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ede/efiler/EDE_FileIconView.cpp
Vedran Ljubovic 667b8f8856 Try very hard to find icon of different name/size if the exact match 
doesn't exist
2008-10-29 11:27:34 +00:00

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/*
* $Id$
*
* EDE FileView class
* Part of edelib.
* Copyright (c) 2005-2007 EDE Authors.
*
* This program is licenced under terms of the
* GNU General Public Licence version 2 or newer.
* See COPYING for details.
*/
#include "EDE_FileView.h"
#include <FL/Fl_Button.H>
#include <FL/filename.H> // for FL_PATH_MAX
#include <FL/fl_draw.H> // for fl_measure and drawing selection box
#include <FL/Fl_Shared_Image.H>
#include <FL/Fl_Window.H> // for window() used in ctor
#include <edelib/Nls.h>
#include <edelib/String.h>
#include <edelib/IconTheme.h>
#include <edelib/Debug.h>
// debugging help
#define DBG "FileIconView: "
// Dimensions
#define ICONW 70
#define ICONH 80
// Spacing to use between icons
#define ICON_SPACING 5
// Used to make edges of icons less sensitive to selection box, dnd and such
// (e.g. if selection laso only touches a widget with <5px, it will not be selected)
#define SELECTION_EDGE 5
// Sometimes I accidentaly "drag" an icon - don't want dnd to trigger
#define MIN_DISTANCE_FOR_DND 10
// size of editbox
#define EDITBOX_WIDTH (ICONW+50)
// --------------------------------------
//
// File renaming stuff
//
// --------------------------------------
// EditBox is displayed when renaming a file
// We subclass Fl_Input so we can handle keyboard
int FileIconView::EditBox::handle (int e) {
EDEBUG(DBG " Editbox handle(%d)\n", e);
FileIconView* view = (FileIconView*)parent();
// in FIV we handle FL_KEYDOWN and FL_KEYUP - they shouldn't be sent!
if ((e==FL_KEYBOARD || e==FL_KEYDOWN || e==FL_KEYUP) && visible()) {
int k = Fl::event_key();
if (Fl::event_key()==FL_Enter && visible()) {
view->hide_editbox();
view->finish_rename();
} else if (k==FL_Up || k==FL_Down || k==FL_Page_Up || k==FL_Page_Down) {
view->hide_editbox();
return 0; // let the view scroll
} else if (e==FL_KEYBOARD && (k==FL_F+2 || k==FL_Escape))
// FL_KEYUP will happen immediately after showing editbox
view->hide_editbox();
else
Fl_Input::handle(e);
return 1; // don't send keys to view
}
if (e==FL_MOUSEWHEEL && visible()) view->hide_editbox();
return Fl_Input::handle(e);
}
// show editbox at specified row and make the row "invisible" (bgcolor same as fgcolor)
void FileIconView::show_editbox(int row) {
if (!rename_callback_) return;
if (row<1 || row>children()) return; // nothing selected
Fl_Widget* w = child(row-1);
const char* label = w->label();
if (label[0]=='.' && label[1]=='.' && label[2]=='\0') return; // can't rename "go up" button
// unselect the icon with focus - it's prettier that way
select(row,0);
editbox_row=row;
// Copy filename to editbox
char* path_ = strdup(path(row));
if (path_[strlen(path_)-1] == '/') path_[strlen(path_)-1]='\0';
const char* filename = fl_filename_name(path_);
editbox_->value(filename);
free(path_);
// make the label "invisible"
w->labelcolor(FL_BACKGROUND2_COLOR);
// calculate location for editbox
// "Magic constants" here are just nice spacing
