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151 lines (128 loc) · 4.59 KB
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//
// This is a sample implementation of a User Interface Button
// Using the engine screen/element systems and the SelectionManager script
//
// To use add a script component with the 'button' script
// and add textures for each state:
var Button = pc.createScript('button');
Button.attributes.add("defaultTexture", {type: "asset", assetType: "texture"});
Button.attributes.add("defaultUvs", {type: "vec4", default: [0,0,1,1]});
Button.attributes.add("hoverTexture", {type: "asset", assetType: "texture"});
Button.attributes.add("hoverUvs", {type: "vec4", default: [0,0,1,1]});
Button.attributes.add("activatedTexture", {type: "asset", assetType: "texture"});
Button.attributes.add("activatedUvs", {type: "vec4", default: [0,0,1,1]});
Button.attributes.add("disabledTexture", {type: "asset", assetType: "texture"});
Button.attributes.add("disabledUvs", {type: "vec4", default: [0,0,1,1]});
Button.prototype.initialize = function () {
this.on('activestate', this._onActiveState, this);
this.on('hoverstate', this._onHoverState, this);
this.on('disabledstate', this._onDisabledState, this);
this._active = this._active || false;
this._hover = this._hover || false;
this._disabled = this._disabled || false;
this._onActiveState(this._active);
this._onHoverState(this._hover);
this._onDisabledState(this._disabled);
this.attach();
};
Button.prototype.attach = function () {
this.entity.selector.on('pointerenter', this._onEnter, this);
this.entity.selector.on('pointerleave', this._onExit, this);
this.entity.selector.on('pointerdown', this._onMouseDown, this);
this.entity.selector.on('pointerup', this._onMouseUp, this);
};
Button.prototype.detach = function () {
this.entity.selector.off('pointerenter', this._onEnter, this);
this.entity.selector.off('pointerleave', this._onExit, this);
this.entity.selector.off('pointerdown', this._onMouseDown, this);
this.entity.selector.off('pointerup', this._onMouseUp, this);
};
Object.defineProperty(Button.prototype, "hover", {
get: function () {
return this._hover;
},
set: function (v) {
if (this._hover !== v) {
this._hover = v;
this.fire("hoverstate", this._hover);
}
}
});
Object.defineProperty(Button.prototype, "active", {
get: function () {
return this._active;
},
set: function (v) {
if (this._active !== v) {
this._active = v;
this.fire("activestate", this._active);
}
}
});
Object.defineProperty(Button.prototype, "disabled", {
get: function () {
return this._disabled;
},
set: function (v) {
if (this._disabled !== v) {
this._disabled = v;
this.fire("disabledstate", this._disabled);
}
}
});
Button.prototype._onHoverState = function (state) {
if (this._active) return;
if (this._disabled) return;
if (state) {
this.entity.element.textureAsset = this.hoverTexture;
this.entity.element.rect = this.hoverUvs;
} else {
this.entity.element.textureAsset = this.defaultTexture;
this.entity.element.rect = this.defaultUvs;
}
}
Button.prototype._onActiveState = function (state) {
if (this._disabled) return;
if (state) {
this.entity.element.textureAsset = this.activatedTexture;
this.entity.element.rect = this.activatedUvs;
} else {
if (this.hover) {
this.entity.element.textureAsset = this.hoverTexture;
this.entity.element.rect = this.hoverUvs
} else {
this.entity.element.textureAsset = this.defaultTexture;
this.entity.element.rect = this.defaultUvs;
}
}
}
Button.prototype._onDisabledState = function (state) {
if (state) {
this.entity.element.textureAsset = this.disabledTexture;
this.entity.element.rect = this.disabledUvs;
this.entity.element.opacity = 0.75;
} else {
this.entity.element.opacity = 1;
if (this.hover) {
this.entity.element.textureAsset = this.highlightTexture;
this.entity.element.rect = this.highlightUvs
} else {
this.entity.element.textureAsset = this.defaultTexture;
this.entity.element.rect = this.defaultUvs;
}
}
};
Button.prototype._onEnter = function () {
this.hover = true;
}
Button.prototype._onExit = function () {
this.hover = false;
this.active = false;
}
Button.prototype._onMouseDown = function () {
this.active = true;
}
Button.prototype._onMouseUp = function () {
this.active = false;
if (!this._disabled) this.fire('press');
}