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Code Issues Activity Actions

ImageViewer: Enable and disable navigation

Browse source 
Before there was dialogs to indicate if
current file is last or first.

So in this commit, I added functionality to enable
and disable forward and backward navigation based
on if the next file is avialable or not and if the
pervious file is avialable or not, respectively.

ImageViewer: Refactor code and init data

Data intialization was not happening properly, now I did
Initializations properly so that navigation can work from
the very first image.
This commit is contained in:
Mohsan Ali 2021-09-03 23:36:13 +05:00 • committed by Ali Mohammad Pur
parent f160fe0407
commit 102d345a8f
3 changed files with 64 additions and 35 deletions
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68
Userland/Applications/ImageViewer/ViewWidget.cpp
View file

@ -1,6 +1,7 @@
/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2021, Mohsan Ali <mohsan0073@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -60,42 +61,52 @@ void ViewWidget::rotate(Gfx::RotationDirection rotation_direction)
resize_window();
}
bool ViewWidget::is_next_available() const
{
if (m_current_index.has_value())
return m_current_index.value() + 1 < m_files_in_same_dir.size();
return false;
}
bool ViewWidget::is_previous_available() const
{
if (m_current_index.has_value())
return m_current_index.value() > 0;
return false;
}
Vector<String> ViewWidget::load_files_from_directory(const String& path) const
{
Vector<String> files_in_directory;
auto current_dir = LexicalPath(path).parent().string();
Core::DirIterator iterator(current_dir, Core::DirIterator::Flags::SkipDots);
while (iterator.has_next()) {
String file = iterator.next_full_path();
if (!Gfx::Bitmap::is_path_a_supported_image_format(file))
continue;
files_in_directory.append(file);
}
return files_in_directory;
}
void ViewWidget::set_path(const String& path)
{
m_path = path;
m_files_in_same_dir = load_files_from_directory(path);
m_current_index = m_files_in_same_dir.find_first_index(path);
}
void ViewWidget::navigate(Directions direction)
{
if (m_path == nullptr)
return;
auto current_dir = LexicalPath(m_path).parent().string();
if (m_files_in_same_dir.is_empty()) {
Core::DirIterator iterator(current_dir, Core::DirIterator::Flags::SkipDots);
while (iterator.has_next()) {
String file = iterator.next_full_path();
if (!Gfx::Bitmap::is_path_a_supported_image_format(file))
continue;
m_files_in_same_dir.append(file);
}
}
auto current_index = m_files_in_same_dir.find_first_index(m_path);
if (!current_index.has_value()) {
if (!m_current_index.has_value()) {
return;
}
size_t index = current_index.value();
auto index = m_current_index.value();
if (direction == Directions::Back) {
if (index == 0) {
GUI::MessageBox::show(window(), "This is the first file.", "Cannot open image", GUI::MessageBox::Type::Error);
return;
}
index--;
} else if (direction == Directions::Forward) {
if (index == m_files_in_same_dir.size() - 1) {
GUI::MessageBox::show(window(), "This is the last file.", "Cannot open image", GUI::MessageBox::Type::Error);
return;
}
index++;
} else if (direction == Directions::First) {
index = 0;
@ -103,6 +114,7 @@ void ViewWidget::navigate(Directions direction)
index = m_files_in_same_dir.size() - 1;
}
m_current_index = index;
this->load_from_file(m_files_in_same_dir.at(index));
}