Initial import of Dillo

dw/fltkpreview.cc

@@ -0,0 +1,311 @@
+/*
+ * Dillo Widget
+ *
+ * Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../lout/msg.h"
+
+#include "fltkpreview.hh"
+#include "fltkmisc.hh"
+
+#include <FL/Fl.H>
+#include <FL/Fl_Bitmap.H>
+#include <FL/fl_draw.H>
+#include <stdio.h>
+
+#include "preview.xbm"
+
+namespace dw {
+namespace fltk {
+
+FltkPreview::FltkPreview (int x, int y, int w, int h,
+                          dw::core::Layout *layout, const char *label):
+   FltkViewBase (x, y, w, h, label)
+{
+   layout->attachView (this);
+
+   scrollX = 0;
+   scrollY = 0;
+   scrollWidth = 1;
+   scrollHeight = 1;
+}
+
+FltkPreview::~FltkPreview ()
+{
+}
+
+int FltkPreview::handle (int event)
+{
+   return FltkViewBase::handle (event);
+}
+
+int FltkPreview::translateViewXToCanvasX (int x)
+{
+   return x * canvasWidth / w ();
+}
+
+int FltkPreview::translateViewYToCanvasY (int y)
+{
+   return y * canvasHeight / h ();
+}
+
+int FltkPreview::translateCanvasXToViewX (int x)
+{
+   return x * w () / canvasWidth;
+}
+
+int FltkPreview::translateCanvasYToViewY (int y)
+{
+   return y * h () / canvasHeight;
+}
+
+void FltkPreview::setCanvasSize (int width, int ascent, int descent)
+{
+   FltkViewBase::setCanvasSize (width, ascent, descent);
+   if (parent() && parent()->visible ())
+      ((FltkPreviewWindow*)parent())->reallocate ();
+}
+
+bool FltkPreview::usesViewport ()
+{
+   return true;
+}
+
+int FltkPreview::getHScrollbarThickness ()
+{
+   return 0;
+}
+
+int FltkPreview::getVScrollbarThickness ()
+{
+   return 0;
+}
+
+int FltkPreview::getScrollbarOnLeft ()
+{
+   return 0;
+}
+
+void FltkPreview::scrollTo (int x, int y)
+{
+   scrollX = x;
+   scrollY = y;
+}
+
+void FltkPreview::scroll (dw::core::ScrollCommand cmd)
+{
+   MSG_ERR("FltkPreview::scroll not implemented\n");
+}
+
+void FltkPreview::setViewportSize (int width, int height,
+                                   int hScrollbarThickness,
+                                   int vScrollbarThickness)
+{
+   scrollWidth = width - vScrollbarThickness;
+   scrollHeight = height - hScrollbarThickness;
+}
+
+void FltkPreview::drawText (core::style::Font *font,
+                            core::style::Color *color,
+                            core::style::Color::Shading shading,
+                            int x, int y, const char *text, int len)
+{
+   /*
+    * We must call setfont() before calling getwidth() (or anything
+    * else that measures text).
+    */
+   FltkFont *ff = (FltkFont*)font;
+   Fl::set_font(ff->font, translateCanvasXToViewX (ff->size));
+#if 0
+   /**
+    * \todo Normally, this should already be known, maybe it
+    * should be passed?
+    */
+   int width = (int)getwidth (text, len);
+   int height = font->ascent; // No descent, this would look to "bold".
