy;
-
- XGetWindowAttributes(fl_display, fl_xid(this), &actual);
- XTranslateCoordinates(fl_display, fl_xid(this), actual.root,
- 0, 0, &wx, &wy, &cr);
-
- // Actual resize request?
- if ((wx != x) || (wy != y) ||
- (actual.width != w) || (actual.height != h))
- resize_req = true;
- else
- resize_req = false;
- }
-
- if (resize_req) {
- for (int i = 0;i < Fl::screen_count();i++) {
- int sx, sy, sw, sh;
-
- Fl::screen_xywh(sx, sy, sw, sh, i);
-
- if ((sx == x) && (sy == y) && (sw == w) && (sh == h)) {
- vlog.info("Adjusting window size to avoid accidental full screen request");
- // Assume a panel of some form and adjust the height
- y += 20;
- h -= 40;
- }
- }
- }
- }
- #endif
-
- if ((this->w() != w) || (this->h() != h))
- resizing = true;
- else
- resizing = false;
-
- Fl_Window::resize(x, y, w, h);
-
- if (resizing) {
- // Try to get the remote size to match our window size, provided
- // the following conditions are true:
- //
- // a) The user has this feature turned on
- // b) The server supports it
- // c) We're not still waiting for a chance to handle DesktopSize
- // d) We're not still waiting for startup fullscreen to kick in
- //
- if (not firstUpdate and not delayedFullscreen and
- ::remoteResize and cc->cp.supportsSetDesktopSize) {
- // We delay updating the remote desktop as we tend to get a flood
- // of resize events as the user is dragging the window.
- Fl::remove_timeout(handleResizeTimeout, this);
- Fl::add_timeout(0.5, handleResizeTimeout, this);
- }
-
- // Deal with some scrolling corner cases
- repositionViewport();
- }
- }
-
-
- int DesktopWindow::handle(int event)
- {
- switch (event) {
- #ifdef HAVE_FLTK_FULLSCREEN
- case FL_FULLSCREEN:
- fullScreen.setParam(fullscreen_active());
-
- if (fullscreen_active())
- scroll->type(0);
- else
- scroll->type(Fl_Scroll::BOTH);
-
- // The scroll widget isn't clever enough to actually redraw the
- // scroll bars when they are added/removed, so we need to give
- // it a push.
- scroll->redraw();
-
- if (!fullscreenSystemKeys)
- break;
-
- if (fullscreen_active())
- grabKeyboard();
- else
- ungrabKeyboard();
-
- break;
-
- case FL_ENTER:
- case FL_LEAVE:
- case FL_DRAG:
- case FL_MOVE:
- if (fullscreen_active()) {
- if (((viewport->x() < 0) && (Fl::event_x() < EDGE_SCROLL_SIZE)) ||
- ((viewport->x() + viewport->w() > w()) && (Fl::event_x() > w() - EDGE_SCROLL_SIZE)) ||
- ((viewport->y() < 0) && (Fl::event_y() < EDGE_SCROLL_SIZE)) ||
- ((viewport->y() + viewport->h() > h()) && (Fl::event_y() > h() - EDGE_SCROLL_SIZE))) {
- if (!Fl::has_timeout(handleEdgeScroll, this))
- Fl::add_timeout(0.1, handleEdgeScroll, this);
- }
- }
- // Continue processing so that the viewport also gets mouse events
- break;
- #endif
-
- case FL_SHORTCUT:
- // Sometimes the focus gets out of whack and we fall through to the
- // shortcut dispatching. Try to make things sane again...
- if (Fl::focus() == NULL) {
- take_focus();
- Fl::handle(FL_KEYDOWN, this);
- }
- return 1;
- }
-
- return Fl_Window::handle(event);
- }
-
-
- int DesktopWindow::fltkHandle(int event, Fl_Window *win)
- {
- int ret;
-
- ret = Fl::handle_(event, win);
-
- #ifdef HAVE_FLTK_FULLSCREEN
- // This is hackish and the result of the dodgy focus handling in FLTK.
- // The basic problem is that FLTK's view of focus and the system's tend
- // to differ, and as a result we do not see all the FL_FOCUS events we
- // need. Fortunately we can grab them here...
