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Diffstat (limited to 'examples/clipboard.cxx')
| -rw-r--r-- | examples/clipboard.cxx | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/examples/clipboard.cxx b/examples/clipboard.cxx new file mode 100644 index 0000000..9d5ac24 --- /dev/null +++ b/examples/clipboard.cxx @@ -0,0 +1,172 @@ +// +// "$Id: clipboard.cxx 10377 2014-10-14 11:53:51Z AlbrechtS $" +// +// Clipboard display test application for the Fast Light Tool Kit (FLTK). +// +// Copyright 1998-2014 by Bill Spitzak and others. +// +// This library is free software. Distribution and use rights are outlined in +// the file "COPYING" which should have been included with this file. If this +// file is missing or damaged, see the license at: +// +// http://www.fltk.org/COPYING.php +// +// Please report all bugs and problems on the following page: +// +// http://www.fltk.org/str.php +// + +#include <FL/Fl_Window.H> +#include <FL/Fl_Box.H> +#include <FL/Fl_Image.H> +#include <FL/Fl_Text_Buffer.H> +#include <FL/Fl_Text_Display.H> +#include <FL/Fl_Tabs.H> +#include <FL/Fl_Button.H> +#include <FL/Fl.H> +#include <FL/fl_draw.H> + +/* Displays and follows the content of the clipboard with either image or text data + */ + +Fl_Box *image_box; +Fl_Box *image_size; +Fl_Text_Display *display; + +class chess : public Fl_Box { // a box with a chess-like pattern below its image +public: + chess(int x, int y, int w, int h) : Fl_Box(FL_FLAT_BOX,x,y,w,h,0) { + align(FL_ALIGN_CENTER | FL_ALIGN_CLIP); + } + void draw() { + draw_box(); + Fl_Image *im = image(); + if (im) { // draw the chess pattern below the box centered image + int X = x() + (w()-im->w())/2, Y = y() + (h()-im->h())/2, W = im->w(), H = im->h(); + fl_push_clip(X,Y,W,H); + fl_push_clip(x(),y(),w(),h()); + fl_color(FL_WHITE); fl_rectf(X,Y,W,H); + fl_color(FL_LIGHT2); + const int side = 4, side2 = 2*side; + for (int j=Y; j<Y+H; j+=side) { + for (int i=X + (j-Y)%side2; i<X+W; i+=side2) { + fl_rectf(i,j,side,side); + } + } + fl_pop_clip(); + fl_pop_clip(); + } + draw_label(); // draw the box image + } +} *chess_obj; + +#define TAB_COLOR FL_DARK3 + +class clipboard_viewer : public Fl_Tabs { // use tabs to display as appropriate the image or textual content of the clipboard +public: + clipboard_viewer(int x, int y, int w, int h) : Fl_Tabs(x,y,w,h) {}; + virtual int handle(int event) { + if (event != FL_PASTE) return Fl_Tabs::handle(event); + if (strcmp(Fl::event_clipboard_type(), Fl::clipboard_image) == 0) { // an image is being pasted + Fl_Image *im = (Fl_Image*)Fl::event_clipboard(); // get it as an Fl_Image object + if (!im) return 1; + char title[300]; + sprintf(title, "%dx%d",im->w(), im->h()); // display the image original size +#ifdef WIN32 + OpenClipboard(NULL); // display extra technical info about clipboard content + char *p=title + strlen(title); + int format = EnumClipboardFormats(0); + if (format && format < CF_MAX) { sprintf(p, " %d",format); p += strlen(p); } + while (format) { + format = EnumClipboardFormats(format); + if (format && format < CF_MAX) { sprintf(p, " %d",format); p += strlen(p); } + } + HANDLE h; + if ((h = GetClipboardData(CF_DIB))) { + LPBITMAPINFO lpBI = (LPBITMAPINFO)GlobalLock(h); + sprintf(p, " biBitCount=%d biCompression=%d biClrUsed=%d", + lpBI->bmiHeader.biBitCount, (int)lpBI->bmiHeader.biCompression, (int)lpBI->bmiHeader.biClrUsed); + } + CloseClipboard(); +#endif + float scale_x = (float)im->w() / image_box->w(); // rescale the image if larger than the display box + float scale_y = (float)im->h() / image_box->h(); + float scale = scale_x; + if (scale_y > scale) scale = scale_y; + if (scale > 1) { + Fl_Image *im2 = im->copy(im->w()/scale, im->h()/scale); + delete im; + im = im2; + } + Fl_Image *oldim = image_box->image(); + if (oldim) delete oldim; + image_box->image(im); // show the scaled image + image_size->copy_label(title); + value(image_box->parent()); + window()->redraw(); + } + else { // text is being pasted + display->buffer()->text(Fl::event_text()); + value(display); + display->redraw(); + } + return 1; + } +} *tabs; + + +void cb(Fl_Widget *wid, clipboard_viewer *tabs) +{ + if (Fl::clipboard_contains(Fl::clipboard_image)) { + Fl::paste(*tabs, 1, Fl::clipboard_image); // try to find image in the clipboard + return; + } + if (Fl::clipboard_contains(Fl::clipboard_plain_text)) Fl::paste(*tabs, 1, Fl::clipboard_plain_text); // also try to find text +} + +void clip_callback(int source, void *data) { // called after clipboard was changed or at application activation + if ( source == 1 ) cb(NULL, (clipboard_viewer *)data); +} + +int main(int argc, char **argv) +{ +#if !(defined(__APPLE__) || defined(WIN32)) + extern void fl_register_images(); + fl_register_images(); // required to allow pasting of images +#endif + Fl_Window* win = new Fl_Window(500, 550, "clipboard viewer"); + tabs = new clipboard_viewer(0, 0, 500, 500); + Fl_Group *g = new Fl_Group( 5, 30, 490, 460, Fl::clipboard_image); // g will display the image form + g->box(FL_FLAT_BOX); + image_box = new chess(5, 30, 490, 450); + image_size = new Fl_Box(FL_NO_BOX, 5, 485, 490, 10, 0); + g->end(); + g->selection_color(TAB_COLOR); + + Fl_Text_Buffer *buffer = new Fl_Text_Buffer(); + display = new Fl_Text_Display(5,30,490, 460, Fl::clipboard_plain_text); // display will display the text form + display->buffer(buffer); + display->selection_color(TAB_COLOR); + tabs->end(); + tabs->resizable(display); + + Fl_Group *g2 = new Fl_Group( 10,510,200,25); + Fl_Button *refresh = new Fl_Button(10,510,200,25, "Refresh from clipboard"); + refresh->callback((Fl_Callback*)cb, tabs); + g2->end(); + g2->resizable(NULL); + win->end(); + win->resizable(tabs); + win->show(argc,argv); +#if defined(__APPLE__) || defined(WIN32) + clip_callback(1, tabs); // use clipboard content at start +#endif + Fl::add_clipboard_notify(clip_callback, tabs); // will update with new clipboard content immediately or at application activation + + Fl_Image::RGB_scaling(FL_RGB_SCALING_BILINEAR); // set bilinear image scaling method + return Fl::run(); +} + +// +// End of "$Id: clipboard.cxx 10377 2014-10-14 11:53:51Z AlbrechtS $". +// |