int X=w->x() + (w->w()/2) - (EDITBOX_WIDTH/2);
if (X<x()) X=x();
int Y=w->y() + edelib::ICON_SIZE_MEDIUM + 5;
int W=EDITBOX_WIDTH;
int H=FL_NORMAL_SIZE + 4;
EDEBUG(DBG"editbox (%d,%d,%d,%d) \n",X,Y,W,H);
editbox_->resize(X,Y,W,H);
editbox_->show();
editbox_->take_focus();
redraw();
w->redraw();
editbox_->redraw();
}
void FileIconView::hide_editbox() {
EDEBUG(DBG "hide_editbox()\n");
editbox_->hide();
// Make the edited row visible again
Fl_Widget* w = child(editbox_row-1);
w->labelcolor(FL_FOREGROUND_COLOR);
w->redraw(); // label will be updated by rename_callback, if necessary
}
// This is called to actually rename file (when user presses Enter in editbox)
void FileIconView::finish_rename() {
EDEBUG(DBG "finish_rename()\n");
rename_callback_(editbox_->value());
}
// ctor
#ifdef USE_FLU_WRAP_GROUP
FileIconView::FileIconView(int X, int Y, int W, int H, char*label) : Flu_Wrap_Group(X,Y,W,H,label)
#else
FileIconView::FileIconView(int X, int Y, int W, int H, char*label) : edelib::ExpandableGroup(X,Y,W,H,label)
#endif
{
end();
box(FL_DOWN_BOX);
color(FL_BACKGROUND2_COLOR);
#ifdef USE_FLU_WRAP_GROUP
spacing(ICON_SPACING,ICON_SPACING);
#endif
select_x1=select_y1=select_x2=select_y2=0;
focused=0;
m_selected = 0;
rename_callback_ = 0;
paste_callback_ = 0;
context_callback_ = 0;
editbox_ = new EditBox(0, 0, 0, 0);
window()->add(editbox_); // this is required to make editbox visible
editbox_->box(FL_BORDER_BOX);
editbox_->parent(this);
editbox_->hide();
}
// Try various names and sizes for icons
Fl_Image* FileIconView::try_icon(edelib::String icon_name) {
edelib::String icon_path;
edelib::String tmpname;
fprintf (stderr, "-- Trying %s\n", icon_name.c_str());
icon_path = edelib::IconTheme::get(icon_name.c_str(), edelib::ICON_SIZE_MEDIUM);
if (icon_path!="")
return Fl_Shared_Image::get(icon_path.c_str());
// Because edelib doesn't resample icons, we need to do that manually
icon_path = edelib::IconTheme::get(icon_name.c_str(),edelib::ICON_SIZE_SMALL);
if (icon_path=="") icon_path = edelib::IconTheme::get(icon_name.c_str(),edelib::ICON_SIZE_TINY);
if (icon_path=="") icon_path = edelib::IconTheme::get(icon_name.c_str(),edelib::ICON_SIZE_LARGE);
if (icon_path=="") icon_path = edelib::IconTheme::get(icon_name.c_str(),edelib::ICON_SIZE_HUGE);
if (icon_path=="") icon_path = edelib::IconTheme::get(icon_name.c_str(),edelib::ICON_SIZE_ENORMOUS);
if (icon_path!="") {
Fl_Image *temp = Fl_Shared_Image::get(icon_path.c_str());
if (temp) {
return temp->copy(edelib::ICON_SIZE_MEDIUM, edelib::ICON_SIZE_MEDIUM);
}
}
// Try Gnome icons
if (icon_name.substr(0,11) != "gnome-mime-") {
tmpname = "gnome-mime-";
tmpname += icon_name;
Fl_Image *tmpimage = try_icon(tmpname);
if (tmpimage) return tmpimage;
// Try generic icons without last part
if (icon_name.find('-',0) != edelib::String::npos) {
tmpname = icon_name.substr(0,icon_name.find('-',0));
tmpimage = try_icon(tmpname);
if (tmpimage) return tmpimage;
// Replace text with txt
if (tmpname == "text") {
tmpimage = try_icon("txt");
if (tmpimage) return tmpimage;
}
}
// No icon found for this mimetype, we're trying a generic "file" icon
// (in crystalsvg "misc" looks better...)