-
- DesktopWindow *dw = dynamic_cast<DesktopWindow*>(win);
-
- if (dw && fullscreenSystemKeys) {
- switch (event) {
- case FL_FOCUS:
- // FIXME: We reassert the keyboard grabbing on focus as FLTK there are
- // some issues we need to work around:
- // a) Fl::grab(0) on X11 will release the keyboard grab for us.
- // b) Gaining focus on the system level causes FLTK to switch
- // window level on OS X.
- if (dw->fullscreen_active())
- dw->grabKeyboard();
- break;
-
- case FL_UNFOCUS:
- // FIXME: We need to relinquish control when the entire window loses
- // focus as it is very tied to this specific window on some
- // platforms and we want to be able to open subwindows.
- dw->ungrabKeyboard();
- break;
- }
- }
- #endif
-
- return ret;
- }
-
-
- void DesktopWindow::fullscreen_on()
- {
- #ifdef HAVE_FLTK_FULLSCREEN
- #ifdef HAVE_FLTK_FULLSCREEN_SCREENS
- if (not fullScreenAllMonitors)
- fullscreen_screens(-1, -1, -1, -1);
- else {
- int top, bottom, left, right;
- int top_y, bottom_y, left_x, right_x;
-
- int sx, sy, sw, sh;
-
- top = bottom = left = right = 0;
-
- Fl::screen_xywh(sx, sy, sw, sh, 0);
- top_y = sy;
- bottom_y = sy + sh;
- left_x = sx;
- right_x = sx + sw;
-
- for (int i = 1;i < Fl::screen_count();i++) {
- Fl::screen_xywh(sx, sy, sw, sh, i);
- if (sy < top_y) {
- top = i;
- top_y = sy;
- }
- if ((sy + sh) > bottom_y) {
- bottom = i;
- bottom_y = sy + sh;
- }
- if (sx < left_x) {
- left = i;
- left_x = sx;
- }
- if ((sx + sw) > right_x) {
- right = i;
- right_x = sx + sw;
- }
- }
-
- fullscreen_screens(top, bottom, left, right);
- }
- #endif // HAVE_FLTK_FULLSCREEN_SCREENS
-
- fullscreen();
- #endif // HAVE_FLTK_FULLSCREEN
- }
-
- void DesktopWindow::grabKeyboard()
- {
- // Grabbing the keyboard is fairly safe as FLTK reroutes events to the
- // correct widget regardless of which low level window got the system
- // event.
-
- // FIXME: Push this stuff into FLTK.
-
- #if defined(WIN32)
- int ret;
-
- ret = win32_enable_lowlevel_keyboard(fl_xid(this));
- if (ret != 0)
- vlog.error(_("Failure grabbing keyboard"));
- #elif defined(__APPLE__)
- int ret;
-
- ret = cocoa_capture_display(this,
- #ifdef HAVE_FLTK_FULLSCREEN_SCREENS
- fullScreenAllMonitors
- #else
- false
- #endif
- );
- if (ret != 0)
- vlog.error(_("Failure grabbing keyboard"));
- #else
- int ret;
-
- ret = XGrabKeyboard(fl_display, fl_xid(this), True,
- GrabModeAsync, GrabModeAsync, CurrentTime);
- if (ret) {
- if (ret == AlreadyGrabbed) {
- // It seems like we can race with the WM in some cases.
- // Try again in a bit.
- if (!Fl::has_timeout(handleGrab, this))
- Fl::add_timeout(0.500, handleGrab, this);
- } else {
- vlog.error(_("Failure grabbing keyboard"));
- }
- }
-
- // We also need to grab the pointer as some WMs like to grab buttons
- // combined with modifies (e.g. Alt+Button0 in metacity).
