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iThe cursor now behaves properly in the dialogs...
[lyx.git] / src / frontends / xforms / FormBase.C
1 /**
2  * \file FormBase.C
3  * Copyright 2000-2001 The LyX Team.
4  * See the file COPYING.
5  *
6  * \author Angus Leeming, a.leeming@ic.ac.uk
7  */
8
9 #include <config.h>
10
11 #ifdef __GNUG__
12 #pragma implementation
13 #endif
14
15 #include "Dialogs.h"
16 #include "FormBase.h"
17 #include "xformsBC.h"
18 #include "GUIRunTime.h"
19 #include "Tooltips.h"
20 #include "support/LAssert.h"
21
22 extern "C" {
23
24 // Callback function invoked by xforms when the dialog is closed by the
25 // window manager
26 static int C_WMHideCB(FL_FORM * form, void *);
27
28 // Callback function invoked by the xforms pre- and post-handler routines
29 static int C_PrehandlerCB(FL_OBJECT *, int, FL_Coord, FL_Coord, int, void *);
30
31 } // extern "C"
32
33
34 FormBase::FormBase(ControlButtons & c, string const & t, bool allowResize)
35         : ViewBC<xformsBC>(c), minw_(0), minh_(0), allow_resize_(allowResize),
36           title_(t), tooltips_(new Tooltips)
37 {}
38
39
40 FormBase::~FormBase()
41 {
42         delete tooltips_;
43 }
44
45
46 Tooltips & FormBase::tooltips()
47 {
48         return *tooltips_;
49 }
50
51
52 void FormBase::redraw()
53 {
54         if (form() && form()->visible)
55                 fl_redraw_form(form());
56 }
57
58
59 void FormBase::show()
60 {
61         if (!form()) {
62                 build();
63         }
64
65         // use minw_ to flag whether the dialog has ever been shown
66         // (Needed now that build() is/should be called from the controller)
67         if (minw_ == 0) {
68                 bc().refresh();
69
70                 // work around dumb xforms sizing bug
71                 minw_ = form()->w;
72                 minh_ = form()->h;
73
74                 fl_set_form_atclose(form(), C_WMHideCB, 0);
75         }
76
77         fl_freeze_form(form());
78         update();  // make sure its up-to-date
79         fl_unfreeze_form(form());
80
81         if (form()->visible) {
82                 fl_raise_form(form());
83                 /* This XMapWindow() will hopefully ensure that
84                  * iconified dialogs are de-iconified. Mad props
85                  * out to those crazy Xlib guys for forgetting a
86                  * XDeiconifyWindow(). At least WindowMaker, when
87                  * being notified of the redirected MapRequest will
88                  * specifically de-iconify. From source, fvwm2 seems
89                  * to do the same.
90                  */
91                 XMapWindow(fl_get_display(), form()->window);
92         } else {
93                 // calls to fl_set_form_minsize/maxsize apply only to the next
94                 // fl_show_form(), so this comes first.
95                 fl_set_form_minsize(form(), minw_, minh_);
96                 if (!allow_resize_)
97                         fl_set_form_maxsize(form(), minw_, minh_);
98
99                 fl_show_form(form(),
100                         FL_PLACE_MOUSE | FL_FREE_SIZE,
101                         (controller_.IconifyWithMain() ? FL_TRANSIENT : 0),
102                         title_.c_str());
103         }
104
105         // Set the initial state of the cursor
106         if (form()->visible) {
107                 int const cursor = Tooltips::enabled() ?
108                         XC_question_arrow : FL_DEFAULT_CURSOR;
109                 fl_set_cursor(form()->window, cursor);
110         }
111 }
112
113
114 void FormBase::hide()
115 {
116         // xforms sometimes tries to process a hint-type MotionNotify, and
117         // use XQueryPointer, without verifying if the window still exists.
118         // So we try to clear out motion events in the queue before the
119         // DestroyNotify
120         XSync(fl_get_display(), false);
121         GUIRunTime::processEvents();
122
123         if (form() && form()->visible)
124                 fl_hide_form(form());
125 }
126
127
128 void FormBase::setPrehandler(FL_OBJECT * ob)
129 {
130         lyx::Assert(ob);
131         fl_set_object_prehandler(ob, C_PrehandlerCB);
132 }
133
134
135 void FormBase::InputCB(FL_OBJECT * ob, long data)
136 {
137         // It is possible to set the choice to 0 when using the
138         // keyboard shortcuts. This work-around deals with the problem.
139         if (ob && ob->objclass == FL_CHOICE && fl_get_choice(ob) < 1) {
140                 fl_set_choice(ob, 1);
141         }
142
143         bc().input(input(ob, data));
144 }
145
146
147 ButtonPolicy::SMInput FormBase::input(FL_OBJECT *, long)
148 {
149         return ButtonPolicy::SMI_VALID;
150 }
151
152
153 namespace {
154
155 FormBase * GetForm(FL_OBJECT * ob)
156 {
157         lyx::Assert(ob && ob->form && ob->form->u_vdata);
158         FormBase * ptr = static_cast<FormBase *>(ob->form->u_vdata);
159         return ptr;
160 }
161
162 } // namespace anon
163
164
165 extern "C" {
166
167 void C_FormBaseApplyCB(FL_OBJECT * ob, long)
168 {
169         GetForm(ob)->ApplyButton();
170 }
171
172
173 void C_FormBaseOKCB(FL_OBJECT * ob, long)
174 {
175         GetForm(ob)->OKButton();
176 }
177
178
179 void C_FormBaseCancelCB(FL_OBJECT * ob, long)
180 {
181         FormBase * form = GetForm(ob);
182         form->CancelButton();
183 }
184
185
186 void C_FormBaseRestoreCB(FL_OBJECT * ob, long)
187 {
188         GetForm(ob)->RestoreButton();
189 }
190
191
192 void C_FormBaseInputCB(FL_OBJECT * ob, long d)
193 {
194         GetForm(ob)->InputCB(ob, d);
195 }
196
197
198 static int C_WMHideCB(FL_FORM * form, void *)
199 {
200         // Close the dialog cleanly, even if the WM is used to do so.
201         lyx::Assert(form && form->u_vdata);
202         FormBase * ptr = static_cast<FormBase *>(form->u_vdata);
203         ptr->CancelButton();
204         return FL_CANCEL;
205 }
206
207 static int C_PrehandlerCB(FL_OBJECT * ob, int event,
208                           FL_Coord, FL_Coord, int key, void *)
209 {
210         // Note that the return value is important in the pre-emptive handler.
211         // Don't return anything other than 0.
212         lyx::Assert(ob);
213
214         // Don't Assert this one, as it can happen quite naturally when things
215         // are being deleted in the d-tor.
216         //Assert(ob->form);
217         if (!ob->form) return 0;
218
219         FormBase * ptr = static_cast<FormBase *>(ob->form->u_vdata);
220   
221         if (ptr)
222                 ptr->PrehandlerCB(ob, event, key);
223
224         return 0;
225 }
226  
227 } // extern "C"