if (icon_name != "empty") {
return try_icon("empty");
}
}
// Not even generic icon is found :(
return 0;
}
// Methods for manipulating items
// They are named similarly to Browser methods, except that they take
// struct FileItem (defined in EDE_FileView.h)
void FileIconView::insert(int row, FileItem *item) {
// update list of selected[] items
if (!m_selected)
m_selected = (int*)malloc(sizeof(int)*(children()+1));
else
m_selected = (int*)realloc(m_selected,sizeof(int)*(children()+1));
m_selected[children()]=0;
Fl_Button* b = new Fl_Button(0,0,ICONW,ICONH);
// b->box(FL_RFLAT_BOX); // Rounded box - has bug with selection box
b->box(FL_FLAT_BOX);
b->color(FL_BACKGROUND2_COLOR);
b->align(FL_ALIGN_INSIDE|FL_ALIGN_CENTER|FL_ALIGN_CLIP);
// Set the label
char buffer[FL_PATH_MAX];
uint j=0;
for (uint i=0; i<item->name.length(); i++,j++) {
buffer[j] = item->name[i];
buffer[j+1] = '\0';
if (buffer[j] == '@') { // escape @
buffer[++j] = '@';
buffer[j+1] = '\0';
}
b->copy_label(buffer);
int lw =0, lh = 0;
fl_measure(b->label(), lw, lh);
if (lw>ICONW) {
if (j==i+2) { // already added 2 newlines
buffer[j-2]='.';
buffer[j-1]='.';
buffer[j]='.';
buffer[j+1]='\0';
j+=2;
break; // for
} else { // add newline
buffer[j+1]=buffer[j];
buffer[j]='\n';
buffer[j+2]='\0';
j++;
}
}
}
while (j<=item->name.length()+2){
buffer[j++]='\n';
//buffer[j++]='L';
}
buffer[j]='\0';
b->copy_label(buffer);
// Tooltip text
edelib::String tooltip = _("Name: ")+item->name;
if (item->size != "") tooltip += _("\nSize: ")+item->size;
tooltip += _("\nType: ")+item->description+_("\nDate: ")+item->date+_("\nPermissions: ")+item->permissions;
b->tooltip(strdup(tooltip.c_str()));
b->user_data(strdup(item->realpath.c_str()));
// Don't crash if try_icon returns nothing
Fl_Image *tmp = try_icon(item->icon);
if (tmp) b->image(tmp);
#ifdef USE_FLU_WRAP_GROUP
Flu_Wrap_Group::insert(*b,row);
#else
edelib::ExpandableGroup::insert(*b,row);
edelib::ExpandableGroup::handle(FL_SHOW); // This will force calling reposition_childs()
#endif
//insert(*b,row); -- why doesn't this work?
redraw();
}
void FileIconView::remove(FileItem *item) {
Fl_Widget* w = find_icon(item->realpath);
if (w) {
#ifdef USE_FLU_WRAP_GROUP
Flu_Wrap_Group::remove(*w); // note that FWG requires to dereference the pointer
#else
edelib::ExpandableGroup::remove(w);
#endif
//remove(w);
delete w;
}
}
void FileIconView::remove(int row) {
if (row<1 || row>children()) return;
Fl_Button* b = (Fl_Button*)child(row-1);
#ifdef USE_FLU_WRAP_GROUP
Flu_Wrap_Group::remove(*b); // note that FWG requires to dereference the pointer
#else
edelib::ExpandableGroup::remove(b);
#endif
//remove(b);
delete b;
}
void FileIconView::update(FileItem *item) {
Fl_Widget* w = find_icon(item->realpath);
if (!w) return;
// Tooltip text
edelib::String tooltip = _("Name: ")+item->name+_("\nSize: ")+item->size+_("\nType: ")+item->description+_("\nDate: ")+item->date+_("\nPermissions: ")+item->permissions;
w->tooltip(strdup(tooltip.c_str()));
// Don't crash if try_icon returns nothing
Fl_Image *tmp = try_icon(item->icon);
if (tmp) w->image(tmp);
w->redraw();
}
// This method is needed because update() uses path to find item in list
void FileIconView::update_path(const char* oldpath,const char* newpath) {
Fl_Widget* w = find_icon(oldpath);