- ret = XGrabPointer(fl_display, fl_xid(this), True,
- ButtonPressMask|ButtonReleaseMask|
- ButtonMotionMask|PointerMotionMask,
- GrabModeAsync, GrabModeAsync,
- None, None, CurrentTime);
- if (ret)
- vlog.error(_("Failure grabbing mouse"));
- #endif
- }
-
-
- void DesktopWindow::ungrabKeyboard()
- {
- Fl::remove_timeout(handleGrab, this);
-
- #if defined(WIN32)
- win32_disable_lowlevel_keyboard(fl_xid(this));
- #elif defined(__APPLE__)
- cocoa_release_display(this);
- #else
- // FLTK has a grab so lets not mess with it
- if (Fl::grab())
- return;
-
- XUngrabPointer(fl_display, fl_event_time);
- XUngrabKeyboard(fl_display, fl_event_time);
- #endif
- }
-
-
- void DesktopWindow::handleGrab(void *data)
- {
- DesktopWindow *self = (DesktopWindow*)data;
-
- assert(self);
-
- #ifdef HAVE_FLTK_FULLSCREEN
- if (!fullscreenSystemKeys)
- return;
- if (!self->fullscreen_active())
- return;
-
- self->grabKeyboard();
- #endif
- }
-
-
- #define _NET_WM_STATE_ADD 1 /* add/set property */
- void DesktopWindow::maximizeWindow()
- {
- #if defined(WIN32)
- // We cannot use ShowWindow() in full screen mode as it will
- // resize things implicitly. Fortunately modifying the style
- // directly results in a maximized state once we leave full screen.
- #ifdef HAVE_FLTK_FULLSCREEN
- if (fullscreen_active()) {
- WINDOWINFO wi;
- wi.cbSize = sizeof(WINDOWINFO);
- GetWindowInfo(fl_xid(this), &wi);
- SetWindowLongPtr(fl_xid(this), GWL_STYLE, wi.dwStyle | WS_MAXIMIZE);
- } else
- #endif
- ShowWindow(fl_xid(this), SW_MAXIMIZE);
- #elif defined(__APPLE__)
- // OS X is somewhat strange and does not really have a concept of a
- // maximized window, so we can simply resize the window to the workarea.
- // Note that we shouldn't do this whilst in full screen as that will
- // incorrectly adjust things.
- #ifdef HAVE_FLTK_FULLSCREEN
- if (fullscreen_active())
- return;
- #endif
- int X, Y, W, H;
- #ifdef HAVE_FLTK_WORK_AREA
- Fl::screen_work_area(X, Y, W, H, this->x(), this->y());
- #else
- W = Fl::w();
- H = Fl::h();
- #endif
- size(W, H);
- #else
- // X11
- fl_open_display();
- Atom net_wm_state = XInternAtom (fl_display, "_NET_WM_STATE", 0);
- Atom net_wm_state_maximized_vert = XInternAtom (fl_display, "_NET_WM_STATE_MAXIMIZED_VERT", 0);
- Atom net_wm_state_maximized_horz = XInternAtom (fl_display, "_NET_WM_STATE_MAXIMIZED_HORZ", 0);
-
- XEvent e;
- e.xany.type = ClientMessage;
- e.xany.window = fl_xid(this);
- e.xclient.message_type = net_wm_state;
- e.xclient.format = 32;
- e.xclient.data.l[0] = _NET_WM_STATE_ADD;
- e.xclient.data.l[1] = net_wm_state_maximized_vert;
- e.xclient.data.l[2] = net_wm_state_maximized_horz;
- e.xclient.data.l[3] = 0;
- e.xclient.data.l[4] = 0;
- XSendEvent(fl_display, RootWindow(fl_display, fl_screen), 0, SubstructureNotifyMask | SubstructureRedirectMask, &e);
- #endif
- }
-
-
- void DesktopWindow::handleDesktopSize()
- {
- int width, height;
-
- if (sscanf(desktopSize.getValueStr(), "%dx%d", &width, &height) != 2)
- return;
-
- remoteResize(width, height);
- }
-
-
- void DesktopWindow::handleResizeTimeout(void *data)
- {
- DesktopWindow *self = (DesktopWindow *)data;
-
- assert(self);
-
- self->remoteResize(self->w(), self->h());
- }
-
-
- void DesktopWindow::remoteResize(int width, int height)
- {
- ScreenSet layout;
- ScreenSet::iterator iter;
-
- #ifdef HAVE_FLTK_FULLSCREEN
- if (!fullscreen_active() || (width > w()) || (height > h())) {
- #endif
- // In windowed mode (or the framebuffer is so large that we need
- // to scroll) we just report a single virtual screen that covers
- // the entire framebuffer.
