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LibGUI: Add a GUI::FontPicker dialog class :^)

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This allows you to pick & choose a font by selecting the family, weight
and size you want. It shows you a nice preview sentence and everything.
This commit is contained in:
Andreas Kling 2020-12-30 17:43:35 +01:00
parent aacab897e8
commit ddaa526769
4 changed files with 336 additions and 0 deletions
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177
Libraries/LibGUI/FontPicker.cpp Normal file
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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibGUI/Button.h>
#include <LibGUI/FontPicker.h>
#include <LibGUI/FontPickerDialogGML.h>
#include <LibGUI/ItemListModel.h>
#include <LibGUI/Label.h>
#include <LibGUI/ListView.h>
#include <LibGUI/Widget.h>
#include <LibGfx/FontDatabase.h>
namespace GUI {
FontPicker::FontPicker(Window* parent_window, const Gfx::Font* current_font)
: Dialog(parent_window)
{
set_title("Font picker");
resize(540, 300);
set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/app-font-editor.png"));
auto& widget = set_main_widget<GUI::Widget>();
if (!widget.load_from_gml(font_picker_dialog_gml))
ASSERT_NOT_REACHED();
m_family_list_view = static_cast<ListView&>(*widget.find_descendant_by_name("family_list_view"));
m_weight_list_view = static_cast<ListView&>(*widget.find_descendant_by_name("weight_list_view"));
m_size_list_view = static_cast<ListView&>(*widget.find_descendant_by_name("size_list_view"));
m_sample_text_label = static_cast<Label&>(*widget.find_descendant_by_name("sample_text_label"));
HashTable<String> families;
Gfx::FontDatabase::the().for_each_font([&](auto& font) {
families.set(font.family());
});
for (auto& family : families)
m_families.append(family);
m_family_list_view->set_model(ItemListModel<String>::create(m_families));
m_family_list_view->on_selection = [this](auto& index) {
m_family = index.data().to_string();
HashTable<int> weights;
Gfx::FontDatabase::the().for_each_font([&](auto& font) {
if (font.family() == m_family.value())
weights.set(font.weight());
});
m_weights.clear();
Optional<size_t> index_of_old_weight_in_new_list;
size_t i = 0;
for (auto& weight : weights) {
m_weights.append(weight);
if (m_weight.has_value() && weight == m_weight.value())
index_of_old_weight_in_new_list = i;
++i;
}
m_weight_list_view->set_model(ItemListModel<int>::create(m_weights));
m_weight_list_view->set_cursor(m_weight_list_view->model()->index(index_of_old_weight_in_new_list.value_or(0)), GUI::AbstractView::SelectionUpdate::Set);
update_sample_label();
};
m_weight_list_view->on_selection = [this](auto& index) {
m_weight = index.data().to_i32();
m_sizes.clear();
Optional<size_t> index_of_old_size_in_new_list;
Gfx::FontDatabase::the().for_each_font([&](auto& font) {
if (font.family() == m_family.value() && font.weight() == m_weight.value()) {
if (m_size.has_value() && m_size.value() == font.presentation_size())
index_of_old_size_in_new_list = m_sizes.size();
m_sizes.append(font.presentation_size());
}
});
m_size_list_view->set_model(ItemListModel<int>::create(m_sizes));
m_size_list_view->set_cursor(m_size_list_view->model()->index(index_of_old_size_in_new_list.value_or(0)), GUI::AbstractView::SelectionUpdate::Set);
update_sample_label();
};
m_size_list_view->on_selection = [this](auto& index) {
m_size = index.data().to_i32();
update_sample_label();
};
auto& ok_button = static_cast<Button&>(*widget.find_descendant_by_name("ok_button"));
ok_button.on_click = [this](auto) {
done(ExecOK);
};
auto& cancel_button = static_cast<Button&>(*widget.find_descendant_by_name("cancel_button"));
cancel_button.on_click = [this](auto) {
done(ExecCancel);
};
set_font(current_font);
}
FontPicker::~FontPicker()
{
}
void FontPicker::set_font(const Gfx::Font* font)
{
if (m_font == font)
return;
m_font = font;
m_sample_text_label->set_font(m_font);
if (!m_font) {
m_weights.clear();
m_sizes.clear();
m_weight_list_view->set_model(nullptr);
m_size_list_view->set_model(nullptr);
return;
}
size_t family_index = 0;
for (size_t i = 0; i < m_families.size(); ++i) {
if (m_families[i] == m_font->family()) {
family_index = i;
break;
}
}
m_family_list_view->set_cursor(m_family_list_view->model()->index(family_index), GUI::AbstractView::SelectionUpdate::Set);
size_t weight_index = 0;
for (size_t i = 0; i < m_weights.size(); ++i) {
if (m_weights[i] == m_font->weight()) {
weight_index = i;
break;
}
}
m_weight_list_view->set_cursor(m_weight_list_view->model()->index(weight_index), GUI::AbstractView::SelectionUpdate::Set);
size_t size_index = 0;
for (size_t i = 0; i < m_sizes.size(); ++i) {
if (m_sizes[i] == m_font->presentation_size()) {
size_index = i;
break;
}
}
m_size_list_view->set_cursor(m_size_list_view->model()->index(size_index), GUI::AbstractView::SelectionUpdate::Set);
}
void FontPicker::update_sample_label()
{
if (m_family.has_value() && m_size.has_value() && m_weight.has_value())
set_font(Gfx::FontDatabase::the().get(m_family.value(), m_size.value(), m_weight.value()));
}
}