+
+   int x1 = translateCanvasXToViewX (x);
+   int y1 = translateCanvasYToViewY (y);
+   int x2 = translateCanvasXToViewX (x + width);
+   int y2 = translateCanvasYToViewY (y + height);
+   Rectangle rect (x1, y1, x2 - x1, y2 - y1);
+
+   setcolor(((FltkColor*)color)->colors[shading]);
+   fillrect (rect);
+#endif
+   fl_color(((FltkColor*)color)->colors[shading]);
+   fl_draw(text, len, translateCanvasXToViewX (x), translateCanvasYToViewY(y));
+}
+
+void FltkPreview::drawSimpleWrappedText (core::style::Font *font,
+                                         core::style::Color *color,
+                                         core::style::Color::Shading shading,
+                                         int x, int y, int w, int h,
+                                         const char *text)
+{
+}
+
+void FltkPreview::drawImage (core::Imgbuf *imgbuf, int xRoot, int yRoot,
+                int x, int y, int width, int height)
+{
+}
+
+bool FltkPreview::usesFltkWidgets ()
+{
+   return false;
+}
+
+void FltkPreview::drawFltkWidget (Fl_Widget *widget,
+                                  core::Rectangle *area)
+{
+}
+
+// ----------------------------------------------------------------------
+
+FltkPreviewWindow::FltkPreviewWindow (dw::core::Layout *layout):
+   Fl_Menu_Window (1, 1)
+{
+   box (FL_EMBOSSED_BOX);
+
+   begin ();
+   preview = new FltkPreview (BORDER_WIDTH, BORDER_WIDTH, 1, 1, layout);
+   end ();
+
+   hide ();
+}
+
+FltkPreviewWindow::~FltkPreviewWindow ()
+{
+}
+
+void FltkPreviewWindow::showWindow ()
+{
+   reallocate ();
+   show ();
+}
+
+void FltkPreviewWindow::reallocate ()
+{
+   int maxWidth = misc::screenWidth () / 2;
+   int maxHeight = misc::screenHeight () * 4 / 5;
+   int mx, my, width, height;
+   bool warp = false;
+
+   if (preview->canvasHeight * maxWidth > maxHeight * preview->canvasWidth) {
+      // Expand to maximal height (most likely case).
+      width = preview->canvasWidth * maxHeight / preview->canvasHeight;
+      height = maxHeight;
+   } else {
+      // Expand to maximal width.
+      width = maxWidth;
+      height = preview->canvasHeight * maxWidth / preview->canvasWidth;
+   }
+
+   Fl::get_mouse(mx, my);
+
+   posX = mx - preview->translateCanvasXToViewX (preview->scrollX
+                                                 + preview->scrollWidth / 2);
+   posY = my - preview->translateCanvasYToViewY (preview->scrollY
+                                                 + preview->scrollHeight / 2);
+
+   if (posX < 0) {
+      mx -= posX;
+      posX = 0;
+      warp = true;
+   } else if (posX + width > misc::screenWidth ()) {
+      mx -= (posX - (misc::screenWidth () - width));
+      posX = misc::screenWidth () - width;
+      warp = true;
+   }
+
+   if (posY < 0) {
+      my -= posY;
+      posY = 0;
+      warp = true;
+   } else if (posY + height > misc::screenHeight ()) {
+      my -= (posY - (misc::screenHeight () - height));
+      posY = misc::screenHeight () - height;
+      warp = true;
+   }
+
+   if (warp)
+      misc::warpPointer (mx, my);
+
+   resize (posX, posY, width, height);
+
+   preview->size(w () - 2 * BORDER_WIDTH, h () - 2 * BORDER_WIDTH);
+}
+
+void FltkPreviewWindow::hideWindow ()
+{
+   Fl_Window::hide ();
+}
+
+void FltkPreviewWindow::scrollTo (int mouseX, int mouseY)
+{
+   preview->scrollX =
+      preview->translateViewXToCanvasX (mouseX - posX - BORDER_WIDTH)
+      - preview->scrollWidth / 2;
+   preview->scrollY =
+      preview->translateViewYToCanvasY (mouseY - posY - BORDER_WIDTH)
+      - preview->scrollHeight / 2;
+   preview->theLayout->scrollPosChanged (preview,
+                                         preview->scrollX, preview->scrollY);
+}
+
+// ----------------------------------------------------------------------
+
+FltkPreviewButton::FltkPreviewButton (int x, int y, int w, int h,
+                                      dw::core::Layout *layout,
+                                      const char *label):
+   Fl_Button (x, y, w, h, label)
+{
+   image (new Fl_Bitmap (preview_bits, preview_width, preview_height));
+   window = new FltkPreviewWindow (layout);
+}
+
+FltkPreviewButton::~FltkPreviewButton ()
+{
+}
+
+int FltkPreviewButton::handle (int event)
+{
+   /** \bug Some parts are missing. */
+
+   switch (event) {
+   case FL_PUSH:
+      window->showWindow ();
+      return Fl_Button::handle (event);
+
+   case FL_DRAG:
+      if (window->visible ()) {
+         window->scrollTo (Fl::event_x_root (), Fl::event_y_root ());
+         return 1;
+      }
+      return Fl_Button::handle (event);
+
+   case FL_RELEASE:
+      window->hideWindow ();
+      return Fl_Button::handle (event);
+
+   default:
+      return Fl_Button::handle (event);
+   }
+}
+
+} // namespace fltk
+} // namespace dw