if (!w) return;
w->user_data(strdup(newpath));
// Set the label
char buffer[FL_PATH_MAX];
const char* name = fl_filename_name(newpath);
uint j=0;
for (uint i=0; i<strlen(name); i++,j++) {
buffer[j] = name[i];
buffer[j+1] = '\0';
if (buffer[j] == '@') { // escape @
buffer[++j] = '@';
buffer[j+1] = '\0';
}
w->copy_label(buffer);
int lw =0, lh = 0;
fl_measure(w->label(), lw, lh);
if (lw>ICONW) {
if (j==i+2) { // already added 2 newlines
buffer[j-2]='.';
buffer[j-1]='.';
buffer[j]='.';
buffer[j+1]='\0';
j+=2;
break; // for
} else { // add newline
buffer[j+1]=buffer[j];
buffer[j]='\n';
buffer[j+2]='\0';
j++;
}
}
}
while (j<=strlen(name)+2){
buffer[j++]='\n';
//buffer[j++]='L';
}
buffer[j]='\0';
w->copy_label(buffer);
}
// Select item (if value==1) or unselect (if value==0)
// We are faking selection by manipulating fg & bg color
// TODO: create a new class for icons that should handle selection internally
void FileIconView::select(int row, int value) {
if (row<1 || row>children()) return;
if (!m_selected) return; // shouldn't happen
set_focus(row);
int i=0;
Fl_Button* b = (Fl_Button*)child(row-1);
if (value) {
while (m_selected[i++]!=0);
m_selected[i-1]=row;
b->color(FL_SELECTION_COLOR);
b->labelcolor(fl_contrast(FL_FOREGROUND_COLOR,FL_SELECTION_COLOR));
b->redraw();
} else {
while (m_selected[i]!=0) {
if (m_selected[i]==row) {
int j=i;
while (m_selected[j]!=0) {
m_selected[j]=m_selected[j+1];
j++;
}
break;
}
i++;
}
b->color(FL_BACKGROUND2_COLOR);
b->labelcolor(FL_FOREGROUND_COLOR);
b->redraw();
}
}
// Scroll the view until item becomes visible
void FileIconView::show_item(int row) {
EDEBUG(DBG"show_item(%d)\n", row);
if (row<1 || row>children()) return;
Fl_Button* b = (Fl_Button*)child(row-1);
#ifdef USE_FLU_WRAP_GROUP
Fl_Scrollbar* s = &scrollbar;
#else
Fl_Scrollbar* s = get_scroll();
#endif
// Flu_Wrap_Group::scroll_to() will scroll until icon is at the top of view
// I prefer that view is scrolled just enough so icon is visible
// FIXME: sometimes b->y() is so large that it wraps around and becomes positive
int scrollto=0;
if (b->y()+b->h() > y()+h())
scrollto = s->value() + (b->y()+b->h()-y()-h())+1;
else if (b->y() < y())
scrollto = s->value() - (y()-b->y());
if (scrollto) {
EDEBUG(DBG"by: %d bh: %d y: %d h: %d sv: %d\n", b->y(), b->h(), y(), h(), s->value());
#ifdef USE_FLU_WRAP_GROUP
((Fl_Valuator*)s)->value(scrollto);
redraw();
draw(); // we need to relayout the group so that b->y() value is updated for next call
#else
scrolly(scrollto); // ExpandableGroup method
#endif
}
}
// Overloaded handle() method
// it's currently a bit messy, see implementation comments for details
int FileIconView::handle(int e) {
//EDEBUG(DBG"Event %d\n",e);
// ------------------------------------------------
// Fixes for focus management
// ------------------------------------------------
// fltk provides focus management for members of Fl_Group, but it has minor problems:
// - after switching to another window and back, focused widget is forgotten
// - if no widget is focused, arrow keys will navigate outside group
// - Tab has same effect as right arrow - we want arrows to only be used inside
// group, and (Shift+)Tab to be used for going outside
if (Fl::focus()->inside(this)) { // is focus inside?
