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she/gtk: add a simple image preview

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This adds a simple image preview for image formats supported by
Gdk::Pixbuf.
This commit is contained in:
Gabriel Rauter 2016-03-07 15:46:08 +01:00
parent 745fd180d4
commit 29eaaea1fd
1 changed files with 18 additions and 0 deletions
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18
src/she/gtk/native_dialogs.cpp
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@ -21,6 +21,8 @@
#include <gtkmm/filechooserdialog.h>
#include <gtkmm/button.h>
#include <gtkmm/filefilter.h>
#include <gtkmm/image.h>
#include <gdkmm/pixbuf.h>
#include <glibmm/refptr.h>
#include <glibmm/miscutils.h>
#include <glibmm/fileutils.h>
@ -47,6 +49,9 @@ public:
FileDialogGTK3::lastUsedDir() = Glib::get_user_special_dir(Glib::USER_DIRECTORY_DOCUMENTS);
#endif
}
this->set_use_preview_label(false);
this->set_preview_widget(m_preview);
this->signal_update_preview().connect(sigc::mem_fun(this, &FileDialogGTK3::updatePreview));
}
void on_show() override {
@ -125,6 +130,18 @@ public:
m_file_name = filename;
}
void updatePreview() {
this->set_preview_widget_active(false);
std::string fileName = this->get_filename();
try {
if (!Glib::file_test(fileName, Glib::FILE_TEST_IS_DIR)) {
auto previewPixbuf = Gdk::Pixbuf::create_from_file(fileName, 256, 256, true);
m_preview.set(previewPixbuf);
this->set_preview_widget_active();
}
} catch(Glib::Error e) {}
}
bool show(Display* parent) override {
//keep pointer on parent display to get information later
m_display = parent;
@ -156,6 +173,7 @@ private:
std::map<std::string, Glib::RefPtr<Gtk::FileFilter>> m_filters;
Gtk::Button* m_ok_button;
Glib::RefPtr<Gtk::Application> m_app;
Gtk::Image m_preview;
Display* m_display;
bool m_cancel;
static std::string& lastUsedDir() { static std::string lastUsedDir; return lastUsedDir; }