-
- layout = cc->cp.screenLayout;
-
- // Not sure why we have no screens, but adding a new one should be
- // safe as there is nothing to conflict with...
- if (layout.num_screens() == 0)
- layout.add_screen(rfb::Screen());
- else if (layout.num_screens() != 1) {
- // More than one screen. Remove all but the first (which we
- // assume is the "primary").
-
- while (true) {
- iter = layout.begin();
- ++iter;
-
- if (iter == layout.end())
- break;
-
- layout.remove_screen(iter->id);
- }
- }
-
- // Resize the remaining single screen to the complete framebuffer
- layout.begin()->dimensions.tl.x = 0;
- layout.begin()->dimensions.tl.y = 0;
- layout.begin()->dimensions.br.x = width;
- layout.begin()->dimensions.br.y = height;
- #ifdef HAVE_FLTK_FULLSCREEN
- } else {
- int i;
- rdr::U32 id;
- int sx, sy, sw, sh;
- Rect viewport_rect, screen_rect;
-
- // In full screen we report all screens that are fully covered.
-
- viewport_rect.setXYWH(x() + (w() - width)/2, y() + (h() - height)/2,
- width, height);
-
- // If we can find a matching screen in the existing set, we use
- // that, otherwise we create a brand new screen.
- //
- // FIXME: We should really track screens better so we can handle
- // a resized one.
- //
- for (i = 0;i < Fl::screen_count();i++) {
- Fl::screen_xywh(sx, sy, sw, sh, i);
-
- // Check that the screen is fully inside the framebuffer
- screen_rect.setXYWH(sx, sy, sw, sh);
- if (!screen_rect.enclosed_by(viewport_rect))
- continue;
-
- // Adjust the coordinates so they are relative to our viewport
- sx -= viewport_rect.tl.x;
- sy -= viewport_rect.tl.y;
-
- // Look for perfectly matching existing screen...
- for (iter = cc->cp.screenLayout.begin();
- iter != cc->cp.screenLayout.end(); ++iter) {
- if ((iter->dimensions.tl.x == sx) &&
- (iter->dimensions.tl.y == sy) &&
- (iter->dimensions.width() == sw) &&
- (iter->dimensions.height() == sh))
- break;
- }
-
- // Found it?
- if (iter != cc->cp.screenLayout.end()) {
- layout.add_screen(*iter);
- continue;
- }
-
- // Need to add a new one, which means we need to find an unused id
- while (true) {
- id = rand();
- for (iter = cc->cp.screenLayout.begin();
- iter != cc->cp.screenLayout.end(); ++iter) {
- if (iter->id == id)
- break;
- }
-
- if (iter == cc->cp.screenLayout.end())
- break;
- }
-
- layout.add_screen(rfb::Screen(id, sx, sy, sw, sh, 0));
- }
-
- // If the viewport doesn't match a physical screen, then we might
- // end up with no screens in the layout. Add a fake one...
- if (layout.num_screens() == 0)
- layout.add_screen(rfb::Screen(0, 0, 0, width, height, 0));
- }
- #endif
-
- // Do we actually change anything?
- if ((width == cc->cp.width) &&
- (height == cc->cp.height) &&
- (layout == cc->cp.screenLayout))
- return;
-
- vlog.debug("Requesting framebuffer resize from %dx%d to %dx%d (%d screens)",
- cc->cp.width, cc->cp.height, width, height, layout.num_screens());
-
- if (!layout.validate(width, height)) {
- vlog.error("Invalid screen layout computed for resize request!");
- return;
- }
-
- cc->writer()->writeSetDesktopSize(width, height, layout);
- }
-
-
- void DesktopWindow::repositionViewport()
- {
- int new_x, new_y;
-
- // Deal with some scrolling corner cases:
- //
- // a) If the window is larger then the viewport, center the viewport.
- // b) If the window is smaller than the viewport, make sure there is
- // no wasted space on the sides.
- //
- // FIXME: Doesn't compensate for scroll widget size properly.