int k = Fl::event_key();
//EDEBUG(DBG"event_key: %d\n",k);
if (k==FL_Up || k==FL_Down || k==FL_Left || k==FL_Right) {
#ifdef USE_FLU_WRAP_GROUP
// Wrap around - FWG only (due to methods such as above())
// FL_KEYDOWN happens only if key is otherwise unhandled
if (e==FL_KEYDOWN) {
int x = get_focus()-1;
Fl_Widget* b = child(x);
Fl_Widget* b2;
switch(k) {
case FL_Up:
b2=above(b);
if (x==0) b2=child(children()-1);
break;
case FL_Down:
b2=below(b);
// Bug in Flu_Wrap_Group - inconsistent behavior of below():
if (b2==b) b2=child(children()-1);
if (x==children()-1) b2=child(0);
break;
case FL_Left:
b2=left(b);
if (x==0) b2=child(children()-1);
break;
case FL_Right:
b2=next(b);
if (x==children()-1) b2=child(0);
break;
default: // to silence compiler warnings
break;
}
for (int i=0; i<children(); i++)
if (b2==child(i)) set_focus(i+1);
return 1;
}
#else
// edelib::ExpandableGroup - Full keyboard navigation
if (e==FL_KEYDOWN) {
int x = get_focus();
// Wrap around
if ((k==FL_Up || k==FL_Left) && x==1)
set_focus(children());
else if ((k==FL_Down || k==FL_Right) && x==children())
set_focus(1);
// Left/right use item ordering
else if (k==FL_Left)
set_focus(x-1);
else if (k==FL_Right)
set_focus(x+1);
// Use widget x() && y() to find item above/below
// This isn't very elegant, but with ExpandableGroup there is no other way...
else {
Fl_Widget* w = child(x-1);
Fl_Widget* w2 = 0;
int dest=0;
for (int i=0; i<children(); i++) {
Fl_Widget* t=child(i);
if (k==FL_Up && t->x()==w->x() && t->y()<w->y())
if (!w2 || w2->y()<t->y()) {
w2=t;
dest=i+1;
}
if (k==FL_Down && t->x()==w->x() && t->y()>w->y())
if (!w2 || w2->y()>t->y()) {
w2=t;
dest=i+1;
}
}
if (w2)
set_focus(dest);
else { // nothing found
if (k==FL_Up)
set_focus(1);
else
set_focus(children());
}
}
return 1;
}
#endif
// Remember focus for restoring later
if (e==FL_KEYUP || e==FL_KEYBOARD) { // Sometimes only one of these is triggered
focused = get_focus();
if (!focused) {
// Nothing is focused - this is initial state
if (k==FL_Up || k==FL_Left)
set_focus(children());
else
set_focus(1);
} else
show_item(focused); // scroll follows focus
return 1; // Don't let fltk navigate to another widget
}
}
// Tab key should always navigate outside group
// NOTE: This code is ugly! I am ashamed...
if (e!=FL_NO_EVENT && e!=FL_KEYUP && k==FL_Tab) { // FL_NO_EVENT happens a lot
EDEBUG(DBG"TAB %d - focused: (%s)\n",e,Fl::focus()->label());
// Try to find another widget to give focus to.
// Because widgets can be *very* nested, we go straight
// to window()
Fl_Group* parent_=(Fl_Group*)window();
Fl_Widget* jumpto=0;
int i=0;
while (jumpto==0 && parent_!=this) {
jumpto=parent_->child(i);
EDEBUG(DBG" -- (%s)\n", jumpto->label());
if (this->inside(jumpto) || !jumpto->visible())
jumpto=0;
i++;
if (i==parent_->children()) {
int j;
for (j=0; j<parent_->children(); j++)
if (parent_->child(j)->visible()) break;
if (j==parent_->children()) {
// nothing is visible!?
EDEBUG(DBG"WTF!\n");
parent_=(Fl_Group*)this;
} else {
parent_=(Fl_Group*)parent_->child(j);
EDEBUG(DBG" -> [%s]\n", parent_->label()); // label everything to debug!!!
}
i=0;
}
if (jumpto!=0 && !jumpto->take_focus())
jumpto=0; // widget refused focus, keep searching
}
EDEBUG(DBG"[X]\n");
// if this is the only widget, do nothing
return 1;
}
} // if (Fl::focus()->inside(this)) ...
