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Add autocomplete for file saving

This commit is contained in:
daleclack 2022-05-21 10:32:50 +08:00
parent b2a7ab4574
commit c89ed7e1ae
2 changed files with 60 additions and 21 deletions
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68
Gtkmm3/gtk129_drawing2/src/drawing.cc
View File

@ -1,11 +1,11 @@
#include "drawing.hh"
#include <algorithm>
#include <iostream>
Drawing::Drawing()
: main_label("Select a color"),
: fill_check("Enable Fill Color"),
main_label("Select a color"),
size_label("Pen Size"),
pos_label("Mouse Position"),
pos_label1("(0,0)"),
left_box(Gtk::ORIENTATION_VERTICAL, 5),
main_box(Gtk::ORIENTATION_HORIZONTAL, 5),
btn_box(Gtk::ORIENTATION_VERTICAL, 5),
@ -53,8 +53,8 @@ Drawing::Drawing()
size_adj = Gtk::Adjustment::create(3.0, 1.0, 20.0);
scale.set_adjustment(size_adj);
scale.set_value_pos(Gtk::POS_BOTTOM);
btn_box.pack_start(pos_label, Gtk::PACK_SHRINK);
btn_box.pack_start(pos_label1, Gtk::PACK_SHRINK);
btn_box.pack_start(fill_check, Gtk::PACK_SHRINK);
btn_box.pack_start(fill_btn, Gtk::PACK_SHRINK);
btn_box.pack_start(main_label, Gtk::PACK_SHRINK);
btn_box.pack_start(color_btn, Gtk::PACK_SHRINK);
btn_box.pack_start(size_label, Gtk::PACK_SHRINK);
@ -67,7 +67,7 @@ Drawing::Drawing()
// Add Gesture
btn_clear.signal_clicked().connect(sigc::mem_fun(*this, &Drawing::btnclear_clicked));
btn_save.signal_clicked().connect(sigc::mem_fun(*this,&Drawing::btnsave_clicked));
btn_save.signal_clicked().connect(sigc::mem_fun(*this, &Drawing::btnsave_clicked));
btn_exit.signal_clicked().connect(sigc::mem_fun(*this, &Drawing::hide));
drag = Gtk::GestureDrag::create(draw_area);
@ -90,6 +90,9 @@ Drawing::Drawing()
m_color.set_alpha(1);
color_btn.set_rgba(m_color);
color_btn.signal_color_set().connect(sigc::mem_fun(*this, &Drawing::color_set));
fill_color = m_color;
fill_btn.set_rgba(fill_color);
fill_btn.signal_color_set().connect(sigc::mem_fun(*this, &Drawing::color_set));
// Initalial draw
auto cr = Cairo::Context::create(surface);
@ -112,13 +115,14 @@ Drawing::Drawing()
show_all_children();
}
void Drawing::btnsave_clicked(){
void Drawing::btnsave_clicked()
{
// Create a dialog
dialog = Gtk::FileChooserNative::create("Save to png file",*this,
Gtk::FILE_CHOOSER_ACTION_SAVE,"OK","Cancel");
dialog = Gtk::FileChooserNative::create("Save to png file", *this,
Gtk::FILE_CHOOSER_ACTION_SAVE, "OK", "Cancel");
// Link Signal
dialog->signal_response().connect(sigc::mem_fun(*this,&Drawing::dialog_response));
dialog->signal_response().connect(sigc::mem_fun(*this, &Drawing::dialog_response));
// Create Filters
@ -135,16 +139,25 @@ void Drawing::btnsave_clicked(){
dialog->show();
}
void Drawing::dialog_response(int response_id){
void Drawing::dialog_response(int response_id)
{
// Save cairo surface to png file
if(response_id == Gtk::RESPONSE_ACCEPT){
// Write surface data to a png file
if (response_id == Gtk::RESPONSE_ACCEPT)
{
// Get file name
std::string filename;
auto file = dialog->get_file();
filename = file->get_path();
// Auto complete the extension of the image file
size_t length = filename.length();
std::string extension = filename.substr(length-3,length-1);
std::transform(extension.begin(),extension.end(),extension.begin(),::tolower);
if(extension != "png"){
filename += ".png";
}
// Write surface data to the file
surface->write_to_png(filename);
}
dialog.reset();
@ -242,22 +255,33 @@ void Drawing::draw_brush(double x, double y, DrawProcess process)
cr.clear();
break;
case DrawMode::Circle:
// Fill Color and Delete the brush
if (fill_check.get_active())
{
cr->arc(rel_x, rel_y, sqrt((x - rel_x) * (x - rel_x) + (y - rel_y) * (y - rel_y)), 0.0, 2 * G_PI);
// Fill Color
draw_fill_color(cr);
}
cr->arc(rel_x, rel_y, sqrt((x - rel_x) * (x - rel_x) + (y - rel_y) * (y - rel_y)), 0.0, 2 * G_PI);
cr->set_source_rgba(m_color.get_red(), m_color.get_green(),
m_color.get_blue(), m_color.get_alpha());
// Fill Color and Delete the brush
cr->stroke();
cr.clear();
break;
case DrawMode::Rectangle:
// Fill Color and Delete the brush
if (fill_check.get_active())
{
// Fill Color
cr->rectangle(rel_x, rel_y, abs(x - rel_x), abs(y - rel_y));
draw_fill_color(cr);
}
cr->rectangle(rel_x, rel_y, abs(x - rel_x), abs(y - rel_y));
cr->set_source_rgba(m_color.get_red(), m_color.get_green(),
m_color.get_blue(), m_color.get_alpha());
// Fill Color and Delete the brush
cr->stroke();
cr.clear();
break;
@ -265,6 +289,13 @@ void Drawing::draw_brush(double x, double y, DrawProcess process)
draw_area.queue_draw();
}
void Drawing::draw_fill_color(const Cairo::RefPtr<Cairo::Context> &cr)
{
cr->set_source_rgba(fill_color.get_red(), fill_color.get_green(),
fill_color.get_blue(), fill_color.get_alpha());
cr->fill();
}
void Drawing::button_press(int n_press, double x, double y)
{
auto button = press->get_current_button();
@ -315,4 +346,5 @@ void Drawing::drag_end(double x, double y)
void Drawing::color_set()
{
m_color = color_btn.get_rgba();
fill_color = fill_btn.get_rgba();
}

