118 lines
3.1 KiB
Rust
118 lines
3.1 KiB
Rust
/*! Drawing the UI */
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use cairo;
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use std::cell::RefCell;
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use ::keyboard;
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use ::layout::{ Button, Layout };
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use ::layout::c::{ EekGtkKeyboard, Point };
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use glib::translate::FromGlibPtrNone;
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use gtk::WidgetExt;
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mod c {
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use super::*;
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use cairo_sys;
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use std::os::raw::c_void;
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// This is constructed only in C, no need for warnings
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#[allow(dead_code)]
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#[repr(transparent)]
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#[derive(Clone, Copy)]
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pub struct EekRenderer(*const c_void);
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#[no_mangle]
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extern "C" {
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// Button and View inside CButtonPlace are safe to pass to C
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// as long as they don't outlive the call
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// and nothing dereferences them
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#[allow(improper_ctypes)]
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pub fn eek_render_button(
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renderer: EekRenderer,
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cr: *mut cairo_sys::cairo_t,
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button: *const Button,
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pressed: u64,
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locked: u64,
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);
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}
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/// Draws all buttons that are not in the base state
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#[no_mangle]
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pub extern "C"
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fn squeek_layout_draw_all_changed(
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layout: *mut Layout,
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renderer: EekRenderer,
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cr: *mut cairo_sys::cairo_t,
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) {
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let layout = unsafe { &mut *layout };
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let cr = unsafe { cairo::Context::from_raw_none(cr) };
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layout.foreach_visible_button(|offset, button| {
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let state = RefCell::borrow(&button.state).clone();
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let locked = state.action.is_active(&layout.current_view);
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if state.pressed == keyboard::PressType::Pressed || locked {
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render_button_at_position(
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renderer, &cr,
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offset,
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button.as_ref(),
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state.pressed, locked,
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);
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}
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})
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}
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#[no_mangle]
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pub extern "C"
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fn squeek_draw_layout_base_view(
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layout: *mut Layout,
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renderer: EekRenderer,
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cr: *mut cairo_sys::cairo_t,
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) {
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let layout = unsafe { &mut *layout };
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let cr = unsafe { cairo::Context::from_raw_none(cr) };
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layout.foreach_visible_button(|offset, button| {
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render_button_at_position(
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renderer, &cr,
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offset,
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button.as_ref(),
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keyboard::PressType::Released, false,
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);
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})
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}
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}
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/// Renders a button at a position (button's own bounds ignored)
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pub fn render_button_at_position(
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renderer: c::EekRenderer,
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cr: &cairo::Context,
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position: Point,
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button: &Button,
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pressed: keyboard::PressType,
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locked: bool,
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) {
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cr.save();
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cr.translate(position.x, position.y);
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cr.rectangle(
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0.0, 0.0,
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button.size.width, button.size.height
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);
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cr.clip();
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unsafe {
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c::eek_render_button(
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renderer,
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cairo::Context::to_raw_none(&cr),
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button as *const Button,
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pressed as u64,
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locked as u64,
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)
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};
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cr.restore();
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}
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pub fn queue_redraw(keyboard: EekGtkKeyboard) {
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let widget = unsafe { gtk::Widget::from_glib_none(keyboard.0) };
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widget.queue_draw();
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}
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