// Restore focused widget after losing focus
if (e==FL_FOCUS) {
if (focused) set_focus(focused);
}
/* ------------------------------
Rename support
--------------------------------- */
// If rename_callback_ isn't set, we don't support renaming
if (rename_callback_) {
// hide editbox when user clicks outside of it
if (e==FL_PUSH && editbox_->visible() && !Fl::event_inside(editbox_))
hide_editbox();
// hide editbox when scrolling mouse
if (e==FL_MOUSEWHEEL && editbox_->visible())
hide_editbox();
static bool renaming=false;
// this variable is used because we want to select item on FL_PUSH, but
// actually start editing on FL_RELEASE (otherwise it would be impossible
// to doubleclick)
if (e==FL_PUSH) { renaming=false;
EDEBUG(DBG"FL_PUSH\n");
}
// Click once on item that is already selected AND focused to rename it
if (e==FL_PUSH && !editbox_->visible() && Fl::event_clicks()==0 && Fl::event_button()==1) {
EDEBUG(DBG"start rename\n");
// allow to click for focusing
if (!Fl::focus()->inside(this)) return 1;
// Is click inside a label?
int clicked=0;
for (int i=0; i<children(); i++) {
Fl_Widget* w = child(i);
int X=Fl::event_x(); int Y=Fl::event_y();
if (X>w->x() && X<w->x()+w->w() && Y>w->y()+edelib::ICON_SIZE_MEDIUM && Y<w->y()+w->h())
{ clicked=i+1; break; }
}
// Is clicked item selected and focused?
if (clicked && get_focus()==clicked && selected(clicked)) {
renaming=true; // On next event, we will check if it's doubleclick
} // otherwise, let the event become select/focus event
EDEBUG(DBG"clicked: %d \n",clicked);
if (renaming) EDEBUG(DBG"renaming!\n");
}
if (renaming && (e==FL_RELEASE || e==FL_MOVE) && Fl::event_is_click()!=0 && Fl::event_clicks()==0) {
EDEBUG(DBG"stop rename\n");
// Fl::event_is_click() will be ==0 on drag
// Fl::event_clicks() will be >0 on doubleclick
show_editbox(get_focus());
renaming=false;
// don't pass mouse event, otherwise item will become reselected which is a bit ugly
return 1;
}
}
// ------------------------------------------------
// Make Fl_Group behave like proper widget
// ------------------------------------------------
// We accept focus (this defaults to 0 with FL_GROUP)
if (e==FL_FOCUS) return 1;
// We accept mouse clicks as long as they're inside
if (e==FL_PUSH && Fl::event_x()>x() && Fl::event_x() < x()+w()-Fl::scrollbar_size()) return 1;
// Do callback on enter key
// (because icons don't have callbacks)
if (e==FL_KEYBOARD && Fl::event_key()==FL_Enter) {
do_callback();
return 1;
}
// Select/unselect toggle using SPACE
if ((e==FL_KEYBOARD || e==FL_KEYUP) && Fl::event_key()==' ') {
if (selected(get_focus()))
select(get_focus(),0);
else
select(get_focus(),1);
return 1;
}
// ------------------------------------------------
// FL_DRAG does two things: laso and dnd
// ------------------------------------------------
// "laso" a.k.a. selection box is common name for box used to select many widgets at once
static bool laso=false; // are we laso-ing?
