2 Copyright (C) 2011 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "gtkmm2ext/cairocell.h"
25 #include "gtkmm2ext/utils.h"
32 using namespace Gtkmm2ext;
34 static const double cairo_font_fudge = 1.5;
36 CairoFontDescription::CairoFontDescription (Pango::FontDescription& fd)
38 _size = cairo_font_fudge * (fd.get_size() / PANGO_SCALE);
40 switch (fd.get_style()) {
41 case Pango::STYLE_NORMAL:
42 slant = Cairo::FONT_SLANT_NORMAL;
44 case Pango::STYLE_OBLIQUE:
45 slant = Cairo::FONT_SLANT_OBLIQUE;
47 case Pango::STYLE_ITALIC:
48 slant = Cairo::FONT_SLANT_ITALIC;
52 switch (fd.get_weight()) {
53 case Pango::WEIGHT_ULTRALIGHT:
54 weight = Cairo::FONT_WEIGHT_NORMAL;
57 case Pango::WEIGHT_LIGHT:
58 weight = Cairo::FONT_WEIGHT_NORMAL;
61 case Pango::WEIGHT_NORMAL:
62 weight = Cairo::FONT_WEIGHT_NORMAL;
65 case Pango::WEIGHT_SEMIBOLD:
66 weight = Cairo::FONT_WEIGHT_BOLD;
69 case Pango::WEIGHT_BOLD:
70 weight = Cairo::FONT_WEIGHT_BOLD;
73 case Pango::WEIGHT_ULTRABOLD:
74 weight = Cairo::FONT_WEIGHT_BOLD;
77 case Pango::WEIGHT_HEAVY:
78 weight = Cairo::FONT_WEIGHT_BOLD;
83 face = fd.get_family();
86 CairoCell::CairoCell (int32_t id)
97 CairoTextCell::CairoTextCell (int32_t id, double wc, boost::shared_ptr<CairoFontDescription> font)
107 CairoTextCell::set_text (const std::string& txt)
113 CairoTextCell::render (Cairo::RefPtr<Cairo::Context>& context)
115 if (!_visible || _width_chars == 0) {
119 _font->apply (context);
120 context->move_to (bbox.x, bbox.y + bbox.height + y_offset);
121 context->show_text (_text);
125 CairoTextCell::set_size (Cairo::RefPtr<Cairo::Context>& context)
127 const uint32_t lim = (uint32_t) ceil (_width_chars);
130 double max_width = 0.0;
131 double max_height = 0.0;
132 Cairo::TextExtents ext;
137 _font->apply (context);
139 for (int digit = 0; digit < 10; digit++) {
141 for (n = 0; n < lim; ++n) {
142 buf[n] = '0' + digit;
145 context->get_text_extents (buf, ext);
147 max_width = max (ext.width + ext.x_bearing, max_width);
148 max_height = max (ext.height, max_height);
149 bsum += ext.x_bearing;
152 /* add the average x-bearing for all digits as right hand side padding */
154 bbox.width = max_width + (bsum/10.0);
156 /* some fonts and some digits get their extents computed "too small", so fudge this
159 bbox.height = max_height;
162 CairoCharCell::CairoCharCell (int32_t id, char c)
163 : CairoTextCell (id, 1)
169 CairoCharCell::set_size (Cairo::RefPtr<Cairo::Context>& context)
171 Cairo::TextExtents ext;
173 _font->apply (context);
176 const char* buf = "8";
177 context->get_text_extents (buf, ext);
178 /* same height as an "8" */
179 bbox.height = ext.height;
183 const char* buf = ":";
184 context->get_text_extents (buf, ext);
185 bbox.width = ext.width + (2.0 * ext.x_bearing);
186 /* center vertically */
187 y_offset = (ext.height - bbox.height) / 2.0;
191 CairoEditableText::CairoEditableText (boost::shared_ptr<CairoFontDescription> font)
195 , max_cell_height (0)
202 add_events (Gdk::POINTER_MOTION_HINT_MASK | Gdk::SCROLL_MASK | Gdk::KEY_PRESS_MASK | Gdk::KEY_RELEASE_MASK |
203 Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK | Gdk::SCROLL_MASK);
204 set_flags (Gtk::CAN_FOCUS);
206 set_can_default (true);
207 set_receives_default (true);
210 CairoEditableText::~CairoEditableText ()
212 /* we don't own cells */
216 CairoEditableText::on_scroll_event (GdkEventScroll* ev)
218 CairoCell* cell = find_cell (ev->x, ev->y);
221 return scroll (ev, cell);
228 CairoEditableText::on_focus_in_event (GdkEventFocus* ev)
234 CairoEditableText::on_focus_out_event (GdkEventFocus* ev)