-
- new_x = viewport->x();
- new_y = viewport->y();
-
- if (w() > viewport->w())
- new_x = (w() - viewport->w()) / 2;
- else {
- if (viewport->x() > 0)
- new_x = 0;
- else if (w() > (viewport->x() + viewport->w()))
- new_x = w() - viewport->w();
- }
-
- // Same thing for y axis
- if (h() > viewport->h())
- new_y = (h() - viewport->h()) / 2;
- else {
- if (viewport->y() > 0)
- new_y = 0;
- else if (h() > (viewport->y() + viewport->h()))
- new_y = h() - viewport->h();
- }
-
- if ((new_x != viewport->x()) || (new_y != viewport->y())) {
- viewport->position(new_x, new_y);
-
- // The scroll widget does not notice when you move around child widgets,
- // so redraw everything to make sure things update.
- redraw();
- }
- }
-
- void DesktopWindow::handleClose(Fl_Widget *wnd, void *data)
- {
- exit_vncviewer();
- }
-
-
- void DesktopWindow::handleOptions(void *data)
- {
- DesktopWindow *self = (DesktopWindow*)data;
-
- #ifdef HAVE_FLTK_FULLSCREEN
- if (self->fullscreen_active() && fullscreenSystemKeys)
- self->grabKeyboard();
- else
- self->ungrabKeyboard();
-
- if (fullScreen && !self->fullscreen_active())
- self->fullscreen_on();
- else if (!fullScreen && self->fullscreen_active())
- self->fullscreen_off();
- #endif
- }
-
- void DesktopWindow::handleFullscreenTimeout(void *data)
- {
- DesktopWindow *self = (DesktopWindow *)data;
-
- assert(self);
-
- self->delayedFullscreen = false;
-
- if (self->delayedDesktopSize) {
- self->handleDesktopSize();
- self->delayedDesktopSize = false;
- }
- }
-
- void DesktopWindow::handleEdgeScroll(void *data)
- {
- #ifdef HAVE_FLTK_FULLSCREEN
- DesktopWindow *self = (DesktopWindow *)data;
-
- int mx, my;
- int dx, dy;
-
- assert(self);
-
- if (!self->fullscreen_active())
- return;
-
- mx = Fl::event_x();
- my = Fl::event_y();
-
- dx = dy = 0;
-
- // Clamp mouse position in case it is outside the window
- if (mx < 0)
- mx = 0;
- if (mx > self->w())
- mx = self->w();
- if (my < 0)
- my = 0;
- if (my > self->h())
- my = self->h();
-
- if ((self->viewport->x() < 0) && (mx < EDGE_SCROLL_SIZE))
- dx = EDGE_SCROLL_SPEED -
- EDGE_SCROLL_SPEED * mx / EDGE_SCROLL_SIZE;
- if ((self->viewport->x() + self->viewport->w() > self->w()) &&
- (mx > self->w() - EDGE_SCROLL_SIZE))
- dx = EDGE_SCROLL_SPEED * (self->w() - mx) / EDGE_SCROLL_SIZE -
- EDGE_SCROLL_SPEED;
- if ((self->viewport->y() < 0) && (my < EDGE_SCROLL_SIZE))
- dy = EDGE_SCROLL_SPEED -
- EDGE_SCROLL_SPEED * my / EDGE_SCROLL_SIZE;
- if ((self->viewport->y() + self->viewport->h() > self->h()) &&
- (my > self->h() - EDGE_SCROLL_SIZE))
- dy = EDGE_SCROLL_SPEED * (self->h() - my) / EDGE_SCROLL_SIZE -
- EDGE_SCROLL_SPEED;
-
- if ((dx == 0) && (dy == 0))
- return;
-
- // Make sure we don't move the viewport too much
- if (self->viewport->x() + dx > 0)
- dx = -self->viewport->x();
- if (self->viewport->x() + dx + self->viewport->w() < self->w())
- dx = self->w() - (self->viewport->x() + self->viewport->w());
- if (self->viewport->y() + dy > 0)
- dy = -self->viewport->y();
- if (self->viewport->y() + dy + self->viewport->h() < self->h())
- dy = self->h() - (self->viewport->y() + self->viewport->h());
-
- self->scroll->scroll_to(self->scroll->xposition() - dx, self->scroll->yposition() - dy);
-
- Fl::repeat_timeout(0.1, handleEdgeScroll, data);
- #endif
- }
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