static bool scrolling=false;
static int dragx,dragy; // to check for min dnd distance
if (e==FL_DRAG) {
EDEBUG(DBG"FL_DRAG! ");
// No laso is active, either start laso or start dnd operation
if (!laso) {
// Drag inside child is dnd
int ex=Fl::event_x(); int ey=Fl::event_y();
#ifdef USE_FLU_WRAP_GROUP
if (scrollbar.visible() && (ex>x()+w()-scrollbar.w() || scrolling)) {
EDEBUG(DBG"scrolling\n");
this->take_focus();
scrolling=true;
return scrollbar.handle(e);
}
#else
if (get_scroll()->visible() && (ex>x()+w()-get_scroll()->w() || scrolling)) {
EDEBUG(DBG"scrolling\n");
this->take_focus();
scrolling=true;
return get_scroll()->handle(e);
}
#endif
int inside=0;
for (int i=0; i<children(); i++) {
Fl_Button* b = (Fl_Button*)child(i);
if (ex>b->x()+SELECTION_EDGE && ex<b->x()+b->w()-SELECTION_EDGE && ey>b->y()+SELECTION_EDGE && ey<b->y()+b->h()-SELECTION_EDGE) {
inside=i+1; break;
}
}
if (inside) {
// If widget isn't selected, unselect everything else and select this
if (!selected(inside)) {
for (int i=0;i<children();i++) {
// We cannot use select(i+1,0) because that would mess with focus
Fl_Button* b = (Fl_Button*)child(i);
b->color(FL_BACKGROUND2_COLOR);
b->labelcolor(FL_FOREGROUND_COLOR);
}
int i=0;
while (m_selected[i]!=0) m_selected[i++]=0;
select(inside,1);
redraw(); // show changes in selection state
}
// Construct dnd string and start dnd
edelib::String selected_items;
for (int i=1; i<=children(); i++)
if (selected(i)==1) {
selected_items += "file://";
selected_items += path(i);
selected_items += "\r\n";
}
// If paste_callback_ isn't set, that means we don't support dnd
if (paste_callback_) {
EDEBUG(DBG"- dnd.\n");
dragx=ex; dragy=ey; // to test the min. distance
Fl::belowmouse(this); // without this, we will never get FL_DND_RELEASE!!!
Fl::copy(selected_items.c_str(),selected_items.length(),0);
Fl::dnd();
}
return 1;
} else { // if(inside)...
// Drag to select (a.k.a. "laso") operation (outside widgets)
// Draw a dashed line around icons
EDEBUG(DBG"- laso begin.\n");
laso=true;
// Set coordinates for selection box (drawn in draw())
select_x1=select_x2=Fl::event_x();
select_y1=select_y2=Fl::event_y();
}
} else { // if (!laso) ...
// Ongoing laso operation, update selection coordinates
select_x2=Fl::event_x();
select_y2=Fl::event_y();
redraw();
EDEBUG(DBG"- laso box (%d,%d,%d,%d).\n",select_x1,select_y1,select_x2,select_y2);
}
return 1;
} // if (e==FL_DRAG) ...
// ------------------------------------------------
// FL_RELEASE does many things:
// - (un)select items,
// - terminate laso operation,
// - show context menu,
// - doubleclick,
// ------------------------------------------------
// Mouse button released
if (e==FL_RELEASE) {
EDEBUG(DBG"FL_RELEASE! ");
// Unselect everything unless Shift or Ctrl is held
if (!Fl::event_state(FL_SHIFT) && !Fl::event_state(FL_CTRL)) {
for (int i=0;i<children();i++) {
// We cannot use select(i+1,0) because that would mess with focus
Fl_Button* b = (Fl_Button*)child(i);
b->color(FL_BACKGROUND2_COLOR);
b->labelcolor(FL_FOREGROUND_COLOR);
}
redraw();
int i=0;
while (m_selected[i]!=0) m_selected[i++]=0;
}
if (scrolling) {
EDEBUG(DBG"- stop scrolling.\n");
scrolling=false;
}
// Stop laso operation
if (laso) {
EDEBUG(DBG"- stop laso.\n");
laso=false;
// Order coordinates
int tmp;
if (select_x1>select_x2) { tmp=select_x1; select_x1=select_x2; select_x2=tmp; }
if (select_y1>select_y2) { tmp=select_y1; select_y1=select_y2; select_y2=tmp; }
// Exclude edges
select_x1 += SELECTION_EDGE;
select_y1 += SELECTION_EDGE;
select_x2 -= SELECTION_EDGE;
select_y2 -= SELECTION_EDGE;
EDEBUG(DBG"After fixing the box coords: (%d,%d,%d,%d)\n", select_x1, select_y1, select_x2, select_y2);
// Find which buttons were lasoed
int i;
for (i=0; i<children(); i++) {
Fl_Widget* w = child(i); // some shortcuts
int wx2 = w->x()+w->w();
int wy2 = w->y()+w->h();
// ignore the empty space below label -- equals number of \n's
const char* lbl=w->label();
for (int j=strlen(lbl)-2; j>0; j--) {
if (lbl[j]!='\n') break;
wy2 -= fl_size();
}
if (select_x2>w->x() && select_x1<wx2 && select_y2>w->y() && select_y1<wy2) {
select(i+1,1);
EDEBUG(DBG"Select widget: '%20s' (%d,%d,%d,%d)\n", w->label(), w->x(), w->y(), wx2, wy2);
}
}
// Shift key is the same as Ctrl with laso
select_x1=select_x2=select_y1=select_y2=0;
redraw();
// Single click
} else { // if(laso)...