237 queue_draw_cell (editing_cell);
244 CairoEditableText::add_cell (CairoCell* cell)
246 cells.push_back (cell);
248 CairoTextCell* tc = dynamic_cast<CairoTextCell*>(cell);
251 tc->set_font (_font);
258 CairoEditableText::clear_cells ()
265 CairoEditableText::set_width_chars (CairoTextCell* cell, uint32_t wc)
268 cell->set_width_chars (wc);
274 CairoEditableText::set_text (CairoTextCell* cell, const string& text)
276 cell->set_text (text);
277 queue_draw_cell (cell);
281 CairoEditableText::on_expose_event (GdkEventExpose* ev)
283 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
289 context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
292 Gtk::Allocation alloc = get_allocation ();
293 double width = alloc.get_width();
294 double height = alloc.get_height ();
297 context->set_source_rgba (bg_r, bg_g, bg_b, bg_a);
298 if (_corner_radius) {
299 rounded_rectangle (context, 0, 0, width, height, _corner_radius);
301 context->rectangle (0, 0, width, height);
306 for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
308 CairoCell* cell = (*i);
310 /* is cell inside the expose area?
313 if (cell->intersects (ev->area)) {
314 if (cell == editing_cell) {
315 context->set_source_rgba (edit_r, edit_b, edit_g, edit_a);
317 context->set_source_rgba (r, g, b, a);
320 cell->render (context);
328 CairoEditableText::queue_draw_cell (CairoCell* cell)
330 Glib::RefPtr<Gdk::Window> win = get_window();
340 r.set_width (cell->width());
341 r.set_height (cell->height());
344 win->invalidate_region (rg, true);
348 CairoEditableText::find_cell (uint32_t x, uint32_t y)
350 for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
351 if ((*i)->covers (x, y)) {
360 CairoEditableText::on_button_press_event (GdkEventButton* ev)
362 CairoCell* cell = find_cell (ev->x, ev->y);
363 return button_press (ev, cell);
367 CairoEditableText::on_button_release_event (GdkEventButton* ev)
369 CairoCell* cell = find_cell (ev->x, ev->y);
370 return button_release (ev, cell);
374 CairoEditableText::start_editing (CairoCell* cell)
380 queue_draw_cell (cell);
386 CairoEditableText::stop_editing ()
389 queue_draw_cell (editing_cell);
395 CairoEditableText::set_cell_sizes ()
397 Glib::RefPtr<Gdk::Window> win = get_window();
403 Cairo::RefPtr<Cairo::Context> context = win->create_cairo_context();
409 for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
410 (*i)->set_size (context);
415 CairoEditableText::on_size_request (GtkRequisition* req)
422 for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
423 max_cell_width += (*i)->width();
424 max_cell_height = std::max ((double) (*i)->height(), max_cell_height);
427 req->width = max_cell_width;
428 req->height = max_cell_height;
432 CairoEditableText::on_size_allocate (Gtk::Allocation& alloc)
434 Misc::on_size_allocate (alloc);
436 /* position each cell so that its centered in the allocated space
439 double x = (alloc.get_width() - max_cell_width)/2.0;
440 double y = (alloc.get_height() - max_cell_height)/2.0;
442 CellMap::iterator i = cells.begin();
444 while (i != cells.end()) {
445 CairoCell* cell = (*i);
447 cell->set_position (x, y);
450 if (++i != cells.end()) {
451 /* only add cell padding intra-cellularly */
460 CairoEditableText::set_font (Pango::FontDescription& fd)
462 boost::shared_ptr<CairoFontDescription> cd (new CairoFontDescription (fd));
467 CairoEditableText::set_font (boost::shared_ptr<CairoFontDescription> fd)
469 for (CellMap::iterator i = cells.begin(); i != cells.end(); ++i) {
470 CairoTextCell* tc = dynamic_cast<CairoTextCell*>(*i);
471 if (tc && (!tc->font() || tc->font() == _font)) {