13
Gtkmm3/gtk129_drawing2/src/drawing.hh
View File

@ -24,15 +24,16 @@ class Drawing : public Gtk::Window
// Child Widgets
Gtk::DrawingArea draw_area;
Gtk::ColorButton color_btn;
Gtk::Label main_label, size_label, pos_label, pos_label1;
Gtk::ColorButton color_btn, fill_btn;
Gtk::CheckButton fill_check;
Gtk::Label main_label, size_label;
Gtk::Box left_box, main_box, btn_box;
Gtk::Button btn_clear, btn_save, btn_exit;
Gtk::RadioButton btn_free, btn_line, btn_circle, btn_rectangle;
Gtk::Scale scale;
// Color Setting
Gdk::RGBA m_color;
Gdk::RGBA m_color, fill_color;
Cairo::RefPtr<Cairo::ImageSurface> surface;
// Image Save Dialog
@ -51,10 +52,15 @@ class Drawing : public Gtk::Window
double start_x, start_y;
// Signal Handlers
// Part 1: Drawing signal handlers
bool draw_event(const Cairo::RefPtr<Cairo::Context> &context);
void draw_brush(double x, double y, DrawProcess process = DrawProcess::Update);
void draw_fill_color(const Cairo::RefPtr<Cairo::Context> &cr);
// Part 2: Signal handler for gestures
void button_press(int n_press, double x, double y);
void drag_begin(double x, double y);
@ -63,6 +69,7 @@ class Drawing : public Gtk::Window
void drag_end(double x, double y);
// Part 3: Signal Hanlders for normal buttons on the UI
void color_set();
void btnfree_clicked();