// Find child that was clicked
int i;
for (i=0; i<children(); i++)
if (Fl::event_inside(child(i))) {
EDEBUG(DBG"in child %d\n",i);
// Shift key means "select everything in between"
if (Fl::event_state(FL_SHIFT)) {
int dir = (get_focus()<i) ? 1 : -1;
for (int j=get_focus(); j!=i+1; j+=dir)
select(j,1);
}
select(i+1,1);
}
// Didn't click on icon - remove focus from all icons
if (i==children()) {
this->take_focus();
focused=0;
}
}
// Right button - call context menu
if (Fl::event_button() == 3) {
Fl::event_is_click(0); // prevent doubleclicking with right button
if (context_callback_) context_callback_(this, (void*)path(get_focus()));
}
// Double-click operation
if (Fl::event_clicks()) {
do_callback();
}
}
// ------------------------------------------------
// Drag&drop support (apart from FL_DRAG)
// ------------------------------------------------
// If paste_callback_ isn't set, that means we don't support dnd
if (paste_callback_) {
if (e==FL_DND_ENTER) { EDEBUG(DBG"FL_DND_ENTER\n"); }
if (e==FL_DND_DRAG) { EDEBUG(DBG"FL_DND_DRAG\n"); }
if (e==FL_DND_RELEASE) { EDEBUG(DBG"FL_DND_RELEASE\n"); }
// Let the window manager know that we accept dnd
if (e==FL_DND_ENTER||e==FL_DND_LEAVE||e==FL_DND_DRAG) return 1;
static bool dndrelease=false;
if (e==FL_DND_RELEASE) {
EDEBUG(DBG"FL_DND_RELEASE '%s'\n", Fl::event_text());
// Sometimes drag is accidental
if (abs(Fl::event_x()-dragx)<MIN_DISTANCE_FOR_DND && abs(Fl::event_y()-dragy)<MIN_DISTANCE_FOR_DND)
return 0;
// return 1 would call Fl::paste(*belowmouse(),0) (see fl_dnd_x.cxx around line 168).
// In our case that could be catastrophic
dndrelease=true;
Fl::paste(*this,0);
}
if (e==FL_PASTE) {
EDEBUG(DBG"FL_PASTE\n");
if (!Fl::event_text() || !Fl::event_length()) return 1;
EDEBUG(DBG"1 '%s' (%d)\n",Fl::event_text(),Fl::event_length());
// Paste comes from menu/keyboard
if (!dndrelease) {
paste_callback_(0); // 0 = current dir
return 1;
}
dndrelease=false;
// Where is the user dropping?
// It it's inside an item, try pasting
int ex=Fl::event_x(); int ey=Fl::event_y();
for (int i=0; i<children(); i++) {
Fl_Button* b = (Fl_Button*)child(i);
if (ex>b->x()+SELECTION_EDGE && ex<b->x()+b->w()-SELECTION_EDGE && ey>b->y()+SELECTION_EDGE && ey<b->y()+b->h()-SELECTION_EDGE) {
paste_callback_(path(i+1));
return 0;
}
}
// Nothing found... assume current directory
paste_callback_(0);
return 0;
}
} // if(paste_callback_)...
// End of handle()
#ifdef USE_FLU_WRAP_GROUP
return Flu_Wrap_Group::handle(e);
#else
return edelib::ExpandableGroup::handle(e);
#endif
}
/* $Id */
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